Quote:
Originally Posted by nmuir
Got the oil samples back (faster than expected which is nice!)
I attach the port engine sample. The metals seem ok. If there was piston slap I might expect more aluminum, but bow to those with more knowledge than me!
Does the sample prompt any comments?
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I can offer you the sample readings for my port Lehman 120 a mere four operating hours before the engine made so much slapping noise that I had it rebored and all new pistons and bearings put in. AND I can offer the oil analysis data for 103 operating hours after the overhaul.
Iron before/after 7/30 and remained in this 30 +/- regime for the next 28 years
Copper before/after 1/10 and remained consistent with post overhaul number for next 28 years
Al before/after 2/11 and remained consistent with "after" reading thereafter
Lead before/after 2/3 and ditto.
So to me looking at this data tells me nothing about impending doom.