Cylinder compression testing

Cylinder compression testing

A compression test is one of those things that is mentioned a lot in the forums, but rarely ever explained. It’s a basic diagnostic tool that every mechanic should be familiar with and is one of the go-to tests for a myriad of automotive problems.

Doing a basic cylinder compression test is a simple, straight-forward procedure. You can do it in four steps with only basic hand tools and a compression gauge like the one shown here.

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