Earlier this year, Car and Driver experienced engine failure on their long-term C7 Corvette Stingray, caused by metal shavings breaking loose in the oil filter. Then, not long after, the C7 Corvette Chevrolet had given them for their Lightning Lap test also broke down due to “contaminated oil” in the engine.
Now, the first 2015 Corvette Z06 has decided to lunch itself with only 891 miles on the odometer. Corvette Forum member Lawdogg said he was accelerating from 35 mph and shifted below redline when he heard a loud noise. The car began knocking, so he pulled over and popped the hood. He discovered a knock coming from the no. 6 cylinder, and another “serious, grinding, metal-on-metal sound coming from the supercharger area.”
When the dealer had a chance to inspect the car, they found a failure in the No. 6 cylinder’s valvetrain. GM gave him the option of fixing the engine itself in order to retain a numbers matching Z06, or replacing the engine altogether. He took the smarter option of those two and had the entire engine replaced, which means he’ll be without a Z06 for quite some time.
It’s not entirely clear what caused the engine failure, however GM instructed him not to start disassembling the engine as they’d like to evaluate it themselves. Lawdogg, somewhat worryingly, said GM seemed hardly surprised by the fact his Z06 engine had blown up and said it “seems this has happened with test fleet vehicles.”
It’s much too early to speculate over whether this is a manufacturing flaw with this single car or if it is only the first of many Z06 engine failures. GM should give Lawdogg an answer soon enough, which he’ll hopefully share online. For now, you can stay up to date with the discussion on Corvette Forums.