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Corvette
C7 Forum
General Motors V8 Engine Valve Lifter Lawsuit Claims Recall Is Needed
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<blockquote data-quote="cdnrx1" data-source="post: 265914" data-attributes="member: 2880"><p>The simple answer is - yes. It's a relatively well known failure that has plagued the C7, and numerous other GM vehicles using the L83, L86, LT1, and LT4 engines, since it's inception. For those lucky enough to have a C7 ZR1 (LT5), they are not at risk for AFM related failures as that engine doesn't use it. The problem has been well documented on most US forums and one case, that I know of, here on the CCF. <a href="https://canadiancorvetteforums.com/threads/who-wants-to-puke-random-lifter-failure.50310/#post-254147" target="_blank">Who wants to puke?? ( random lifter failure)</a>. The good news is that the failure rate is not overly extensive (no comfort to those that have experienced it) and, if it's within the Powertrain Warranty period, GM will usually cover the cost of engine replacement or repair. Unfortunately, there are owners who's vehicles were outside of the warranty period, or were denied for other reasons, and had to pay for the repairs. Hence the lawsuit.</p><p></p><p>As to whether or not the issue has been confirmed by GM engineers I would again say - yes, as the attached TSB would indicate. There are many articles, GM Techlink documents and warranty related stories that can be turned up by searching "C7 Corvette AFM lifter failure". It's a real problem that, so far, doesn't have a satisfactory answer. Although there are a number of methods and devices available that will circumvent or deactivate AFM, ie: don't drive in Eco (M7 only), drive in manual mode only (A8), use an AFM disabler (Range device) or apply a custom "tune", none of them guarantee that the vehicle will not experience some form of AFM related failure. It truly is a crap shoot.</p><p></p><p>Hope this helps.</p><p></p><p>Best regards</p><p>Ross</p></blockquote><p></p>
[QUOTE="cdnrx1, post: 265914, member: 2880"] The simple answer is - yes. It's a relatively well known failure that has plagued the C7, and numerous other GM vehicles using the L83, L86, LT1, and LT4 engines, since it's inception. For those lucky enough to have a C7 ZR1 (LT5), they are not at risk for AFM related failures as that engine doesn't use it. The problem has been well documented on most US forums and one case, that I know of, here on the CCF. [URL="https://canadiancorvetteforums.com/threads/who-wants-to-puke-random-lifter-failure.50310/#post-254147"]Who wants to puke?? ( random lifter failure)[/URL]. The good news is that the failure rate is not overly extensive (no comfort to those that have experienced it) and, if it's within the Powertrain Warranty period, GM will usually cover the cost of engine replacement or repair. Unfortunately, there are owners who's vehicles were outside of the warranty period, or were denied for other reasons, and had to pay for the repairs. Hence the lawsuit. As to whether or not the issue has been confirmed by GM engineers I would again say - yes, as the attached TSB would indicate. There are many articles, GM Techlink documents and warranty related stories that can be turned up by searching "C7 Corvette AFM lifter failure". It's a real problem that, so far, doesn't have a satisfactory answer. Although there are a number of methods and devices available that will circumvent or deactivate AFM, ie: don't drive in Eco (M7 only), drive in manual mode only (A8), use an AFM disabler (Range device) or apply a custom "tune", none of them guarantee that the vehicle will not experience some form of AFM related failure. It truly is a crap shoot. Hope this helps. Best regards Ross [/QUOTE]
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Corvette
C7 Forum
General Motors V8 Engine Valve Lifter Lawsuit Claims Recall Is Needed
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