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Z06 Vette LS7 piston failure

   
Old Jan 28, 2008 | 08:46 PM
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Default Z06 Vette LS7 piston failure
Z06 piston failure on #6 with a supercharger. Piston coming apart and scoring cylinder walls badly.
Attached Thumbnails Z06 Vette LS7 piston failure-2007-zo6-corvette-061.jpg   Z06 Vette LS7 piston failure-2007-zo6-corvette-062.jpg   Z06 Vette LS7 piston failure-2007-zo6-corvette-063.jpg  
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Old Jan 28, 2008 | 08:58 PM
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time to forge it! can the block be cleaned up with a bore/hone, or is it too deep?
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Old Jan 28, 2008 | 09:04 PM
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Originally Posted by Greg Fell
time to forge it! can the block be cleaned up with a bore/hone, or is it too deep?
I will measure tomorrow, just tore down tonite. It will easily catch a finger nail on both scars. Compression was 85psi and will not pass a leak down test.
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Old Jan 28, 2008 | 10:49 PM
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pm sent
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Old Jan 29, 2008 | 12:29 AM
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Take a good look at that cylinder wall when you remove the piston. It may be cracked. I can resleeve the block if it is cracked or won't clean up. Don't junk it.

Steve



Originally Posted by fossil
I will measure tomorrow, just tore down tonite. It will easily catch a finger nail on both scars. Compression was 85psi and will not pass a leak down test.
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Old Jan 29, 2008 | 07:47 AM
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What was the cause of failure?
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Old Jan 29, 2008 | 08:22 AM
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Too much boost? Ran lean?
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Old Jan 29, 2008 | 08:32 AM
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Originally Posted by Jon5212
Too much boost? Ran lean?
Ran lean.....
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Old Jan 29, 2008 | 08:36 AM
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good luck with it hope for the best
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Old Jan 29, 2008 | 09:16 AM
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Originally Posted by fossil
Ran lean.....
Oops ... well you can't blame the motor for that!
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Old Jan 29, 2008 | 09:58 AM
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The only positive is that this is a customers engine and not mine.
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Old Jan 29, 2008 | 12:54 PM
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That's the spirit.

D.J.
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Old Jan 30, 2008 | 09:03 PM
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Sure looks lean on one cylinder. Injector problem?? Intake leaking? Would suck to fix the motor and have it do it again...
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