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I did a compression test on a car I bought awhile ago, previous owner ran nitrous. Engine started to smoke, shop told them that #7 cylinder sleeve was cracked. This is my first time doing this test and these are the numbers I got, I believe my problem is on the other side. #6 gave me nothing, it made noise like it was the starter, but didn't give me the sound of the motor turning over like the others. I took a pic of the spark plugs. I believe my firing is correct.
first pic bottom plug is #1 then 3,5,7, second pic left is #2 then 4,6,8
ok is that what is causing 2 and 4 to have a lower number? Also everything else looks good? They where told #7 had a cracked cylinder sleeve, that's incorrect right? based off the numbers? First time messing with an engine. Thanks for the tips
ok is that what is causing 2 and 4 to have a lower number? Also everything else looks good? They where told #7 had a cracked cylinder sleeve, that's incorrect right? based off the numbers? First time messing with an engine. Thanks for the tips
Can't tell for sure but the motor clearly needs to be torn down anyway so I'm sure you'll figure it out during.
Ok so in 2 and 4, shoot a squirt of motor oil in the soarkplug hole and retest. If it comes up, its rings. If not, it's one of the valves in 2 and 4 also
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compression test results, need advise 
