Name:Cylinder Leak Tester Group
Main Material: Metal，plastic
Measuring range: 0-100psi
Fixed short connector : M12
Fixed long connector :M14

Instructions

1. Remove the spark plugs of the engine, use the hand crank to rotate the crankshaft, make the piston at the top dead center, hang the direct gear, and tighten the parking brake to prevent the compressed air from pushing the piston during the test.

2. Screw the air supply connector on the first cylinder at the compression top dead center, and connect the air exchange tube with the quick-change connector end to the output of the measuring instrument. At the same time, connect the air compressor to the input end of the test instrument. Turn off the instrument regulator valve (pulse the regulator knob when in use).

3. Start the air compressor to inflate, close when it is charged to 0.8MPa, prepare the chronograph stopwatch, quickly open the pressure regulating valve, press the stopwatch at the same time, record the dwell time, observe the change of the measured pressure gauge, when the gauge pressure drops At 0.4MPa, according to the stopwatch, the time taken to reduce the gauge pressure from 0.8 MPa to 0.4MPa is recorded. Using the length of this time to compare the similar machines, the degree of damage to the cylinder leakage can be diagnosed, and the longer the maintenance time is, The better the cylinder seal is; if the pressure is short, usually less than 10 seconds, the cylinder leaks seriously and must be repaired. In order to facilitate the test, the test sequence of each cylinder is carried out according to the firing order of the cylinders. One revolution of the crankshaft (180°) is used to test one cylinder.

Judging the leaking part

Start the air compressor and supply air to the cylinder at top dead center.
Control the pressure to 0.6 MPa using a pressure regulating valve. Listen carefully to the air leakage to determine the air leakage of the cylinder.

If you hear a leaking sound at the throttle, it means that the intake valve is not sealed.

If you hear air leakage from the muffler port of the exhaust pipe, it means that the exhaust valve is not sealed.

If you listen to it at the refueling port, there is usually a sound of air leakage. It is normal to have a slight sound. The sound is loud, and it feels like there is air flow. It is a serious air leakage, indicating that the cylinder piston joint is not sealed.

If there is air coming out of the water where the radiator is watered, it means that the cylinder head gasket is burned out, causing the cylinder to collide with the waterway. If a blow-by sound is heard at the spark plug of the adjacent cylinder of the cylinder, it indicates that the cylinder head gasket between the two cylinders is burned and the cylinder is flushed.

Package Includes

1 x Dual gauged Leak Detection Unit(Suitable for use on any petrol engine with 12mm or 14mm spark plugs)
1x Flexi Hose
1x Fixed short connector
1x Fixed long connector
1x Case