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The valves were inspected, no excess wear on valves, seats or guides. Exhaust valve had slight carbon so I lapped it in to clean it. Customer will have leak down test done, I don't have the tools to do it. Suspect it is the rings. Too old and costly to rebuild, he will probably run it until it...

I have 65# on the right and 130# on the left. Replaced head gasket, valve are good, still 65#. I hear a difference when cranking with each side plugged, separately. The bad side sounds like a leakage, but not sure where. Can a cracked ring lose that much? Also, pushing oil out somewhere, that...