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 ...

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 ...

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 ...

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 ...

With a simple diesel engine compression test, it is possible to spot compression problems before they get worse. Here’s information on these tests and how to decide if it is time to perform one.

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. While they're not as ...

Increasing an engine’s compression ratio is a proven way of ... but the engine self-destructs during an acceleration test, which admittedly didn’t require a crystal ball to predict.

Part 2 brought a set of CNC-ported PI heads from Total Engine ... compression to work with its supercharger kits, we contacted Sean Hyland Motorsport about a suitable low-compression test mule.