Recently, there was a brake sensor issue, but now there’s an engine issue. Apparently, if you’re 2020 Corvette was built between June 1 to September 15, you’re included in a bad batch of valve springs. These springs were used across GM’s lineup in everything from the Camaro to the Chevy Express Van. General Motors issued a service bulletin TSB PIP5752A as a result.
the V8 engines impacted by this bad batch of valve springs include the L87, LT1, LT2, LT4, L82, L84, and L8T. Owners may experience a check engine light and the vehicle may misfire and make other noises, according to GM Authority.
The technical service bulletin advises technicians to replace the faulty valve springs and perform a cylinder leakage test on the affected cylinder. The bulletin adds: “if no cylinder leakage is observed it will be necessary to replace all valve springs on both banks if the vehicle is built between June 1, 2020, to September 15, 2020.”
Below is a reprint of the bulletin’s info:
#PIP5752A: Service Engine Light misfire engine noise With DTC P0300 P0106 P0506 – (Sep 22, 2020)
Service Engine Light misfire engine noise With DTC P0300 P0106 P0506
Involved Region or Country:
A Vehicle may have a concern of service engine light, misfire and engine noise with possible of DTC P0300 P0106 P0506.
Possible broken valve spring
During inspection if you determine that the engine has a broken valve spring it will be necessary to perform a cylinder leakage test on the affected cylinder.
If no cylinder leakage is observed it will be necessary to replace all valve springs on both banks if the vehicle is built between June 1, 2020 to September 15, 2020. Note: This only applies to the 6.2L engines RPOs L87, LT1, LT4 and LT2. For all other engine RPOs L82, L84 and L8T just replace the affected valve spring.
If you determine that engine has cylinder leakage it will be necessary to inspect further to determine the extent of the engine damage to determine correct repair required.
All valve springs will be requested back for further analysis and inspection.