How to Perfom a Cylinder Compression Test

In this video, I show you how to use a Compression Tester. I go through the procedure of using it on my Mini Cooper to see how well the engine can make compression in each of its cylinders.

A compression test reveals the condition of your engine's valves, its valve seats, and piston rings and whether these parts are wearing evenly. Healthy engines should have compression over 100 psi per cylinder, with no more than 10 percent variation between the highest and lowest readings. With the use of a few hand tools, a compression tester, and about 20-30 minutes, you can perform the test at your very own home.

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