Wobba
22-06-2012, 01:14
HI! As some of you know, I have hit a weird issue. I am getting quite good with these kind of things, but this is the first time with this engine. It is a forged engine with high compression parts.
When doing a compression test I suspected the compression figures would be lower from cold than a standard engine due to the clearances between the piston and bores with these engine types when cold. I had results from 85 to 100 PSI on all 4...very low in normal circumstances.
When I did a wet test on each one it was back up to 180-225 with variability for how much oil i dropped into the bores etc...its not an exact science.
Is this normal? Please only reply if you have a clue about forged engines and high comp stuff. My guess is they are crap with holding compression at low temps, so low compression results are not that unusual? Would make sense.
When doing a compression test I suspected the compression figures would be lower from cold than a standard engine due to the clearances between the piston and bores with these engine types when cold. I had results from 85 to 100 PSI on all 4...very low in normal circumstances.
When I did a wet test on each one it was back up to 180-225 with variability for how much oil i dropped into the bores etc...its not an exact science.
Is this normal? Please only reply if you have a clue about forged engines and high comp stuff. My guess is they are crap with holding compression at low temps, so low compression results are not that unusual? Would make sense.