937carrera wrote:OK, with the concerns you expressed about compression I thought you were looking to replace pistons or barrels and the measurements were going to help you decide how far to go. I didn't want you to junk perfectly functional components.
Have you decided where the oil was coming from yet ?
measurements are
No1 93.95/94.06 =0.11
No2 93.93/94.05 = 0.12
No3 93.88/94.07 = 0.19 ( broken ring)
No4 93.97/94.06 = 0.09
I think 3 of the four are OK with new rings but the one that had broken rings needs a replacement barrel and possibly a piston, need to inspect it further.
Verdict is out with the oil on back on valves, I just don't know if oil coming past rings would collect on valves?
What I do know is what2do over filled the oil once and so some of that build up could be from that one off event.
The rings are clearly worn past their spec so probably explains low compression
it possibly dripped more oil than it burnt, it was reported as only burning on the overrun but that could all have come from the cylinder with broken rings.