Oh, the car was a thrill. With 650 horsepower worth of stomach-churning acceleration, a top speed of over 200 mph and more lateral grip than a wall could provide, it was world class in all respects. Unfortunately, its monstrous, supercharged 6.2-liter V8 performed a dramatic act of self-immolation during some spirited laps at the racetrack.
And now we know why.
After bringing it back to Chevrolet HQ for inspection, the engineers determined that the likely cause was a piston connecting rod bearing that was damaged by debris in the oil that was left behind after tapping the threads for the oil filter. Once a piece gets jammed in there, it starts creating more debris, which keeps making things worse until finally … kablooey. In this case, it took out a few more pistons with it.
Several other engines built early in the production run exhibited similar problems, but Chevy is confident that it has solved the root issue. Nevertheless, it is now recommending that all Z06 owners change their oil after the 500-mile break-in period to make sure that it’s clear of any debris before any of it gets stirred up into the important parts during high-performance driving.
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