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Old 08-02-2013, 07:33 PM   #92
Bhobbs


 
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Drives: 2015 SS 1LE Red Hot, 1970 Chevelle
Join Date: Apr 2012
Location: Chino, CA
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Quote:
Originally Posted by Retro69 View Post
What's failing to cause this?

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GM said it was a machining flaw. If it isn't fixed by now, it's a design flaw. It has to do with valve guides not being the correct size and the valves rock.
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