I would think that the increase due to oil would point to rings rather than
valves. A leak down test should help pinpoint the cause of low compression. If
it is an intake valve you will hear a faint hissing sound when you listen into
a carburetor. If it is an exhaust valve you will hear it in the exhaust pipe.
Gary Hodson
In a message dated 12/12/2007 2:26:48 PM Central Standard Time,
Awgertoo@aol.com writes:
It seems that cylinder #3 is low by about 10-15% across the board. But
does the fact that the oil squirt raised all readings up proportionally
point
toward a bad exhaust valve? Would a leakdown test be any more significant?
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