Thread: Need Help Solving this engine puzzel

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Originally Posted by DennyW

I re read your first few posts, and now that you checked with a feeler gauge all the way around the piston, and the ring is against the cylinder wall, I now think back to the valves, cam lobe, or similer. You said it may have changed from 30, to 32. Squirting oil in the cylinder should have brought it up more than that if it was a ring problem. Maybe you should double check your valves for sealing, and make sure the cam lobes are ok. Is there something holding a valve slightly open, and they look ok from a standard look ? Flip the head, and pour some fluid in there and see if it leaks by the valves.

I did check the valves by pouring tranny fluid and left the fluid in there for at least 8 hours and no fluid leaked out and I did tested the entire head.

The valves also move normally "non sticking" no cracks as a matter of fact the exhaust valve in the sick piston was a bright white and the a-joining exhaust valve was a light brown and the next exhaust valve was a dark black

Also please note that I did pour tranny fluid in the sick cylinder and the fluid did leak out over an 8 hour period and also note that the other good cylinder did hold all of the fluid in the same test period. Now the 2nd test I did pour paint thinner in the sick cylinder and in the good cylinder the fluid ran out of the sick cylinder in an hour or so and the good cylinder kept it the thinner for at least 6 hours

All of my fluid tests always point to bad or broken rings The other puzzling thing is that the cylinder walls look perfect on all 3 cylinders

The cam Lobes look perfect