The degree of wear of the parts of the crank and gas distribution mechanisms of an internal combustion engine is determined by the degree of compression of the working cylinder. By measuring the compression, a complete picture of the technical condition of both the motor as a whole and its individual most important components is created.
Necessary
compressometer
Instructions
Step 1
It is advisable to measure compression after driving a car, when the engine is warm enough. To measure these parameters, you cannot do without an assistant, due to the fact that during the measurements the crankshaft is turned by the starter, and the throttle valve must be fully open.
Step 2
Unscrew all spark plugs from the cylinder head.
Step 3
The tip of the compressor with a rubber stopper at the end is inserted tightly into the threaded hole of the removed plug.
Step 4
The assistant is given a command and he, by pressing the accelerator pedal, rotates the crankshaft with the starter for 3-4 seconds. It must be borne in mind that the rotational speed must be at least 100 rpm. Otherwise, the battery is recharged or replaced.
Step 5
After measuring the compression in all cylinders of the engine, an idea is created about the degree of wear of the compression rings and the tightness of the timing valves.
