Possible causes | Remedy |
Temporary noise when starting from cold. |
| Normal | The noise disappears after warming up the engine oil and achieve a normal pressure |
Continuous noise after the engine does not start up within 48 hours. Continuous noise when starting the engine and replace the cylinder head Continuous noise after a long run the starter motor or towed Continuous noise after replacing the hydraulic jacks of backlashes of valves
|
- Oil leaked from the chambers of hydraulic jacks of backlashes of valves, and they hit the air
- Insufficient oil in the engine oil ducts
- Oil leaked from the chambers of hydraulic jacks of backlashes of valves, and they hit the air
| The noise will disappear after 15 minutes of engine operation when the crankshaft reaches a speed of 2000-3000 min -1
 | Do not increase the engine speed of the engine above 3000 min -1, as this may damage the hydraulic jacks of backlashes of valves |
|
Continuous noise in the frequency of idling after driving at high speed |
- The engine oil level is too low or too high
- A large amount of air dissolved in the oil after high speed
- Deterioration of motor oil
| - Check the engine oil level
- Check the oil supply
- Check the oil and, if necessary, replace it
|
The noise lasts longer than 15 minutes |
- The low pressure in the lubrication system
- Defective hydraulic jacks of backlashes of valves
| - Check the pressure in the lubrication system
- Remove the cylinder head and pressing the hydraulic jacks of backlashes of valves, check the value of compression
|
