While an engine compression tester may not be the most common tool in a mechanic's garage, they can be very useful, especially for older cars.

Compression test kits do just what they say: measure the ability of each cylinder of your engine to combust the fuel/air mixture without losing any of the resulting energy.

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

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

We walk you through a compression test, a great way to determine the condition of your valves and piston rings.