Compression tests are done hot, that is with about 10 minutes run time on engine. I just completed tests on my 235. The rubber gasket did not have any problems. Remove all spark plugs, open carberator choke and trottle valves and be sure to turn the engine four revolutions. The fourth will build to give you the maximum compression.


1954 Chevy 3100 Deluxe Five Window

"It is not a mistake unless it cannot be fixed."