To make the center line of turbocharger oil inlet and outlet as vertical as possible to ensure a smooth oil return.

1.Due to the turbocharger is under high speed with high precision components,therefore,please do not disassemble unless necessary situation. 

2.Please never use the actuator rod as handle.

A.Mechanical seal mechanisam is normal    B.Sealing function is normal,the internal pressure of bearing housing is not higer than the air pressure at both ends,oil can not flow to the high pressure chamber from the low pressure chamber.

1.The surface of compressor wheel was damaged by abnormal objects   A.Poor sealing of air intake pipe,air directly goes into the compressor without going through air filter.   B.Do not replace the air filter regularly or use fake filters.

Journal bearing,thrust bearing,main shaft and whole of bearing housing journal bearing abrasion caused by dirty oil,poor oil quality and used non-required grade oil.

1.  Air leakage noise    A.  Air leakage at engine exhaust manifold,turbine wheel and tail pipe,check according to exhaust trace    B.  Air leakage at engine intake manifold or compressor end,check by soapy water.