Cracked piston?
#1
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Cracked piston?
A friend took apart a motor that was smoking pretty severely tonight. The #2 piston (factory 99 piston) was cracked across the center of it inline with the wrist pin. The rings appear to be in great shape, no signs of detonation, rod bearings look good and even the cylinder walls are fine. This happened on decel while on an offramp while exiting the expressway. Any thoughts on what might have caused this?
#7
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I'll get some pictures some time this week when I make it over there. It was running forged rods with the stock pistons on the bottom end. This motor had been running fine under boost prior to this. Just a little weird that there's no other problems with it. I think we were hoping to see signs of detonation or at least something that would point to an exact reason for the failure.
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