Symptom: Oil Leak in Turbine Housing

Warning: The troubleshooting guide may only be conducted with the vehicle in drive-able condition. Please stop the trials at signs of engine malfunction such as black smoke, excessive oil consumption, or run-away engine.

 

Oil leaks can be caused by many factors, the main factor being incorrect pressure within the compressor and turbine housings. Oil leaks can cause vital damage to the bearing systems and occur within seconds of turbocharging.

 

Check for Boost Leaks:

Firstly, please check the following 4 points before inspection of the turbocharger.

  1. Compressor housing outlet, intercooler circuit, and connections.
  2. Turbine Housing inlet, manifold circuit, gasket, and connections.
  3. Turbine Housing outlet, dump pipe circuit, gaskets and connections.
  4. Compressor housing inlet, air filter clean situation and connections.

kinugawa turbo systems make sure that correct tightening of connections

 

When a turbocharger is installed correctly, it should NOT leak oil, however, there can be cases where oil leaks occur. The following highlights some of the main causes and signs of oil leaks:

Possible Cause

   

Possible Remedy

Restricted engine crankcase breather

   

Refer to engine manufacturer's manual, clear restriction

Turbocharger bearing housing sludged or coked

   

Change engine oil and oil filter, overhaul or replace turbocharger as required

Worn engine piston rings or liners

 

Refer to engine manufacturer's manual and repair as required

Burnt valves and/or pistons

 

Refer to engine manufacturer's manual and repair as required

Excessive dirt build up on compressor wheel and/or diffuser vanes

 

Clean in accordance with details/instructions from Kinugawa Turbo Systems

Turbocharger damaged

 

Find and correct cause of failure, repair or replace turbocharger as necessary

Restricted turbocharger oil drain line

 

Remove restriction or replace damaged parts as required

 

Final Checks:

  • Check for correct oil levels and pressure
  • Ensure air and oil drain systems are clear from blockages or restrictions
  • Check the exhaust system to make sure there are no leaks present
  • Do not use silicone on oil gaskets as it can easily become detached and block oil passages.
  • Ensure DPF (diesel particulate filter) and Catalytic converter are free of blockages.