This manual provides step-by-step instructions for performing a compression test on an internal combustion engine. It details the procedure for removing spark plugs, connecting the gauge adapter, cranking the engine, recording pressure readings, and interpreting results to identify issues such as sticking valves or worn piston rings.
The document also includes a repair parts list with part numbers and descriptions for components included in the kit, such as compression gauges, hoses, adapters, and carry cases.
The reading should not vary more than 10% from cylinder to cylinder.
The engine must be cranked for at least five compression strokes or until the pressure stops rising.
A difference of 20 psi between adjacent cylinders may indicate a defective head gasket.