The leakage of turbocharger mainly includes the leakage of intake system, exhaust 

system and lubrication system. Especially often occurs in the compressor end of the 

supercharger accessories, because the compressor seal device by the impeller side 

is a low pressure area, prone to oil leakage. The main causes of supercharger oil 

leakage are as follows:

1. Failure of sealing device

The failure of the sealing device, especially the compressor end O-ring to lose the oil 

sealing effect, which directly leads to the leakage of lubricating oil into the compressor 

housing, at this time, the supercharger will be damaged due to the lack of oil lubrication, 

at the same time, the oil leakage into the vortex housing to form carbon deposition, 

affecting the normal operation.

2.Air filter dust blocking

The air filter element is not cleaned in time, resulting in excessive accumulation of 

dust and the formation of obstruction, resulting in the compressor inlet negative 

pressure is too high, in the compressor turbocharger impeller back negative pressure 

high and the formation of compression oil leakage.

3. The oil return pipeline is not smooth

If the oil pressure of the main oil passage is low, the return pipe is blocked or the pipeline 

is too thin, it will cause the oil return difficulty, and the high pressure will lead to the 

lubricating oil flowing along the rotating axis to both ends, eventually causing oil leakage. 

In addition, piston ring fracture or wear caused gas down to the crankcase, crankcase

ventilation pipe obstruction will also make the pressure of the oil pan increased, resulting 

in the supercharger due to oil return is not free and oil leakage.