cbolt Posted November 3, 2010 Share Posted November 3, 2010 You can do the same test with a compression gauge and some motor oil. Run the cylinders, record the readings. Then pour a tablespoon of oil in the spark plug hole and look for a higher reading. Higher readings would indicate ring wear, no change indicates valve seats/seals. Quote Link to comment Share on other sites More sharing options...
kc8oye Posted November 3, 2010 Share Posted November 3, 2010 You can do the same test with a compression gauge and some motor oil. Run the cylinders, record the readings. Then pour a tablespoon of oil in the spark plug hole and look for a higher reading. Higher readings would indicate ring wear, no change indicates valve seats/seals. Man.. there's a heck of an echo in here Quote Link to comment Share on other sites More sharing options...
cbolt Posted November 3, 2010 Share Posted November 3, 2010 Man.. there's a heck of an echo in here The difference is no compressed air source requirement for the wet and dry compression test so I can run it on his car down in Old Town during the show if he is willing to remove the plugs. Quote Link to comment Share on other sites More sharing options...
kc8oye Posted November 4, 2010 Share Posted November 4, 2010 the problem is you can't compare leakdown rates with a compression gauge unless you are lucky enough to have one that doesn't 'hold' the peak reading. Quote Link to comment Share on other sites More sharing options...
Mike 57 Posted November 4, 2010 Share Posted November 4, 2010 I agree with Sam and Bill Quote Link to comment Share on other sites More sharing options...
Chevyss Posted November 4, 2010 Share Posted November 4, 2010 I was always told that if you do a valve job and do nothing to the block that the engine will use oil. I sure don't think that 1 1/2 qts in 1200 would be anything to worry about. JMO Quote Link to comment Share on other sites More sharing options...
cbolt Posted November 4, 2010 Share Posted November 4, 2010 the problem is you can't compare leakdown rates with a compression gauge unless you are lucky enough to have one that doesn't 'hold' the peak reading. Same results but I can do it on the road without a compressed air source. I have used a compression gauge this way several times in the past with 100% accuracy. Not to say that a leak down tester doesn't have it's uses but for kenny's problem I should be able to diagnose it quickly at the car show with minimal effort. Quote Link to comment Share on other sites More sharing options...
kc8oye Posted November 4, 2010 Share Posted November 4, 2010 chevySS: it's not.. even GM says anything over 500 miles/qt is fine. Quote Link to comment Share on other sites More sharing options...
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