A compression test is to determine how much pressure the engine makes, and a leakdown test measures its ability to hold pressure.

Healthy engines should have compression over 100 psi per cylinder, with no more than 10 percent variation between the highest and lowest readings.

If the compression is down, like what Davin experiences on cylinder number three, a small amount of oil can be added to the cylinder before completing the compression check again. This oil in the ...

The guys at Muscle Car Review show you how to check engine compression with the latest tools. Check it out only at hotrod.com or the October 2011 issue of Muscle Car Review Magazine.

A crank compression test can tell you a lot about an engine and we will be going over the numbers. - Super Chevy Magazine ...