A compression test is to determine how much pressure the engine makes, and a leakdown test measures its ability to hold pressure. See All 14 Photos Engine CompressionAtmospheric pressure at sea ...

All you'll need to do to test it is remove all the spark plugs and install a compression tester. Then disconnect the coil, hold the throttle wide open, and crank the engine over several times with ...

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 ...

A four-stroke (or four-cycle) engine is so called because ... happens as it moves up on the compression stroke. Take a look at the Cylinder Pressure Decay chart and then let's go through the ...

You can find out quite a lot about an engine's internal condition through compression testing, but as long as proper procedures are followed. Many people mistakenly make this test with diluted ...