[Healeys] Compression test

Warthodson at aol.com Warthodson at aol.com
Thu Dec 13 07:20:53 MST 2007

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 at 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 
toward a bad exhaust valve?  Would a leakdown test be  any more significant?

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