What Does It Mean to Crank Cylinder Pressure?


Quick Answer

The term "to crank cylinder pressure" refers to conducting an engine cranking pressure test, which helps to determine any inconsistencies between cylinders. The test takes several things into account including compression ratio, rod length, cam duration, altitude and temperature.

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Full Answer

The engine cranking pressure is the compression that builds in the cylinders when the valves are closed and the piston shifts upwards to compress the mixture. It is measured in pounds per square inch. The test involves removing all the spark plugs and installing a pressure tester. The technician then disconnects the coil, opens the throttle and cranks the engine several times using the starter. The results of the test appear on the tester's gauge.

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