Quote:
Originally Posted by BMRLVR
The deposits appear wet to me which would make them hard to read and would make their appearance look different to the camera! The way to read a piston or plug and get a correct reading is to run the engine hard after it is at operating temperature and then shut it down with no idle time whatsoever!
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Some of the piston crowns do indeed show some trace of oil no doubt picked up during the disassemble but others are dry. This was a car driven to an engine shop for an engine rebuild, no reason to suspect that it wasn't just switched off when it arrived.
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.