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

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.

If your car is getting older or you feel like you may be losing some engine power, a compression tester can help sort out the problem.

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

A compression test reveals the condition of your engine's valves, its valve seats, and piston rings and whether these parts are wearing evenly.