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Corvette 427, Z06 owners sue GM over engine problemsby Justin King
The plaintiffs claim GM is aware of numerous engine failures, but has not yet resolved the underlying issue.
General Motors has been hit with a lawsuit from disgruntled Corvette owners who have dealt with engine failures.
The group is focused on the 7.0-liter LS7 V8 engine, which powered the sixth-generation Corvette Z06 coupe and 427 Convertible from the 2006-2014 model years. The engines are said to be prone to valve-guide degradation that eventually destroys the engine.
Attorneys have outlined dozens of claims, ranging from RICO Act violations to negligence and fraud, according to a report spotted by .
The 19 owners accuse GM of initially investigating the reports, measuring wear via the 'wiggle' test, however the company has allegedly not yet resolved the underlying issue or promised a fix.
Attempting to quell hysteria over the problems, a Chevy customer service representative in 2012 told members that it only affects a "small number" of Z06s from the 2008-2011 model years.
"Through inspection of returned heads, it was determined that a machining error in the valve guide had occurred at our head supplier," the rep wrote. "The quality issue has been contained as of Feb 2011 with 100% inspection of all heads."
The post acknowledged engine failure as an eventual possibility if the issue is not addressed, however he claimed that drivers should hear unusual valvetrain noise before more serious problems occur.
The comments were published when the oldest affected vehicles were still covered under GM's five-year warranty. It is unclear if the company has launched an extended warranty program to fix vehicles that are now more than five years old or have surpassed 100,000 miles.