[techguy]

Hey Guys,

Bought a nice compression tester last fall and with the weather warming up this weekend I figured I would try it out on the car. Obviously I am going to disable the fuel pump but have questions on the engine prep before the test.

My thoughts are to run the test with a cold motor and all plugs in. Is this correct? I figure with the plugs in the back pressure would be more like actual operating conditions?? I have also read that the plugs should be removed cold due to expansion and possible damage to threads on a warm engine???

What procedures are correct?