Al,
Wet test. Take out the spark plug and squirt oil into the cylinder. Do the
compression test. If the results change then the rings are contributing to
the compression readings. If there is no change then the issue may be with
valves. Understand, of course, that it may be both to some degree.
Leak down test. Introduce compressed air into the cylinder and put an ear
to 1. carbs; intake valve leak 2. exhaust; exhaust valve leak 3. sump;
piston rings.
My guess is that you have excess positive crankcase pressure because of the
oil leak at the sump gasket that doesn't stop. IMHO
David Lylis
69 TR6 CC26160L
60 TR3A TS74461LO
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