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Compression Test

All engines

Compression check allows you to make a conclusion about the state of the engine. Namely, when the verification can determine whether the order of valves and pistons (piston ring), or they are worn. In addition, the test results indicate that the engine requires repair. To verify the required compressometer that gasoline engines can be purchased inexpensively in the company network.

The difference in pressure between the individual cylinders can be a maximum of 2.0 bar. If one or more cylinders pressure differs by more than 2.0 bar, it is a sign of faulty valves, worn piston rings or cylinder mirror. If you wear limit is reached, the motor must be repaired or replaced.

PERFORMANCE ORDER

To test the compression engine temperature must be at least +30 ?� C. Then the temperature of the oil filter has hands. Engine temperature should not be too large, otherwise the unscrewing spark plug can be damaged thread in the cylinder head. Switch off the ignition. Petrol engine: Disconnect the plug from the plug 15 at the ignition distributor. Diesel engine: Turn off the valve plug from the fuel cut. If you do not disable the plug when turning the crankshaft is leaking fuel. Gasoline Engine: Disable All tips of spark plugs. For this there are special tongs, for example, HAZET 1849. Blow out the candles in the niches of the cylinder head with compressed air and unscrew the spark plug spark plug wrench. The diesel engine: Remove the nozzle and cut off the fuel return line to the fuel pump (high pressure fuel pump). See Chapter diesel engine. Several times Crank starter to remove any residual soot. Place the gearbox in neutral, apply the parking brake. Paste or screw compression gauge into the hole candles according to the instructions. Ask the assistant to squeeze the gas pedal completely and hold for the entire test. Post a crankshaft 8 turns on the crank until the instrument ceases to show an increase in pressure. Check all cylinders, and compared with the desired value. Gasoline Engine: Screw the spark plug and connect the cables, see. Chapter Introduction. Diesel engine: Set the nozzle, see. Chapter diesel engine. Gasoline Engine: Connect the plug to the terminal 15. Diesel: Connect the connector to the valve stopping delivery of fuel.