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the engine is already sold, I offered to test it for the seller and was just trying to make sense of my findings. Thanks for your help.

thanks for the analysis, it makes sense to me now, I did not find any thing about pre warming in the tm but it could have been in another section. The section I read was in the engine breakdown section 3-2 of the 289-34 manual. If it was in there then I missed it. I was not real clear about...

I retested today per the tm and with the engine cold, with temp gun the block was 60 degrees. It was cold last night, down to about 38F. I tested it mid afternoon when it was about 70F. All of the cylinders tested similar to each other the lowest reading i got was 420 psi and the highest was...

I am going to retest again tomorrow, yes tm says 380 to 400, will test with engine cold so that I see if there is a difference since i gather no one here knows if it should be different on a hot motor vs. cold motor, that was my question. I have read when researching turbo set up and other...

i read the tm and it did not say anything about engine temp for test. I removed air cleaner. My directions on the tester said to warm engine to opperating temp. So I did a combination of both directions. else where in the forum I found references to fresh motors having around 430psi...

I tested the compresion on an engine that I am selling. I have never tested a 6.2 before but have done gas motors. I have a brand new guage from Mac tools and propper tips. I first warmed up the motor to opperating temp (190 degrees with temp gun) and then began testing. The first cylinder I...