If the cause of poor engine performance could not be found, perform a compression test. Regularly carrying out this check will also allow you to prevent the occurrence of malfunctions in advance.
Order of execution
1. Check engine oil level. Make sure the starter is working properly and the battery is fully charged.
2. Start the engine and warm it up to a temperature of 80–95°C.
3. Turn off the engine and remove the high voltage wires from the spark plugs.
4. Remove spark plugs.
5. Check the engine crankshaft.
6. Screw the tip of the compression gauge into the spark plug hole.
7. Fully open the throttle.
8. Turn the engine crankshaft about 4 turns with the starter and determine the compression on the instrument scale.
Compression: 1.47 MPa
Minimum allowable compression: 1.37 MPa
9. Repeat steps 6-8 for the rest of the cylinders.
10. If compression is low in all cylinders, pour a few drops of engine oil into the cylinders through the spark plug holes and repeat steps 6-8.
1) If adding oil raises compression, the piston rings may be worn.
2) If the compression remains at the same level, the valves may have burned out or the cylinder head gasket may have been damaged.
3) Screw in the spark plugs and connect the high voltage wires to them.
Tightening torque: 20–30 Nm