Compression test results help!
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Compression test results help!
ok ive rented the oem brand compression tester from vatozone yesterday and conducted a compression test on my 00 gsr motor.
I removed all spark plugs, disabled fuel injectors, held the throttle wide open, and cranked until the needle stopped climbing. all cylinder were tested 2 times before i recorded the final number of psi. i put a cap full of oil into cylinder # 3 and the psi jumped up to 300 (that's the max my gauge will let it go). Also this was done on a cold engine. here are the results
cylinder 1. 221 psi
cylinder 2. 243 psi
cylinder 3. 215 psi
cylinder 4. 243 psi
what does this mean for cylinder #3? my rings are bad? my valves or valve seals, or ???
I removed all spark plugs, disabled fuel injectors, held the throttle wide open, and cranked until the needle stopped climbing. all cylinder were tested 2 times before i recorded the final number of psi. i put a cap full of oil into cylinder # 3 and the psi jumped up to 300 (that's the max my gauge will let it go). Also this was done on a cold engine. here are the results
cylinder 1. 221 psi
cylinder 2. 243 psi
cylinder 3. 215 psi
cylinder 4. 243 psi
what does this mean for cylinder #3? my rings are bad? my valves or valve seals, or ???
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Re: Compression test results help!
i searched up that if psi jumps by adding oil to a cylinder it means the cylinder rings are at fault. True?
#4
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Re: Compression test results help!
Yes that is true...
But thats a "probably"...i would go for definate. You can add oil to the other cylinders and cause the psi to jump up as well.
When you initially removed the plug from cylinder 3, did it looked fouled at all? Was there oil on it?
But thats a "probably"...i would go for definate. You can add oil to the other cylinders and cause the psi to jump up as well.
When you initially removed the plug from cylinder 3, did it looked fouled at all? Was there oil on it?
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Re: Compression test results help!
1, 2 and 3 had oil on the plugs. 3 having the most on it. did not look foul as i just changed all plugs a month ago without putting a single mile on it.
i will look into buying a leak down test kit soon. thanks
i will look into buying a leak down test kit soon. thanks
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Re: Compression test results help!
well just bought a leak down test kit from summitracing for $80. ill give updates once i get it in the mail.
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Re: Compression test results help!
well guys i got my leak test kit but still havent tried used it since. i should be able to do it this weekend though.
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