You got this one backwards. If you have low compressions and want to
determine if it is valves or rings yes you will need to do a wet test.
But the compressions will jump dramaticly if the rings are good. If
there is little change in the compression then you will have ring
problems.
For example if you have compression of 100 on 3 cylinders and 150 on
the other 3 cylinders. After squirting in the oil the compressions will
jump to well over 200++ on the cylinders that have good rings. Those
cylinders that have the low compressions and only jump up to mabey 125
to 150 will have bad rings. If you here a popping noise in the exhaust
when taking a compression test you will have a burnt valve.
David Nock
British Car Specialists
Stockton Ca 95205
209-948-8767
www.britishcarspecialists.com
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On Mar 20, 2006, at 3:50 PM, BEAU2EVE@aol.com wrote:
> When you are doing a compression test and you question your results,
> do a
> wet test also. To do this just squirt 4to6 shot of engine oil into the
> cly and
> retake that compression test. If the compression has increased
> dramatically you
> have ring problems, sorry. Valves will not seal with oil, but rings
> will.
>
> Beau
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