The early eighties was a period of technological firsts. Apple Computers introduced the Macintosh computer. NASA introduced Columbia, the first of a fleet of reusable launch vehicles which would come to be known as the “Space Shuttle”. The first laptop computer is marketed by the Tandy Corporation. In short, Americans were moving into a world that was growing increasingly interlaced with technology. They were clamoring for it – in their offices, in their homes and in their automobiles. General Motors was prepared to answer the technology boom with the introduction of a brand new Corvette.
The 1984 Corvette was unveiled to the public in March, 1983. Although there had been rumors and silent rumblings of a new Corvette for several years prior to it’s unveiling, the arrival of the C4 Corvette was met with overwhelming enthusiasm from both the press and the public. Although the car was a departure from its predecessor in both styling and form, it was still unmistakably a Corvette – although it was definitely a more technologically advanced Corvette than any that had come before it.
Because of its late release (generally, new model year cars are introduced late in the previous year) and the fact that it met all of the 1984 Federal emission requirements, it was decided by Chevrolet’s General Manager, Robert Stempel that the C4 Corvette would bypass the 1983 model year and officially begin production as a 1984 model. Despite much conjecture to the contrary, it is true that General Motors actually began producing the C4 Corvette in 1983. It is rumored that as many as forty-three were built and given unique serial numbers (they would later be re-tagged with new serial numbers that identified the same cars as 1984 model year Corvettes), but were never released for sale in 1983.
Although the 1984 Corvette met the emissions regulations requirements of the day, the development of electronic engine management was still in its infancy. As a result, General Motors engineers were cautious about how much performance output the new small-block 350 engine should really produce. After all, it was widely accepted that increased horsepower resulted in decreased emissions (exhaust air) quality.
Conscious of maintaining the highest possible emissions standards, it was decided early on that, at least for the first model year, the C4’s primary focus would not be horsepower (as was the norm for generations of Corvettes before it) but handling. Many increases to the overall drivability of the Corvette were made, and a special performance handling package – option Z51 – was introduced for the 1984 model year.
While sales began almost immediately after the arrival of the new Chevy Corvette, GM continued to make on-going changes to the car’s final layout and design. These “running changes” were made even after sales began.
The most significant changes that were made to the 1984 Chevy Corvette from the earlier prototype models included an engine-oil cooler that was to be included as part of the standard equipment package.
Additionally, the original fifteen inch wheel/tire combination was deleted, making the sixteen inch wheel/tire combination the only available choice. This change led to an increase in the base price of the C4 Corvette even after model year production had begun.
Another, more interesting change was also made to the interior of the car.
Under the Reagan Administration, it was decided that automobiles should feature a passive restraint system. General Motors suspected that this new administrative mandate would eventually pass into law and so Chevrolet engineers introduced a large, rounded pad that protruded from the passenger side dashboard.
Its sole purpose was to provide additional, passive (meaning that it worked even when the passenger did not consciously choose to utilize it (as with a seatbelt, for example)), passenger crash protection in the event of an accident. Ultimately, the Reagan Administration dropped the restraint proposals, but the pad remained.
Of course, the creation of a new Corvette also meant the introduction of features that provided for greater functionality and ease of operation. The updated design introduced the permanent inclusion of a hatchback. While it’s true that the hatchback feature was included on the 1982 Collectors Edition Corvette, it was decided that the permanent inclusion of a hatchback would provide a greater ease of access to the rear storage/luggage compartment. Similarly, the front hood was re-designed to function as a “clamshell” style cover that made engine and front suspension access far more convenient.
Other changes to the design of the C4 also helped differentiate the new Corvette from all of its predecessors. Prior to the 1984 model, all Corvettes had been built to include a front grill. Since it’s inception in 1953, the Corvette front grill had served as a trademark that was synonymous with Corvette. Of course, in the 30 years that followed, the design of the grill had grown smaller and smaller. At the onset of the 1984 Corvette, it was removed completely. Corvette engineers had developed an undercar ducting system that provided adequate airflow to properly cool the radiator. Replacing the grill was a pair of halogen fog/running lamps which were inspired by the Porsche 928 (and other European sports cars of that era).
Another item that disappeared completely from the C4 Corvette’s design was the existence of actual bumpers on the car. While the new Corvette actually did have bumpers integrated into its design, (which were rated to absorb impact speeds of up to 5 miles per hour), it was done in such a way that they were not differentiated from the rest of the car, giving the car a “bumper-less” appearance.
Still another item of interesting note was the evolution of the hideaway headlights. The C3 Corvette had featured hideaway headlights, but they had been engineered as a flip up design, which meant that the top of the headlight was the same whether it was up or down. The C4 headlight functioned somewhat differently in that the entire headlight assembly rolled outward, the end result of which meant that the headlight cover (when the headlight was recessed) actually became the base of the headlight (when it was exposed and operational.) The primary reason for this change was that while the C3 Corvette’s headlight cover protruded from the top of the headlight (effectively creating drag), concealing the headlight covers provided for greater ease of airflow over and around the headlights, thereby increasing the aerodynamics (even if marginally) of the C4 Corvette
As commercial production of the C4 Corvette began, so did the criticism. Because of the long lead/build time on the 1984 Corvette, General Motors had, perhaps mistakenly, provided many late ’83 model Corvettes to the automotive press for review. Chevrolet engineers invited the automotive media to test the Corvette to the Riverside Parkway as early as December, 1982. These first, regular production Corvettes were being driven – and evaluated – by automobile reviewers all over the country. Initial reviews praised the Corvette for it’s quick acceleration and drivability. They focused on how well it cornered and handled road courses. At the same time, there was significant criticism about how the car treated its occupants. The ride was rough, especially in Corvettes equipped with the Z51 suspension package. While the car was deemed a superior car for the track, it was generally judged as being too harsh-riding for daily driving.
In addition to drivability, other items within the Corvette were met with significant criticism. The interior had earned low marks for excessive exhaust and road noise, for deep door sills (as a result of the unit body frame) that resulted in excessive difficulty climbing into and out of the Corvette, and for the digital dashboard which had been criticized for being difficult to read, especially in sunlight. From its inception, most reviewers pined for a return to the more conventional, user-friendly analog gauges that had been part of the Corvette since the beginning.
Similarly, the 4+3 Overdrive Manual Transmission was met with mixed reviews. First, there was the clunky, high-effort linkage that made stop-and-go driving challenging. Adding to the aggravation was an equally unpleasant high-effort clutch. Perhaps worst of all though was the computer controlled overdrive option. When engaged, the automated override would often try to out-think the driver, making driving tedious and frustrating. Most reviewers agreed that the 4+3 Overdrive Transmission worked best when the manual override option was switched to the “off” position. Ultimately, the 4+3 Overdrive Transmission proved to be unreliable and would also prove to be undesirable to most consumers. As a result, most of the 1984 Corvettes that left the Bowling Green Manufacturing Plant were built with automatic transmissions (a fact that remained true through 1988 when General Motors finally abandoned the 4+3 Overdrive in favor of a more conventional – and functional – manual transmission.)
Even the new body style was not without reproach.
While critics generally agreed that the new design was sleek and sophisticated, many also commented that the new Corvette was, in comparison with the last year of the C3, remarkably restrained.
Some critics even went so far as to criticize the Corvette’s overall lack of bodylines. Where the C3 had the “coke bottle” appearance with its extra wide front and rear hips, the C4 was relatively straight-lined by comparison.
There was, of course, the standard automotive styling that enthusiasts had come to expect of the Corvette: the previously mentioned pop-up headlights, the circular taillights and the wrap around, rear window that was a staple of the late 1982 Corvette.
Despite the lukewarm reviews that began to circulate about the first model year of the C4, the excitement of being able to purchase an all-new Corvette for the first time in 15 years made the 1984 Corvette a quick sellout. In fact, when combined with the extra-long model year, Corvette’s sales reached a total of 51,547 units – which is the second highest total in Corvette history.
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 151547, accounting for each of the 51,547 Corvette Coupes built in 1984.
Each Vehicle Identification Number (VIN) is unique to an individual car.
For all 1984 Corvettes, the Vehicle Identification Number was stamped on a plate on the inner vertical surface of the left windshield pillar visible through the windshield.
1984 Corvette Factory Options
Base Corvette Sport Coupe
Power Driver Seat
Sport Seats, Leather
Base Seats, Leather
Sport Seats, Cloth
Power Door Locks
Removable Transparent Roof Panel
Delco-Bilstein Shock Absorbers
Performance Axle Ratio
4-Speed Manual Transmission
California Emissions Requirements
AM-FM Stereo Cassette
AM-FM Stereo, Citizens Band
Stereo System, Delco-Bose
Heavy Duty Cooling
Performance Handling Package
Pear Window + Side Mirror Defoggers
Base Corvette Roadster (1YY07)
The base price of the 1984 Chevrolet Corvette Coupe without any optional equipment.
The 1984 Corvette was a complete redesign in almost every aspect.
A 350 cubic inch, 205 horsepower engine, 4-speed automatic transmission, removable body-color roof panel, and cloth seats were included in the base price.
Power Driver Seat (AG9)
Optional, six-way, adjustable driver seat.
Sports Seat, Cloth (AQ9)
Special sport seats that featured inflatable lumbar support and power-adjusted side bolsters.
Sport seats were available in cloth (featuring a different material than the base seats.)
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.
Removable Transparent Roof Panel (CC3)
Single piece glass roof panel that provides an “open air” feel while driving.
All 1984 Corvettes were designed with one-piece, lift-off roof panels and rear hatch windows.
At the time, the rear window glass was the largest compound glass ever installed in an American automobile.
The front windshield was slanted at the greatest angle – 64 degrees.
Two Tone Paint (D84)
Optional paint scheme that included the option of three, different, two-tone paint combinations.
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.
It was not available early in the production year.
P255/50VR16 Tire /16″ Wheels (QZD)
A tire/wheel combination that was originally intended as part of the Z51 package.
This 16 inch tire/wheel package was originally intended to be an optional combinations made available to buyers, but was later required for all 1984 Corvette models.
While 15 inch alloy wheels and P215 / 65R15 tires appeared on the dealer order guides, they were not made available on any production C4 Corvettes.
The FG3 option offered the Z51’s upgraded shocks without buying the full Z51 suspension package.
Radio Delete (UL5)
Optional removal of any stereo components from the Corvette.
AM-FM Stereo Cassette (UM6)
Electronically tuned stereo radio with cassette.
AM-FM Stereo, Citizens Band (UN8)
AM/FM stereo system with citizens band radio and hand held transmitter/microphone.
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.
California Emission Requirement (YF5)
Revised emission and exhaust components to meet California Emission standards.
Performance Handling Package (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)).
Rear Window + Side Mirror Defoggers (Z6A)
Components were 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.
1984 Corvette Recalls
Make: Chevrolet Model: Corvette Model Year: 1984 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.
Make: Chevrolet Model: Corvette Model Year: 1984 Manufacturer: General Motors Corp. Mfr’s Report Date: Jul 01, 1983 Nhtsa Campaign Id Number: 83V064000 Nhtsa Action Number: N/a Component: Service Brakes, Hydraulic:foundation Components:disc:caliper Potential Number Of Units Affected: 9197 Summary: Attaching Bolts Were Mistakenly Coated With A Slippery Material During Production. This Material Will Act As A Lubricant And Bolts May Loosen And Eventually Fall Off.
Consequence: Remedy: Dealer Will Install New Caliper Bracket Bolts Free Of Charge. Notes: Vehicle Description: Passenger Vehicles.system: Service Brakes; Front Brake Caliper Bracket To Steering Knuckle attaching Bolt.consequences Of Defect: The Front Brake Assembly Could Become Partially separated From The Knuckle Assembly, Causing The Wheel To Lock. Loss Of Vehicle control Without Prior Warning And An Accident Could Result.
Make: Chevrolet Model: Corvette Model Year: 1984 Manufacturer: General Motors Corp. Mfr’s Report Date: Aug 23, 1983 Nhtsa Campaign Id Number: 83v081000 Nhtsa Action Number: N/a Component: Electrical System:Battery:cables Potential Number Of Units Affected: 11909 Summary: The Insulation Of The Battery Cable, Because Of Its Position, Rubs Against Some Of The Engine Wiring Components. Once The Insulation Is Worn Through, The Battery Could Rapidly Discharge. Consequence: Remedy: Dealer Will Install A New Engine Harness Retainer Bracket, Protective Conduit, Cable Clips, A Cable Tie Strap And Will Reposition The Terminals On The Ground Stud On All Involved Vehicles. Notes: Vehicle Description: Passenger Vehicles.system: Electrical; Battery Cable Insulation.consequences Of Defect: The Headlights Would Cease To Function, Due To Loss Of battery Power; Driving At Night, In Fog Or Other Severe Weather Conditions could Result In An Accident.
Make: Chevrolet Model: Corvette Model Year: 1984 Manufacturer: General Motors Corp. Mfr’s Report Date: Mar 12, 1985 Nhtsa Campaign Id Number: 85v029000 N/a Nhtsa Action Number: N/a Component: Vehicle Speed Control Potential Number Of Units Affected: 47081 Summary: The Cruise Control Vacuum Solenoid Valves May Malfunction At Any Time The Engine Is Running And The Cruise Control Is Engaged And Cause Unexpected Engine Acceleration. Consequence Of Defect: Loss Of Accelerator Control Could Result In A Vehicle Crash Without Prior Warning. Consequence: Remedy: Install And Relocate A New Cruise Control Servo Assembly. Notes: Vehicle Description: Passenger Cars Equipped With Rpo K34 Cruise Control. System: Cruise Control.
Make: Chevrolet Model: Corvette Model Year: 1984 Manufacturer: General Motors Corp. Mfr’s Report Date: Sep 18, 1985 Nhtsa Campaign Id Number: 85v118000 Nhtsa Action Number: N/a Component: Power Train:driveline:differential Unit Potential Number Of Units Affected: 44342 Summary: Cars May Lose The Wire Snap Rings That Hold The Differential Cross Shaft In Position In The Rear Axle Differential Case Assembly, Allowing The Shaft To Move. Consequence Of Defect: The Cross Shaft Movement Could Cause The Shaft To Contact The Carrier Or Pinion Teeth, Possibly Locking Up The Rear Wheels And Result In A Crash Without Prior Warning. Consequence: Remedy: Install A Rear Axle Differential Cross Shaft Retaining Kit. Notes: System: Rear Axle. Vehicle Description: Passenger Cars With 3.07 Axle And F41 Suspension.
Recall 91v143000 Ea90033
Make: Chevrolet Model: Corvette Model Year: 1984 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.
1984 Corvette Service Bulletins
Service Bulletin 9313110
Make: Chevrolet Model: Corvette Model Year: 1985 Manufacturer: General Motors Corp. Service Bulletin Number: 9313110 Date of Bulletin: Mar 01, 1993 NHTSA Item Number: 39547 Component: Visibility – Glass, Side/Rear
1984 Corvette Common Issues
The following list of common issues is intended for individual reference only, and may not reflect the specific issues of every 1985 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 1985 Corvette, it is not an all-inclusive list and should be used for reference only.
The engine may shut off after it reaches normal operating temperature. There are several possible items that could cause this. They include:
Bad Oil Pressure Switch – If this switch fails/does not detect oil pressure, it will cause the engine to shut off.
A Bad Distributor Module – the module may overheat, causing it to fail.
Fuel Pump Relay – A bad relay will cause the pump motor in the fuel tank to fail, causing ignition failure.
The Throttle Position Sensor.
Mass Air Flow Sensor
For both the Mass Air Flow Sensor and the Throttle Position Sensor, it is important to monitor voltage across/to each of these sensors. Improper voltage can adversely impact how these sensors operate and may cause engine ignition failure.
If the engine starts but will not continue running/idle, there are other items that may need to be considered as well. In many instances, a rough idle/stalling engine may be caused by dirty/damaged fuel injectors. Cleaning (and, if necessary, replacing) the fuel injectors may resolve this issue. Carbon build up in the throttle body can also cause the same symptoms. Cleaning the throttle body in conjunction with the injectors will eliminate many rough idle conditions.
If the engine will turn over but simply won’t run, the most common cause of this issue is a failed Computer/PROM. Located under the dashboard, the PROM controls the ignition/drive functions of the engine. Replacement PROMS are available from most aftermarket vendors.
Additionally, the L98 engines had problems maintaining idle due to the design and use of the IAC ( Idle Air Control Valve). To compensate for this issue, the idle speed needs to be adjusted to a minimum air rate of 500rpm.
The rear of the intake manifold is known to leak oil.
Erratic shifting is known to be an issue in the automatic transmission. A properly operating transmission should shift smoothly no matter what load is put on it.
The manual transmission is known to exhibit synchronizer problems. The shift points should transition smoothly with no need to “double clutch” or “coach” the transmission into changing gears.
The Dana Rear Axle/Differential is known to make a fair amount of noise.
Headlight Drive Motors
The drive motors that rotate the headlight assembly are known to fail. The headlight motor transmissions use nylon gears which fail over time.
The dashboard is known to short-circuit, resulting in intermittent operation of the dashboard. The result is a flashing dashboard – or – a dimly lit or a completely blacked out dashboard. The main reasons for this issue are: poor electrical grounds, corrosion on the terminals, or burnt out lightbulbs. To resolve this issue, one of three possible solutions exist. These are:
One or, or as many as all four halogen 882 light bulbs may need to be replaced.
Clean the 882 light bulb sockets.
Check ground connections for dashboard to ensure proper grounding.
Driver & Passenger Seats
Because of the high side rails on the lower edge of the driver and passenger doors, getting out of the Corvette can be difficult. As a result, the outside seat bolsters tend to fatigue, causing a number of issues – leather deterioration, tearing, structural fatigue of the bolster sub-assembly (padding).
1984 Corvette Maintenance Schedule
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.
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.
1984 Corvette DIY Service Guide
Battery & Charging
Inspection & Replacement of Battery, Factory Battery Specifications, Replacement of Alternator/Generator. Click here to learn more.
Belts & Hoses
How to Replace Drive Belt(s), Inspection & Replacement of Upper/Lower Radiator Hoses
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. Click here to learn more.
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. Click here to learn more.
Location of, Inspection & Replacement of Oxygen Sensors (Upstream/Downstream), How to Replace the EGR Valve, How to Replace the Smog Pump
Location & Replacement of the Following Filters: Oil Filter, Fuel Filter, Transmission Filter, PCV Valve
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
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)
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
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
Transmission & Clutches
How to Change the Transmission Filter (Automatic Transmission), How to Replace a Clutch (Manual Transmission)
1984 Corvette Dealers Sales Brochure
Download this 1984 Corvette Dealers Sales Brochure for a quick look at the features of the car.