Quote:
Originally Posted by SenorFunkyPants
It is a bit rich that pictures of piston crowns posted to demonstrate that no detonation was occurring then require some contortions to try and explain the clear evidence of poor combustion and micro pitting.
Quote:
Originally Posted by regular guy
There is no pitting on the pistons whatsoever. Please circle and repost photos of the areas of the pistons to show where you think pitting occurred.
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Take piston #8
What indicators of some level of detonation are you looking for: Firstly the evidence of a clean burn in the area of the cooler intake valves combined with a build up of carbon in the area below the hotter exhaust valves due to poorly controlled and accelerated combustion. Secondly a fine grainy sand blasted appearance visible on the carbon deposits in the same area below the exhaust valves.
Oh and the shop started up and stopped the car every day for 2.5 months! really? If so, I hope the cats had been removed else they would be most likely shagged.