100psi on 3clyinders
02-18-2009, 08:36 PM
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100psi on 3clyinders i did a compression test on 3cylinders and it was 100psi is that a sign of bent valves because i know its not good someone help me?
02-19-2009, 09:18 AM
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Right on. He needs to run a leak down to really find where the problem is at. It could be bent valves, ring issues, or even a head gasket problem. A CT will only tell you which holes have the problem. Additional I would wonder which 3 cylinders are at 100 psi, and also what do the others read?
02-21-2009, 12:37 AM
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I'm in the exact same boat- compression test on LS1 today showed 3 cylinders with 100 psi (Nos 2, 3, and 5). Others were 150-175 psi.
I suppose this is a stupid question, but how do I do a leakdown test? What am I looking for??
I was just assuming rings and decided that I needed a total rebuild or a new motor...any ideas or help much appreciated. Is it likely this is something other than rings?? Thanks.
I suppose this is a stupid question, but how do I do a leakdown test? What am I looking for??
I was just assuming rings and decided that I needed a total rebuild or a new motor...any ideas or help much appreciated. Is it likely this is something other than rings?? Thanks.
02-21-2009, 08:43 AM
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SSCamaro4- not meaning to hijack your thread, I figure the response to my question also helps you.
I asked a friend to give the car a once over in his shop. He told me they ran a compression check on each cylinder and I posted the results. The car runs, drives, and feels very strong. I was surprised by the results of the test, but it enough to make me put the brakes on my cam and header install...want to figure out if I have bigger problems first. Thanks.
I asked a friend to give the car a once over in his shop. He told me they ran a compression check on each cylinder and I posted the results. The car runs, drives, and feels very strong. I was surprised by the results of the test, but it enough to make me put the brakes on my cam and header install...want to figure out if I have bigger problems first. Thanks.
