7 main reasons for common vehicle oil leakage

1. Poor product (accessory) quality, material or workmanship; some problems in structural design.

2. Incorrect assembly speed, unclean mating surface, damaged gasket, displacement or installation does not comply with operating procedures.

3. Uneven tightening force of fastening nut, thread breakage or loosening and falling off, resulting in work failure.

4. Excessive wear, deterioration and deformation of sealing materials after long-term use.

5. Too much lubricating oil is added, the oil level is too high or the wrong oil is added.

6. The joint surface of parts (side covers, thin-walled parts) is bent and deformed, and the shell is damaged, resulting in lubricating oil leakage.

7. When the exhaust plug and check valve are blocked, oil leakage often occurs in the weak sealing parts due to the air pressure difference inside and outside the shell.