Hi,
I just want to chime in on this one... I think I would try "all the
above", but I would not discount blowby as a possible source of the oil
leak. In fact, on an older British car, I would more or less assume that
some bloyby exists, unless the person in question is running "total seal"
compression rings.
To wit - the original poster indicated "good compression", but did not
state as to wheter any cylinder leak down exists. Just a small amount of
crankcase positive pressure will make oil come out of the strangest
places.
The point is - in an effort to be thorough in your testing, you should not
eliminate _any_ possible source of the problem. 'till you find the
problem, of course.
If it was my motor, I'd try a leak-down test - it's simple, it's effective
and it eliminates a _lot_ of guesswork.
rml
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