1986 C4 Corvette

1986 Corvette Overview

For those that lived through that era, 1986 probably resonates as one of the most innovative and exciting years of the entire decade.  It was the year that the Human Genome Project began, a study which would help science understand and map the genetic structure of the human body.  IMAP (Internet Mail Access Protocol), the groundwork for Email, was put into place, forever changing the way humans would communicate with each other.  IBM unveiled the “PC Convertible”, the first ever laptop computer.

Model:	1986 Corvette
Generation:	C4 Corvette
Type:	2 Door Coupe, 2 Door Convertible
Available Colors:	Silver Metallic, Medium Grey Metallic, Medium Blue Metallic, Yellow, White, Black, Gold Metallic, Silver Beige Metallic, Copper Metallic, Medium Brown Metallic, Dark Red Metallic, Bright Red, Silver/Grey, Grey/Black, White/Silver, Silver Beige/Medium Brown, Silver Beige/Black
Engine:	350CI, 230/235 Horsepower, Tuned-Port Fuel Injected L98 V8 Engine.
VIN:	1G1YY0789G5100001 – 1G1YY0789G5127794 (Coupe) 1G1YY6789G5900001 – 1G1YY6789G5907315 (Convertible)
Transmission:	4-speed automatic (standard), 4+3 speed manual (optional)
Original Price:	$27,027.00 (Coupe), $32,032.00 (Convertible)
Units Produced:	35,109
Specs:	1986 Corvette Spec List

And, in its own way, General Motors was also pioneering new territory as they continued the evolution of their famous sports car. With the continual refinement of their L98 engine, a bigger focus on safety and security, and the development of many new functional and luxury features, the arrival of the 1986 Corvette carried with it the continuation of the spirit of innovation that had helped Corvette rise to become a world leader in the sports car market since its humble beginnings in 1953.

Since the introduction of the C4 Corvette in 1984, a significant increase in Corvette theft had been reported all across the country.  Of all the Corvettes built in 1984 and 1985, approximately 7 percent had been stolen.  Recognizing a need to make their cars more secure for the customers who were purchasing them, General Motors introduced a new security technology as a standard feature on all Corvettes.

“VATS” or “Vehicle Anti-Theft System” was a simple but effective addition to the existing alarm system.  A small metal pellet with a specific electrical resistance was impeded in the ignition key, and had to be read by a hidden, electronic “decoder” before the engine could start.

Using the wrong key would cause the decoder to shut down both the starter relay and the fuel pump for a minimum of two minutes (although there are recorded incidents where the car would remain immobilized for as long as 15 minutes) before allowing the operator another attempt at starting the car.  After the introduction of the VATS system in 1986, Corvette theft dropped from 7% to less than 1% in 1986 and to near 0% by late 1987/early 1988.

The results of this technology was significant enough to prompt many automotive insurance companies to reduce their comprehensive premium rates for Corvettes equipped with VATS by 20-25 percent.

Another advancement of the 1986 model year involved the introduction of the first anti-lock braking system to the Chevrolet Corvette.  Antilock brakes (or ABS), which utilized the latest ABS II setup from Bosch in Germany, prevented wheel lock up in extreme braking conditions and reduced/eliminated skidding and subsequent loss of control of the car.  ABS was relatively new in 1986 and its usage was limited mainly to high-cost luxury cars.  Although no additional changes were made to the Corvette’s braking system, the addition of the ABS helped the Corvette further gain acceptance as the true world-class sports car that Chevy said it was.

Still other, less notable (but equally significant) changes were made.  Under the hood, the L98 engine received an upgrade when the cylinder heads were changed from cast-iron to aluminum, reducing the car’s curb weight by 125 pounds.

This reduction in weight made the 1986 Corvette the first ‘Vette in twenty years to weigh less than 3,000 pounds.  However, reducing the car’s weight resulted in defective components under the hood.  The new L98 engine aluminum heads were discovered to be a little too thin during durability testing, the result of which was cracking around the head attachment bosses during high engine loads.  As a result, it was quickly determined that the heads had to be replaced with thicker ones.  Although the replacement heads were delayed until well into the middle of the model year, they proved to be a most valuable addition.  The replacement heads incorporated centrally located copper-core spark plugs for better combustion.  They also included larger intake ports and sintered-metal valve seats.   The engines that were fitted with aluminum heads were rated at 235 horsepower, which was a 5 horsepower increase from 1985 and early 1986 models that were fitted with cast iron heads.

DID YOU KNOW: Fifty 1986 “Malcolm Konner Commemorative Edition” Corvettes were built in a special arrangement honoring the New Jersey Chevrolet dealership’s founder, Malcolm Konner. Each Corvette was painted a two-tone paint scheme: Silver Beige over Black. Window stickers reflected 4001ZA as the RPO, and a $500.00 cost was listed for MALCOLM KONNER SP. EDIT. PAI (Malcolm Konner Special Edition Paint). All of the Malcolm Konner Special Edition cars were coupes. Twenty were built with manual transmissions while the other thirty were fitted with automatics. All had graphite leather interiors.

Other mechanical changes were made to the Corvette as well, though none provided any performance improvement.

Amongst these changes, the exhaust system was revised, introducing triple catalytic converters to meet the ever increasing Federal emissions standards that were put into place for 1986.

Wheel caster was changed from 3.8 degrees to 6.0 degrees to improve on-center road feel and to decrease wander.  The standard tires were changed to P245/VR5016s, which was an increase in size from the previous year’s model line.

However, for the Z51 package, the tires continued to be P255s.  The overall size of the fuel tank was reduced by two gallons on automatic Corvette models.

Cosmetic, but functional, changes were also introduced on the 1986 Corvette.  Above the rear hatch window, a high-mounted stop lamp was added.  This brake light, which was introduced as part of a new Federal requirement, was a key distinguishing feature of the 1986 Corvette, as it was one of the few outward changes that was made to the C4 since its introduction in 1984.

Elsewhere, small changes appeared throughout the car.  In the cockpit, the LCD instruments were re-angled to aid in daytime legibility.  Despite the re-angling, the digital dashboard continued to be a problem during daytime operation of the Corvette.

New to the dash cluster in ’86 was the introduction of an upshift indicator light which was intended to help drivers achieve maximum fuel mileage by signaling the optimal time to shift gears during vehicle operation.

While considered an unnecessary feature by many consumers, it’s intent was to help keep the car’s EPA mileage figures above the gas-guzzler level.  (As an interesting side note, the shift indicator light was tied into all automatic transmissions as well.)

Additionally, “low coolant” and “anti-lock” (in reference to the anti-lock brakes) instrument displays were also added.  Wheels were given raised hub emblems and a bright brushed finish which replaced the black centers of the 1984 and 1985 models.

But for all of this, the most significant change didn’t come as an optional component, but rather as an entirely optional model type – the Corvette Convertible.  Chevrolet engineers, aided in part by engineers from the “American Sunroof Company”, had stated that the C4 Corvette’s design had always been intended to support a convertible variant of the beloved coupe, and so they knew that transforming the car from coupe to convertible would be a straight forward process.  Because the absence of the roof pillar (and other supporting hardware) would increase body flex in the car, reinforcement was applied to the frame cross member in front of the engine.  Larger X-braces were added to tie door-hinge pillars to the rear chassis torque boxes and larger K-shape braces were used to connect the under engine member to the frame rails.   Additional structural reinforcements were added to the cowl structure, including the steering column, its mounts, the front torque box and the dashboard mounting beam.  Similarly, a crossbeam was added to the rear torque box, and the steel rider behind the seats became a sturdier, double-wall structure.

Although the 1986 Corvette did not see any track time (as a race car) when introduced, 1986 was still a significant year for Corvette Racing. It was the year that Tommy Milner, driver of the #3 Compuware C6.R Corvette, entered the world. Milner was born on January 28, 1986 in Washington D.C. and  joined the No. 3 Compuware C6.R Corvette Racing team in 2011, where he was partnered with Oliver Beretta, the most successful driver in ALMS history. This pairing of youth and experience proved to be a winning combination as, in his rookie year, Milner helped Beretta bring the No. 3 Corvette to victory in the 2011 running of the 24 Hours of LeMans.

Subtle cosmetic changes were made for the convertible as well, although the Corvette maintained a clear likeness to its coupe counterpart.  For one, the rear center taillight was moved from the rear deck lid glass and was instead inserted in the upper center of the rear bumper fascia, just above the rear Corvette nameplate.  For another, the cockpit featured a cowling that discreetly covered the convertible top, giving the 1986 Corvette an appearance that was as much “roadster” as convertible.

The new Corvette convertible was only fifty pounds heavier than the coupe and, because of the careful attention spent in reinforcing its structural design, was actually more rigid than the coupe, proving that the convertible could be as competitively functional as the coupe.  Of course, this type of additional innovation carried additional cost, and the convertible Corvette was no exception.  Its introduction in 1986 was accompanied by a $5000.00 price increase over the coupe.

The arrival of the convertible brought with it Corvette’s ceremonial return to racing.  Although the announcement came late in the automotive season, its introduction occurred in time for the Corvette to be invited to participate in that year’s Indianapolis 500 as the official Pace Car.  The 1986 Corvette convertible would become the second Corvette in history (second only to its 1978 forerunner) to serve as a pace car at the Indianapolis 500, and Chevrolet was more than proud that its two-seat convertible needed no special performance or engineering modifications to help the car reach the necessary speeds to lead a field of race cars around the famous Brickyard racetrack.    With the exception of safety-conscious strobe lights, a pair of five point harnesses (driver and passenger), and an onboard fire system, the yellow, 230-horsepower convertible that led the pace lap on May 31, 1986 was nearly identical to all other Corvette convertibles sold to the public that year.

Although the actual pace cars were painted a bright yellow and wore special “Official Pace Car” badges, General Motors deemed that every Corvette convertible built in 1986 would be a street-going Indy pacer, regardless of color.  In fact, no special limited-edition “pace car” package option was ever offered, but instead, consumers were given the option of adding a dealer-offered commemorative decals to the doors of their 1986 Corvette.

Interestingly, the arrival of the new Corvette Convertible in 1986 resulted in less than stellar sales. Probably due in large part to “sticker shock”, there was only 7,315 Corvette convertibles sold that year.  While there was certainly no question that Corvette engineers, workers and fans alike welcomed back the nostalgia-filled convertible, its price proved to put the car just out of reach for most consumers looking to purchase a convertible sports car that year.

Instead, sales of the Z51 Corvette continued to lead the way, although this option was only made available in coupe form.  Even with its integral X-member reinforcement, the convertible chassis was still no match for the hearty, bone chattering Z51 performance package.

In all, 35,109 Corvettes were sold in 1986.  While this number was still considered to be very respectable, it was the second year in a row that overall Corvette sales numbers had slipped.  Despite these diminished numbers, there was no question that Corvette was continuing to move in the right direction.

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1986 Corvette Image Gallery

See full 1986 CY Corvette Image Gallery

1986 Corvette Specifications

1986 Corvette Main Specs

MODEL:	1985 Chevrolet Corvette
BODY STYLE:	Two-door Coupe/Hatchback, front engine, rear wheel drive
MANUFACTURING LOCATION:	Bowling Green, Kentucky
CONSTRUCTION:	Fiberglass body, unibody construction with partial, front frame including both steel and stainless steel components.
VEHICLE NUMBERS (VIN):	1G1YY0789G5100001 THRU 1G1YY0789G5127794 (coupe) 1G1YY6789G5900001 THRU 1G1YY6789G5907315 (convertible)
VIN SUFFIX:	DKF: 350 CUBIC INCH, 230 HP, IRON HEADS, AUTOMATIC, OIL COOLER DKC: 350 CUBIC INCH, 230 HP, IRON HEADS, AUTOMATIC DKH: 350 CUBIC INCH, 230 HP, IRON HEADS, AUTOMATIC, EXPORT DKD: 350 CUBIC INCH, 230 HP, IRON HEADS, MANUAL, OIL COOLER DKB: 350 CUBIC INCH, 230 HP, IRON HEADS, MANUAL ZJS: 350 CUBIC INCH, 235 HP, ALUMINUM HEADS, AUTO, OIL COOLER ZJH: 350 CUBIC INCH, 235 HP, ALUMINUM HEADS, AUTOMATIC ZKD: 350 CUBIC INCH, 235 HP, ALUMINUM HEADS, AUTOMATIC, EXPORT ZJW: 350 CUBIC INCH, 235 HP, ALUMINUM HEADS, MANUAL, OIL COOLER ZKA: 350 CUBIC INCH, 235 HPR, ALUMINUM HEADS, MANUAL
ENGINE BLOCK NUMBER:	14088548: ALL
HEAD NUMBER:	462624: IRON HEADS, 14101128: ALUMINUM HEADS

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1986 Corvette Pricing & Options

CODE:	DESCRIPTION:	QUANTITY:	RETAIL PRICE:
1YY07	Base Corvette Sport Coupe	27,794	$27,027.00
1YY67	Base Corvette Convertible	7,315	$32,032.00
AG9	Power Driver Seat	33,983	$225.00
AQ9	Sport Seats, leather	13,372	$1,025.00
AR9	Base Seats, leather	—-	$400.00
AU3	Power Door Locks	34,215	$175.00
B4P	Radiator Boost Fan	8,216	$75.00
B4Z	Custom Feature Package	4,832	$195.00
C2L	Dual Removable Roof Panels (coupe)	6,242	$895.00
24S	Removable Roof Panel, blue tint (coupe)	12,021	$595.00
64S	Removable Roof Panel, bronze tint (coupe)	7,819	4595.00
C68	Electronic Air Conditioning Control	16,646	$150.00
D84	Two-Tone Paint (coupe)	3,897	$428.00
FG3	Delco-Bilstein Shock Absorbers	5,521	$189.00
G92	Performance Axle Ratio, 3.07:1	4,879	$22.00
KC4	Engine Oil Cooler	7,394	$110.00
K34	Cruise Control	34,197	$185.00
MM4	4-Speed Manual Transmission	6,835	$0.00
NN5	California Emission Requirements	5,697	$99.00
UL5	Radio Delete	166	-$256.00
UM6	AM-FM Stereo Cassette	2,039	$122.00
UU8	Stereo System, Delco-Bose	32,478	$895.00
V01	Heavy Duty Radiator	10,423	$40.00
Z51	Performance Handling Package (coupe)	10,423	$470.00
Z6A	Rear Window + Side Mirror Defog (coupe)	12,821	$165.00
4001ZA	Malcolm Konner Special Edition (coupe)	50	$500.00

1986 Corvette Exterior & Interior Colors

Exterior Colors

CODE	EXTERIOR	TOTAL	SOFT TOP	INTERIOR COLOR OPTIONS
13	Silver Metallic	1,209	Black, White	Graphite, Medium Gray
18	Medium Grey Metallic	1,603	Black, White	Graphite, Medium Gray, Red
20	Medium Blue Metallic	128	Black, White	Blue, Graphite
35	Yellow	1,464	Black, White	Graphite
40	White	4,176	Black,Saddle,White	Blue, Bronze, Graphite, Medium Gray, Red, Saddle
41	Black	5,464	Black,Saddle,White	Graphite, Medium Gray, Red, Saddle
53	Gold Metallic	777	Black, Saddle	Graphite, Saddle
59	Silver Beige Metallic	1,383	Black	Bronze, Graphite
66	Copper Metallic	4	Black, Saddle	Graphite, Saddle
69	Medium Brown Metallic	488	Saddle	Bronze, Saddle
74	Dark Red Metallic	5,002	Black, Saddle, White	Graphite, Saddle
81	Bright Red	9,466	Black, Saddle, White	Graphite, Red, Saddle
13/18	Silver/Gray	1,049	NONE	Graphite, Medium Gray, Red
18/41	Gray/Black	1,138	NONE	Graphite, Medium Gray
40/13	White/Silver	693	NONE	Graphite, Medium Gray
59/69	Silver Beige/Brown	1,014	NONE	Bronze
SPEC	Silver Beige/Black	50	NONE	Graphit

Exterior Colors

Interior Colors

1986 Corvette Powertrain Specifications

Engine:	L98 5.7 OHV 350 V-8.
Cylinders:	V8
Block Material:	Cast Iron Alloy
Displacement:	5.7 Litre/350 Cubic Inches
Bore & Stroke:	4.00 x 3.48 inches
Valvetrain:	OHV, 2 valves per cyl.
Cylinder Head Material:	Cast Iron Alloy
Cylinder Block Deck Height:	9.025 Inches
Compression Ratio:	9.00:1
Horsepower:	230 HP @ 4,000 RPM
Torque:	330 lb-ft @ 3,200 rpm
Fuel Delivery:	Tuned-Port Fuel Injection
Fuel Capacity:	20.0 Gallons
Oil Capacity:	4.0 Quarts (Without Filter)
Total Dressed Engine Weight (Dry):	585.7 lbs
Transmission:	4+3 Speed Manual (4 Speed Manual with Overdrive in 3rd and 4th), 4-Speed Automatic
Standard Axle Ratio:	2.73:1 (Automatic), 3.07:1 (Manual)

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1986 Corvette Wheels, Suspension & Brakes

Suspension (Coupe)

Front Suspension	Single fiberglass composite mono-leaf transverse spring with unequal-length aluminum control arms and stabilizer bar.
Rear Suspension	Fully independent five-link system with transverse fiberglass single-leaf springs, aluminum upper/lower trailing links and strut-rod tie-rod assembly

Wheels & Tires (Coupe)

Front Tires	P255 / 50VR16
Rear Tires	P255 / 50VR16
Front Wheels	Wheels: 16 x 8
Front Wheels	Wheels: 16 x 8

Brakes (Coupe)

Front Brakes	Power Disc Brakes
Rear Brakes	Power Disc Brakes

1986 Corvette Exterior Dimensions

Coupe Dimensions

Exterior Dimensions (Coupe)		Interior Dimensions (Coupe)
Wheelbase:	96.2 Inches	Headroom:	N/A
Overall Length:	176.5 Inches	Shoulder Room:	N/A
Total Body Width:	71.0 Inches	Hip Room:	N/A
Overall Height:	46.7 Inches	Leg Room:	N/A
Front Track Width:	59.6 Inches
Rear Track Width:	60.4 Inches
Min. Ground Clearance	4.5 Inches

Convertible Dimensions

Exterior Dimensions (Coupe)		Interior Dimensions (Coupe)
Wheelbase:	96.2 Inches	Headroom:	N/A
Overall Length:	176.5 Inches	Shoulder Room:	N/A
Total Body Width:	71.0 Inches	Hip Room:	N/A
Overall Height:	46.7 Inches	Leg Room:	N/A
Front Track Width:	59.6 Inches
Rear Track Width:	60.4 Inches
Min. Ground Clearance	4.5 Inches

Capacities

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1986 Corvette Performance Results

Performance	Results
0-30 MPH:	2.4 Seconds
0-60 MPH:	5.8 Seconds
0-100 MPH:	14.4 Seconds @ 96.0 mph
QUARTER MILE:	N/A
TOP SPEED:	150 mph

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1986 Corvette Vehicle Identification Numbers (VIN)

VIN Range	1G1YY0789G5100001 – 1G1YY0789G5127794 (Coupe) 1G1YY6789G5900001 – 1G1YY6789G5907315 (Convertible)
1 (First Digit)	1 – United States
G (Second Digit)	Manufacturer.  G – General Motors
1 (Third Digit)	Manufacturer Division. 1 – Chevrolet
YY (Fourth & Fifth Digits)	Make of Car. Y – Corvette (Note: In 1990-95, the second “Y” was replaced with a “Z” on ZR-1 models.)
07/67 (Sixth & Seventh Digit)	Bodystyle of Car. 07 – Two Door Hatchback Coupe, 67 – Two Door Convertible
1 (Seventh Digit)	Type of Restraint System.  1 – Passive Restraint System.
8 (Eighth Digit)	Type of Engine.  8 – L98: 5.7 Liter, 350CI Engine with Tuned-Port Injection
7 (Ninth Digit)	Check Digit.
G (Tenth Digit)	The Model Year. G – 1986
5 (Eleventh Digit)	Location of the Assembly Plant. 5 – Bowling Green, Kentucky
1XXXXX (Twelfth thru Seventeenth Digits)	Production Sequence Numbers.

The last six digits begin at 100001 and run thru 127794, accounting for each of the 27,794 Corvette Coupes and the last six digits begin at 900001 and run thru 907315, accounting for each of the 7,315 Corvette Convertibles built in 1986. Each Vehicle Identification Number (VIN) is unique to an individual car.

The Check digit is used to calculate the characters in the serial number and gives it a single digit code that can be used to verify the serial number is legitimate. (Note: The Check digit number varies depending on each specific VIN number.)

For all 1986 Corvettes, the Vehicle Identification Number was stamped on a plate on the inner vertical surface of the left windshield pillar visible through the windshield.

1986 Corvette Factory Options

CODE:	DESCRIPTION:	QUANTITY:	RETAIL PRICE:
1YY07	Base Corvette Sport Coupe	27,794	$27,027.00
1YY67	Base Corvette Convertible	7,315	$32,032.00
AG9	Power Driver Seat	33,983	$225.00
AQ9	Sport Seats, leather	13,372	$1,025.00
AR9	Base Seats, leather	—-	$400.00
AU3	Power Door Locks	34,215	$175.00
B4P	Radiator Boost Fan	8,216	$75.00
B4Z	Custom Feature Package	4,832	$195.00
C2L	Dual Removable Roof Panels (coupe)	6,242	$895.00
24S	Removable Roof Panel, blue tint (coupe)	12,021	$595.00
64S	Removable Roof Panel, bronze tint (coupe)	7,819	4595.00
C68	Electronic Air Conditioning Control	16,646	$150.00
D84	Two-Tone Paint (coupe)	3,897	$428.00
FG3	Delco-Bilstein Shock Absorbers	5,521	$189.00
G92	Performance Axle Ratio, 3.07:1	4,879	$22.00
KC4	Engine Oil Cooler	7,394	$110.00
K34	Cruise Control	34,197	$185.00
MM4	4-Speed Manual Transmission	6,835	$0.00
NN5	California Emission Requirements	5,697	$99.00
UL5	Radio Delete	166	-$256.00
UM6	AM-FM Stereo Cassette	2,039	$122.00
UU8	Stereo System, Delco-Bose	32,478	$895.00
V01	Heavy Duty Radiator	10,423	$40.00
Z51	Performance Handling Package (coupe)	10,423	$470.00
Z6A	Rear Window + Side Mirror Defog (coupe)	12,821	$165.00
4001ZA	Malcolm Konner Special Edition (coupe)	50	$500.00

Base Corvette Sports Coupe (1YY07)

• The base price of a 1986 Chevrolet Corvette Coupe without any optional equipment.
• A 350 cubic inch, 230 horsepower engine, 4-speed automatic transmission, removable body-color roof panel, and cloth seats were included in the base price.

Base Corvette Convertible (1YY67)

• The base price of the 1986 Corvette Convertible without any optional equipment.
• A 350 cubic inch, 230 horsepower engine, 4-speed automatic transmission, collapsable soft top, and cloth seats were included in the base price.
• The 1986 Corvette was the first model to include the convertible option since 1975.
• All 1986 Convertibles sold were designated as pace car replicas regardless of color or option content, and all included decal packages for dealer or customer installation.
• The 1986 Corvette was the pace car for the 1986 Indianapolis 500.

Power Driver Seat (AG9)

• Optional, six-way, adjustable driver seat.

Sports Seat, Leather (AQ9)

• Special sport seats that featured inflatable lumbar support and power-adjusted side bolsters

Base Seats, Leather (AR9)

• Leather cover option for the standard, base driver and passenger seats.

Power Door Locks (AU3)

Electronic locking system that replaced standard, manual door locks.

Radiator Boost Fan (B4P)

• An oscillating fan placed in front of the radiator that is used to push air through the radiator.

Custom Feature Package (B4Z)

• Included rear window defogger, outside remote heated mirrors, and inside rearview mirror with map light.

Dual Removable Roof Panels (coupe) (C2L)

• Included both a tinted, transparent glass top and a painted top.

Removable Roof Panels, blue tint (coupe) (24S)

• Blue tinted removable glass top.

Removable Roof Panels, bronze tint (coupe) (64S)

• Bronze tinted removable glass top.

Electronic Air Conditioning Control (C68)

• Air conditioning system electronic control unit.
• Arrived late in the model year as an option for the 1986 Corvette.

Two Tone Paint (coupe) (D84)

• Optional two-tone paint scheme (available on coupes only.)
• Options included Silver/Grey, Light Blue/Medium Blue, and Light Bronze/Dark Bronze.

Delco-Belstein Shock Absorbers (FG3)

• Gas shock absorbers with valving revised for improved ride.
• The FG3 option offered the Z51’s upgraded shocks without buying the full Z51 suspension package.
• A joint venture between AC-Delco and premium shock manufacturer Bilstein, these stiffer shocks offered a firmer ride and improved handling characteristics.

Performance Axle Ratio (G92)

• Optional performance axle ratio of 3.07:1.
• Was only offered when the Corvette was ordered with an automatic transmission.
• The actual “Performance Axle Ratio” varied from year to year. The G92 Option was available when ordering either the Corvette or the Camaro throughout the 1980’s and early ’90’s.

Engine Oil Cooler (KC4)

• Internal cooler used to cool internal components of the automobile’s internal combustion engine.

Cruise Control (K34)

• Automatic electric cruise control with “resume” and “accelerate” options.

4-Speed Manual Transmission (MM4)

• Optional manual transmission that was offered as a zero dollar upgrade.
• A “4+3”, 4 speed manual transmission that was originally developed and built by Doug Nash Company.
• The “4+3” transmission had overdrives in the top three gears for improved fuel economy.
• In 1986, the 4+3 Manual Transmission came with a new, heavy duty 8.5 inch ring differential.
• The manual transmission overdrive selector button was moved from the console to the shift knob itself.
• Rear axle gear ratios for manual transmission models was 3.07:1.

California Emission Requirements (NN5)

• Revised emission/exhaust components to meet California Emission standards.

Radio Delete (UL5)

• Optional removal of any stereo components from the Corvette.

AM-FM Stereo Cassette (UM6)

• Electronically tuned stereo radio with cassette.

Stereo System, Delco-Bose (UU8)

• Delco Bose AM/FM stereo radio with cassette.

Heavy-Duty Radiator (V01)

• Optional, three (3) core aluminum radiator.
• Includes larger diameter transmission cooler.

Performance Handling Package (coupe) (Z51)

• Heavy Duty Steering and Suspension Upgrade for Improved Handling.
• Included heavy-duty front and rear springs, shock absorbers, stabilizer bars and bushings, fast steering ratio, engine oil cooler, extra radiator fan (pusher), P255 / 50VR16 tires and directional alloy wheels (16 x 8.5 (front) and 16 x 9.5 (rear)).
• Suspension rates were lowered in 1985 as a result of harsh ride criticisms from the previous model year.
• Springs for the base suspension were softer by 26% in front and 25% in the rear. Springs included in the Z51 option were 16% softer in the front and 25% softer in the rear.
• To compensate for the spring change, larger diameter stabilizer bars were included with Z51 equipped models.

Rear Window + Side Mirror Defoggers (coupe) (Z6A)

• Components equipped with heating elements (wire) for defogging.
• The C4 Corvette used vertically run wire through it’s rear window to achieve proper and timely defogging.

Malcolm Konner Special Edition (coupe) (4001ZA)

• Custom Corvette honoring Malcolm Konner.
• Malcolm Konner founded the New Jersey Chevrolet dealership.and this special edition Corvette was built to commemorate his commitment to the sales of Chevrolet automobiles.
• This is the only time that General Motors has ever offered a commemorative edition Corvette paying tribute to one of it’s dealers.
• Each Corvette had special two-tone paint schemes – Silver Beige over Black, coded “spec.”
• All Malcolm Konner Corvettes were coupes – twenty included manual transmissions, thirty included automatic.
• All had graphite leather interiors.
• The first Calloway Corvette was built from a Malcolm Konner Special Edition Corvette.
• Konner Corvettes were not built in sequence and serial numbers ranged from 1G1YY0781G5108043 to 1G1YY0782G5108343.

1986 Corvette Recalls

Recall 06e043000

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: Honeywell International, Inc.
Mfr’s Report Date: May 19, 2006
Nhtsa Campaign Id Number: 06e043000 N/a
Nhtsa Action Number: N/a
Component: Fuel System, Gasoline
Potential Number Of Units Affected: 88303

Summary

Certain Replacement Fuel Filters, Fram Brand Name P/n G3727, With Date Codes X52911 Through X60801 Sequentially Or X600141 And A Mexico Country Or Origin Marking On The Fuel Filter Housing Manufactured From October 18, 2005, Through March 21, 2006, Sold For Use On The Vehicles Listed Above And On Certain School Buses. (To See The School Bus Engine Sizes, Click On “Document Search” And Then “Bus Applications”). The Connector On The Fuel Filter Was Not Manufactured To Honeywell’s Specification. As A Result, The O-ring May Not Seat Correctly On The Fuel Line.

Consequence

This Condition May Cause An Inadequate Seal At The Connection, Potentially Leading To A Fuel Leak. In The Presence Of An Ignition Source, A Fire Could Occur.

Remedy

Honeywell Will Notify Owners And Replace The Fuel Filters Free Of Charge. The Recall Began On October 18, 2006. Owners May Contact Fram Customer Service At 1-800-890-2075 (Option 1).

Notes

This Recall Only Pertains To Aftermarket Fram Fuel Filters And Has No Relation To Any Original Equipment Installed On The Vehicles Listed. Customers May Contact The National Highway Traffic Safety Administration’s Vehicle Safety Hotline At 1-888-327-4236 (Tty: 1-800-424-9153); Or Go To http://www.safercar.gov.

Recall 07e088000

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: Honeywell International, Inc.
Mfr’s Report Date: Oct 19, 2007
Nhtsa Campaign Id Number: 07e088000
Nhtsa Action Number: N/a
Component: Equipment
Potential Number Of Units Affected: 121680

Summary

Certain Honeywell Fram Racing Brand Hp4 And Hp8 Oil Filters That Were Manufactured From May 25, 2006, Through September 14, 2007, And Sold For Use As Replacement Equipment For Vehicles List Above. The Affected Filters Are Marked With A Date Code A61451 Through A72571 Sequentially. The Date Code And Part Number Appear On The Filter Housing. Fram Racing Hp4 And Hp8 Oil Filters Not Bearing A Date Code In This Range Are Not Affected By This Recall. The Gasket Of The Oil Filter Becomes More Pliable Under High Temperatures And Pressures.

Consequence

This Condition May Cause Inadequate Sealing And Loss Of Engine Oil, Possibly Resulting In A Fire.

Remedy

Honeywell Will Replace The Affected Oil Filters Free Of Charge. The Recall Began During November 2007. Owners Can Contact Fram Customer Service Toll-free At 1-800-890-2075.

Notes

Customers May Contact The National Highway Traffic Safety Administration’s Vehicle Safety Hotline At 1-888-327-4236 (Tty: 1-800-424-9153); Or Go To http://www.safercar.gov.

Recall 86v056000

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: General Motors Corp.
Mfr’s Report Date: Apr 22, 1986
Nhtsa Campaign Id Number: 86v056000 N/a
Nhtsa Action Number: N/a
Component: Exterior Lighting:headlights:switch
Potential Number Of Units Affected: 93317

Summary

The Push-pull Headlight Switch May Have Electrical Contacts Which Allow An Intermittent Headlight Circuit Causing Headlight To Flicker Or Suddenly Go Out. Consequence Of Defect: Sudden Loss Of The Headlights Under Severe Weather Or Nighttime Driving Conditions Could Reduce Driver Visibility Which Might Result In A Vehicle Crash Without Prior Warning. Note: Also, See Nhtsa Campaign Number 86v131000.

Consequence

Remedy

Replace Headlight Switch As Necessary.

Notes

System: Headlight Switch. Vehicle Description: Passenger Cars, Trucks And Vans.

Recall 86v120000

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: General Motors Corp.
Mfr’s Report Date: Aug 22, 1986
Nhtsa Campaign Id Number: 86v120000 N/a
Nhtsa Action Number: N/a
Component: Service Brakes, Hydraulic:foundation Components:master Cylinder
Potential Number Of Units Affected: 18223

Summary

Severe And Unusual Braking Conditions May Cause Damage To The Brake Master Cylinder Center Valve. Consequence Of Defect: If Sufficient Damage Occurs, Loss Of Front Brakes May Occur With Increased Pedal Travel And Reduced Braking Ability. The Reduction Of Braking Ability At A Time When Minimum Stopping Distance Is Required Could Result In A Vehicle Crash Without Prior Warning.

Consequence

Remedy

New Master Cylinder Center Valve And Related Parts Will Be Installed.

Notes

System: Brakes/master Cylinder. Vehicle Description: Passenger Cars.

Recall 06e043000

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: Honeywell International, Inc.
Mfr’s Report Date: May 19, 2006
Nhtsa Campaign Id Number: 06e043000
Nhtsa Action Number: N/a
Component: Fuel System, Gasoline
Potential Number Of Units Affected: 88303

Summary

Certain Replacement Fuel Filters, Fram Brand Name P/n G3727, With Date Codes X52911 Through X60801 Sequentially Or X600141 And A Mexico Country Or Origin Marking On The Fuel Filter Housing Manufactured From October 18, 2005, Through March 21, 2006, Sold For Use On The Vehicles Listed Above And On Certain School Buses. (To See The School Bus Engine Sizes, Click On “Document Search” And Then “Bus Applications”). The Connector On The Fuel Filter Was Not Manufactured To Honeywell’s Specification. As A Result, The O-ring May Not Seat Correctly On The Fuel Line.

Consequence

This Condition May Cause An Inadequate Seal At The Connection, Potentially Leading To A Fuel Leak. In The Presence Of An Ignition Source, A Fire Could Occur.

Remedy

Honeywell Will Notify Owners And Replace The Fuel Filters Free Of Charge. The Recall Began On October 18, 2006. Owners May Contact Fram Customer Service At 1-800-890-2075 (Option 1).

Notes

This Recall Only Pertains To Aftermarket Fram Fuel Filters And Has No Relation To Any Original Equipment Installed On The Vehicles Listed. Customers May Contact The National Highway Traffic Safety Administration’s Vehicle Safety Hotline At 1-888-327-4236 (Tty: 1-800-424-9153); Or Go To http://www.safercar.gov

Recall 07e088000

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: Honeywell International, Inc.
Mfr’s Report Date: Oct 19, 2007
Nhtsa Campaign Id Number: 07e088000 N/a
Nhtsa Action Number: N/a
Component: Equipment
Potential Number Of Units Affected: 121680

Summary

Certain Honeywell Fram Racing Brand Hp4 And Hp8 Oil Filters That Were Manufactured From May 25, 2006, Through September 14, 2007, And Sold For Use As Replacement Equipment For Vehicles List Above. The Affected Filters Are Marked With A Date Code A61451 Through A72571 Sequentially. The Date Code And Part Number Appear On The Filter Housing. Fram Racing Hp4 And Hp8 Oil Filters Not Bearing A Date Code In This Range Are Not Affected By This Recall. The Gasket Of The Oil Filter Becomes More Pliable Under High Temperatures And Pressures.

Consequence

This Condition May Cause Inadequate Sealing And Loss Of Engine Oil, Possibly Resulting In A Fire.

Remedy

Honeywell Will Replace The Affected Oil Filters Free Of Charge. The Recall Began During November 2007. Owners Can Contact Fram Customer Service Toll-free At 1-800-890-2075.

Notes

Customers May Contact The National Highway Traffic Safety Administration’s Vehicle Safety Hotline At 1-888-327-4236 (Tty: 1-800-424-9153); Or Go To http://www.safercar.gov.

Recall 86v056000

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: General Motors Corp.
Mfr’s Report Date: Apr 22, 1986
Nhtsa Campaign Id Number: 86v056000 N/a
Nhtsa Action Number: N/a
Component: Exterior Lighting:headlights:switch
Potential Number Of Units Affected: 93317

Summary

The Push-pull Headlight Switch May Have Electrical Contacts Which Allow An Intermittent Headlight Circuit Causing Headlight To Flicker Or Suddenly Go Out. Consequence Of Defect: Sudden Loss Of The Headlights Under Severe Weather Or Nighttime Driving Conditions Could Reduce Driver Visibility Which Might Result In A Vehicle Crash Without Prior Warning. Note: Also, See Nhtsa Campaign Number 86v131000.

Consequence

Remedy

Replace Headlight Switch As Necessary.

Notes

System: Headlight Switch. Vehicle Description: Passenger Cars, Trucks And Vans.

Recall 86v120000

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: General Motors Corp.
Mfr’s Report Date: Aug 22, 1986
Nhtsa Campaign Id Number: 86v120000 N/a
Nhtsa Action Number: N/a
Component: Service Brakes, Hydraulic:foundation Components:master Cylinder
Potential Number Of Units Affected: 18223

Summary

Severe And Unusual Braking Conditions May Cause Damage To The Brake Master Cylinder Center Valve. Consequence Of Defect: If Sufficient Damage Occurs, Loss Of Front Brakes May Occur With Increased Pedal Travel And Reduced Braking Ability. The Reduction Of Braking Ability At A Time When Minimum Stopping Distance Is Required Could Result In A Vehicle Crash Without Prior Warning.

Consequence
Remedy

New Master Cylinder Center Valve And Related Parts Will Be Installed.

Notes

System: Brakes/master Cylinder. Vehicle Description: Passenger Cars.

Recall 91v143000 Ea90033

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: General Motors Corp.
Mfr’s Report Date: Aug 26, 1991
Nhtsa Campaign Id Number: 91v143000 Ea90033
Nhtsa Action Number: Ea90033
Component: Seat Belts:front:anchorage
Potential Number Of Units Affected: 231833

Summary

Under Certain Vehicle Operations And Occupant Usage Conditions, The Safety Belts Can Lockup Or Jam In The Safety Belt Retractor.

Consequence

If Lockup Occurs, It Is Impossible To Pull Belt Out Of the Retractor. The Occupant Of A Seat With An Unusable Safety Belt Is subject To Increased Risk Of Injury Or Death In The Event Of A Sudden Stop Or accident.

Remedy

Replace The Safety Belts If The Lockup Occurs.

Notes

System: Safety Belts.vehicle Description: Passenger Cars.

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1986 Corvette Service Bulletins

Service Bulletin 01697

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: General Motors Corp.
Service Bulletin Number: 01697
Date of Bulletin: Jan 01, 2004
NHTSA Item Number: 10006297

Component

Equipment: Electrical

Summary

No serial data communications using the tech 1 with a 1986 or newer Camaro, Firebird or Corvette with a 5.0 or 5.7 litre engine. Sit bulletin 1450640.

Service Bulletin 9313110

Make: Chevrolet
Model: Corvette
Model Year: 1986
Manufacturer: General Motors Corp.
Service Bulletin Number: 9313110
Date of Bulletin: Mar 01, 1993
NHTSA Item Number: 39547

Component

Visibility: Glass, Side/Rear

Summary

Rear lift window hard to open/hinge loose to glass.

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1986 Corvette Common Issues

The following list of common issues is intended for individual reference only, and may not reflect the specific issues of every 1986 Corvette. This information comes from a variety of sources including the NHTSA Defects Reports pages. While the intent of this page is to identify the common issues pertaining to the 1986 Corvette, it is not an all-inclusive list and should be used for reference only.

Mechanical Issues

Engine

Engine is known to seize when water enters the engine air intake system. The air cleaner (located directly in the nose of the engine) allows water to flow into the cylinder chamber which causes engine lock up. Water can be pulled into the air intake system by the movement of air from the radiator fan when it is collected on the front air spoiler.

Engine stalls, surges and runs rough as the direct result of malfunctioning computer control module.

Fuel Injection

Fuel injectors are a common issue on early model C4 Corvettes. The most common failure of the injectors is an electrical short in the injector itself, which causes the entire injector bank to malfunction.
Fuel injection failure can be severe enough to prevent Corvette from starting.

Intake Manifolds

The intake manifolds are known to develop leaks. The lower end of the intake manifolds tend to leak both coolant and oil. The engine oil leaks most commonly occur on the flat side of the manifold while coolant tends to leak most heavily around the corners.

Transmission (Automatic)

The transmission overdrive engages erratically due to a faulty control assembly. This condition can prevent the transmission from shifting into higher gears.
Automatic transmissions exhibit difficult/hard shifting.

Brakes

Anti-lock braking system known to fail, causing brakes to lock up. The ABS system can also cause erratic pulsating in the braking system, even when brake pedal is fully depressed.

ABS relays and sensors are known to corrode due to moisture damage in a sealed compartment, causing loss of braking power.

The brake master cylinder are known to leak, resulting in loss of fluid which can cause brake fade/failure.
The front computer controlled power disc brakes are known to fail.

Electrical Issues

VATS (Vehicle Anti-Theft System)

General Motors started installing the VATS system in Corvettes in 1986. VATS (or Vehicle Anti-Theft System) utilizes a special ignition key that contains a resistor pellet. This special “pellet” utilizes one of 15 different resistances that, in connection with the key itself, serves to secure the vehicle. When current passes thru a key with the correct resistor pellet, it sends a signal to the ECM, and then closes the starter circuit. The ECM will not allow the fuel injection or starter systems to operate without a signal response from the VATS module. Since VATS is not connected to the alarm system, it is active even if if the car is left unlocked or the alarm system is defeated.

The main problem with the VATS system occurred primarily during the first three years of its production (1986-1989). The issue was with the material that the contacts of both the ignition key and ignition cylinder were made of. This material was prone to premature wear which resulted in poor contact, an incorrect resistance being seen by the decoder module, and consequently a “no-start” condition.

In July 1988, a GM Technical Service Bulletin (number 88-292) was issued. This TSB included the part number for a new ignition cylinder that has better contacts. Keys were also updated that were slightly longer and included better contacts. These corrections virtually eliminated VATS problems caused by internal connection issues.

Fuel Pump

Fuel pumps are known to generate excessive whining/noise. New design is known to fail prematurely. Noise is particularly notable during acceleration.

Neutral Safety Switch

The Neutral Safety Switch is known to malfunction, allowing the Corvette to be started while in reverse.

Anti-Theft System

Anti-theft system puts the ignition into a no-start condition.

Exterior Issues

Headlights

Headlight motors are known to fail, preventing headlights from engaging/disengaging.

Fiberglass Body/Seals

There are a number of fiberglass body panel components that are known to fail. These include faulty hood seals, leaky roof seals and deteriorating firewalls.

Door/Door Hinges

Both the driver and passenger doors are known to exhibit erratic vibration.

Interior Issues

Instrument Lights/Dashboard

The instrument panel are known to flicker on and off, especially while the car is idling.

The fuel gauge is known to fluctuate by as much as 1/4 of a tank, resulting in possible stall conditions from engine fuel starvation.

Shoulder Harness/Driver & Passenger Restraint System

Restraint system is known to fail during impact/crash conditions. The shoulder harness fails when the anchoring system breaks, thereby eliminating effectiveness of restraint system.

The seat belt retractors are known to lock-up which prevents the seat belts from being extendable/usable.

A second, similar condition causes the seat-belt/shoulder restraint system locks during vehicle operation, preventing the driver from being able to move properly while driving.

Seatbelts can not be buckled/unbuckled when driver seat is certain positions.

Door Locks & Latches

Automatic door locking system in car is known to fail, preventing access into/out of the car.

Other Issues

A number of cases have been reported that state that the 1986 Corvette has erratic acceleration issues. In several instances, erratic acceleration is unexplained. It has resulted in loss of control and vehicle damage.

1986 Corvette Maintenance Schedule

Maintenance Schedule

Schedule 1

Follow Schedule 1 if your car is mainly operated under one or more of the following conditions:.

• When most trips are less than 4 miles (6 kilometers)
• When most trips are less than 10 miles (16 kilometers) and outside temperatures remain below freezing.
• Idling for extended periods and/or low-speed operation such as found in delivery, police, rental or taxi operation.
• Towing a trailer.
• Operating in dusty areas.

Schedule 2

Follow Schedule 2 only if none of the driving conditions specified in Schedule 1 apply

Additional Maintenance and Lubrication

While Operating Your Vehicle

Automatic Transmission Shift Indicator Position – Make sure the indicator points to the gear chosen.

Horn Operation – Blow the horn occasionally to make sure it works.  Check all button locations.

Brake System Operation – Be alert to abnormal sounds, increased brake pedal travel or repeated pulling to one side when braking.  Also, if a brake warning light comes on or flashes, or the anti-lock (if equipped) comes on or remains on, something may be wrong with part of the braking system.  Have it inspected and repaired at once.

Exhaust System Operation – Be alert to any changes in the sound of the system or any smell of fumes.  These are signs the system may be leaking or overheating.  Have it inspected and repaired at once.  Also see “Engine Exhaust Gas Caution (Carbon Monoxide)” and “Catalytic Converter” in your Owner’s Manual.

Tire and Wheel Operation – Be alert to a vibration of the steering wheel or seat at normal highway speeds.  This may mean a wheel balance is needed.  Also, a pull right or left on a straight, level road may show the need for a tire pressure adjustment or wheel alignment.

Steering System Operation – Be alert to changes in steering action.  An inspection is needed when the steering wheel is harder to turn or has too much free play or if unusual sounds are noted when turning or parking.

Headlight Aim Operation – Take note of light pattern occasionally.  If beam aim doesn’t look right, headlights should be aligned.

At Each Fuel Fill:

Engine Oil Level Check – Check engine oil level and add if necessary.  See your Owner’s Manual for further details. NOTE:  A large loss of oil in this system may indicate a problem.  Have it inspected and repaired at once.

Engine Coolant Level and Condition –  Check engine coolant level in coolant reservoir tank and add if necessary.  Replace if dirty or rusty.  See your Owner’s Manual for further details.  NOTE: A large loss in this system may indicate a problem.  Have it inspected and repaired at once.

Windshield Washer Fluid Level Check – Check washer fluid level in container and add if necessary.

At Least Monthly:

Tire Pressure Check – Keep pressures as shown on Tire Placard on the driver’s door (include spare unless it is a stowaway).  Pressure should be checked when tires are “cold”.

Light Operation Check – Check operation of license plate light, side-marker lights, headlights including high beams, parking lights, taillights, brake lights, turn signals, backup lights, instrument panel and interior lights and hazard warning flashers.

Fluid Leak Check – After the car has been parked for a while, inspect the surface beneath the car for water, oil, fuel or other fluids.  Water dripping from the air conditioning system after use is normal.  If you notice fuel leaks or fumes, the cause should be found and corrected at once.

At Least Twice A Year (for example: Every Spring and Fall):

Power Steering Pump Fluid Level Check – Check power steering pump fluid level in accordance with Owner’s Manual instructions and keep at proper level.  NOTE: A large loss in this system may indicate a problem.  Have it inspected and repaired at once.

Brake Master Cylinder Reservoir Fluid Level Check – Check fluid and keep at proper level.  NOTE: A low fluid level can indicate worn disc brake pads which may need to be serviced.  NOTE: A large loss in this system may indicate a problem.  Have it inspected and repaired at once.

Clutch System Service – Manual Transmissions – For cars equipped with hydraulic clutch systems, check the reservoir fluid level and add fluid as required.  All others, check clutch pedal free travel and adjust as necessary.  See your Owner’s Manual for further detail.  NOTE:  A large loss in this system may indicate a problem.  Have it inspected and repaired at once.

Each Time Oil Is Changed:

Automatic and Manual Transmission/Transaxle Fluid Level Check – Check transmission/transaxle fluid level and add as required.  If equipped with manual transmission – check fluid in the overdrive unit and add as required.  NOTE: A large loss in this system may indicate a problem.  Have it inspected and repaired at once.

Tire and Wheel Inspection and Rotation – Check tires for abnormal wear or damage.  Also, check for damaged wheels.  To equalize tire wear and obtain maximum tire life, it is suggested that tires be rotated at 7,500 miles (12,500 kilometers) followed by 15,000 miles (25,000 kilometers) thereafter.  See “Tires” in owners manual for further information.

Brake Systems Inspection – For convenience, the following should be done when wheels are removed for rotation: Inspect lines and hoses for proper hookup, binding, leaks, cracks, chafing, etc.  Inspect disc brake pads for wear and rotors for surface condition.  Also inspect drum brake linings for wear and cracks (if applicable).  Inspect other brake parts, including drums, wheel cylinders, parking brake, etc. at the same time.  Check parking brake adjustment. INSPECT BRAKES MORE OFTEN IF DRIVING HABITS OR CONDITIONS RESULT IN FREQUENT BRAKING.

Steering, Suspension and Front Drive Axle Boot and Seal Inspection – Inspect front and rear suspension and steering system for damaged, loose or missing parts, signs of wear or lack of lubrication.  Inspect power steering lines and hoses for proper hookup, binding, leaks, cracks, chafing, etc.  (On cars equipped with manual steering gear, check for seal leakage.)  Replace seals if necessary.

Exhaust System Inspection – Inspect complete system.  Inspect boy near the exhaust system.  Look for broken, damaged, missing or out-of-position parts as well as open seams, holes, loose connections or other conditions which could cause a heat build up in the floor pan or could let exhaust fumes seep into the trunk or passenger compartment.

Throttle Linkage Inspection – Inspect for interference, binding , damaged or missing parts.

Engine Drive Belts Inspection – Inspect all belts for cracks, fraying and wear.  Adjust or replace as needed.

Rear Axle Service – Check gear lubricant level and add if needed.  Cars equipped with limited-slip differential should have gear lubricant and any required additives drained and refilled at 7,500 miles (12,500 kilometers).  See your Owner’s Manual.  IF YOU USE YOUR CAR TO PULL A TRAILER, CHANGE GEAR LUBRICANT EVERY 7,500 MILES (12,500 KILOMETERS).  NOTE: A large loss in this system may indicate a problem.  Have it inspected and repaired at once.

Power Antenna – Clean and then lubricate power antenna mast.  The proper lubricant should be used.

At Least Once A Year:

Lap and Shoulder Belts Condition and Operation – Inspect belt system, including webbing, buckles, latch plates, retractors, guide loops and anchors.

Seatback Latch and Recliner Operation – Be sure seatbacks latch using mechanical latches.  Make sure the recliner is holding by pushing and pulling on the top of the seatback while it is reclined.  See your Owner’s Manual for seat operating information.

Spare Tire and Jack Storage – Be alert to rattles in rear of car.  Make sure the spare tire, all jacking equipment, any tire inflator and any covers or doors are securely stowed at all times.  Oil jack ratchet or screw mechanism after each use.

Key Lock Service – Lubricate key lock cylinder at least annually.

Body Lubrication Service – Lubricate all body door hinges including the tailgate (if equipped).  Also lubricate the body hood, fuel door and rear compartment hinges and latches including interior glove box and counsel doors, and any folding seat hardware.

Starter Safety Switch Operation – CAUTION: Before performing the following safety switch check, be sure to have enough room around the car.  Then, firmly apply both the parking brake (see your Owner’s Manual for procedure) and the regular brakes.  Do not use the accelerator pedal.  If the engine starts, be ready to turn off the ignition promptly.  Take these precautions because the car could possibly move without warning and possibly cause personal injury or property damage.  On automatic transmission cars, try to start the engine in each gear.  The starter should crank only in “Park” or “Neutral”.  On manual transmission cars, place the shift lever in “Neutral”, push the clutch halfway and try to start.  The starter should crank only when the clutch is fully depressed.

Steering Column Lock Operation – While parked, try to turn key to “Lock” in each gear range.  The key should turn to “Lock” only when gear is in “Park” on automatic or “Reverse” on manual transmissions.  On cars with key release lever, try to turn key to “Lock” without depressing the lever.  The key should turn to “Lock” only with the key lever depressed.  On all vehicles, the key should come out only in “Lock”.

Parking Brake an Transmission “Park” Mechanism Operation – CAUTION: Before checking the holding ability of the parking brake and automatic transmission “Park” mechanism, park on a fairly steep hill with enough room for movement in the downhill direction.  To reduce the risk of personal injury or property damage, be prepared to apply the regular brakes promptly if the car begins to move. To check the parking brake, with the engine running and the transmission in “Neutral”, slowly remove foot pressure from the regular brake pedal (until the car is only held by the parking brake.)  To check the automatic transmission “Park” mechanism holding ability, release all brakes after shifting the transmission to “Park”.

Underbody Flushing – At least every spring, flush from the underbody with plain water any corrosive materials used for ice and snow removal and dust control.  Take care to thoroughly clean any areas where mud and other debris can collect.  Sediment packed in closed areas of the vehicle should be loosened before being flushed.

Engine Cooling System Service – Inspect coolant and freeze protection.  If dirty or rusty, drain, flush and refill with new coolant.  Keep coolant at the proper mixture as specified in your Owner’s Manual.  This provides proper freeze protection, corrosion inhibitor level and engine operating temperature.  Inspect hoses and replace if cracked, swollen or deteriorated.  Tighten hose clamps.  Clean outside of radiator and air conditioning condenser.  Wash radiator filler can and neck.  To help ensure proper operation, a pressure test of both the cooling system and cap is also recommended.

1986 Corvette DIY Service Guide

Battery & Charging

Inspection & Replacement of Battery, Factory Battery Specifications, Replacement of Alternator/Generator. Learn more.

Ignition & Tune Up

How to Replace the Ignition Coil, How to Replace the Ignition Switch, Inspection & Replacement of Sparkplug Wires, Inspection & Replacement of Cap & Rotor, How to Replace Sparkplugs, Engine Firing Order, Engine Timing.

Belt & Tensioner

How to Replace Drive Belt, Common Indicators of a Defective Belt, Replacement of Belt Tensioner. Learn more.

Relays/Sensors

Location & Replacement of: Mass Air Flow Sensor, Oil Pressure Sensor, Engine Temperature Sensor, Ambient Air Temperature Sensor, Fuel Pressure Sensor, Oxygen Sensors (Upstream/Downstream).

Braking

Inspection & Replacement of Brake Pads, Inspection & Replacement of Front/Rear Brake Rotors, How to Replace Brake Calipers, How to Bleed Brakes, Inspection & Replacement of Master Cylinder. Learn more.

Suspension & Steering

Inspection & Replacement of Upper/Lower Ball Joints, How to Replace Control Arm Bushings, How to Replace the Power Steering Pump, Inspection & Replacement of Front Shocks/Struts, Inspection & Replacement of Rear Shocks/Struts, How to Replace Inner & Outer Tie Rod Ends.

Engine Cooling 

Inspection & Replacement of Radiator, How to Replace the Heater Core, Inspection & Replacement of Upper/Lower Radiator Hoses, How to Flush the Cooling System, How to Replace the Water Pump, How to Replace a Thermostat. Learn more.

Starter/External Engine

How to Replace the Starter Motor, How to Replace the Starter Solenoid, How to Replace the Drive Belt Tensioner, How to Replace the Idler Pulley, Location of, Inspection & Replacement of Engine (Motor) Mounts, How to Replace the Oil Pan Gasket, How to Replace the Oil Pump

Emissions

Location of, Inspection & Replacement of Oxygen Sensors (Upstream/Downstream), How to Replace the EGR Valve, How to Replace the Smog Pump

Filters/PCV Valves

Location & Replacement of the Following Filters: Oil Filter, Fuel Filter, Transmission Filter, PCV Valve

Transmission & Clutches

How to Change the Transmission Filter (Automatic Transmission), How to Replace a Clutch (Manual Transmission)

1986 Corvette Dealers Sales Brochure

Download this 1986 Corvette Dealers Sales Brochure for a quick look at the features of the car.

Download 1986 Corvette Dealers Sales Brochure

Source Material:

1. The Pocket Book of the Corvette: The Definitive Guide to the All American Sports Car – Copyright 2003, Barnes & Noble
2. CORVETTE: Sports Car Superstar – Copyright 2005, PIL – Publications International, Ltd.
3. Corvette Black Book – Copyright 2009, Michael Bruce Associates, Inc.
4. “The Corvette Story: The 1986 Corvette” – http://www.web-cars.com/corvette/1985.php
5. The Complete Book of Corvette, Every Model Since 1953 – Copyright 2005, Mike Mueller – MBI Publishing