Quote: what are you seeing that tells you ring seal is an issue? last time I did a leak down it showed 5%. the chambers are black because it idle with a very fat carb before it threw a pushrod.
It's not the black it's oil in chambers,exhaust ports and intake ports.
Side note leak down will not tell you what ring seal is like in running engine.
But again this is not the major problem my bet is on cam/springs.
