Quote:
Originally Posted by njsteve
First thing we did was a compression test on the engine. Here's the results:
cyl 1: 125 psi
cyl 2: 120 psi
cyl 3: 125 psi
cyl 4: 115 psi
cyl 5: 115 psi
cyl 6: 120 psi
cyl 7: 115 psi
cyl 8: 125 psi
I then sprayed some oil in the low psi cylinders and retested with negligible improvement. (So that means it's the rings, not the valves - more on this later).
Since there was more than 10% variation between the highest and lowest pressures, it was time for a freshening.
I unplugged everything rather uneventfully in a day and got it out of the engine bay with the help of the wife and the kids.
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Maybe I'm missing something, but that's 8% difference. If it wasn't using oil, I wouldn't have rebuilt as it's only virgin once. Bore and bearings would seem to indicate that there were no issues.
As to why it was gutless, the tiny cam they put in those from the factory is the culprit I'm sure. I hope you're planning at least a mild upgrade in that area. Very cool car.