Turbocharger Internal Oil Leak Test

Turbocharger Internal Oil Leak Test

Component Test

NOTE: Some engine oil may be present in the turbocharger compressor inlet and in the air inlet components due to the crankcase breather system.

1. Check the turbocharger compressor inlet for evidence of oil. If excessive oil is present, this indicates that the failure could be in the engine or turbocharger. Procedures for checking the engine can be found in the Engine. To check the turbocharger, use the following turbocharger check.

2. If excessive oil is found in the turbocharger compressor outlet, check the CAC (Charge Air Cooler) for oil contamination. If contamination is present, flush the CAC (Charge Air Cooler). REFER to Charge Air Cooler (CAC) Cleaning .

3. Check the turbocharger turbine outlet for evidence of liquid oil. If excess liquid oil is present in the outlet, remove the turbocharger from the engine and examine the oil supply and return passages in the turbocharger, engine block and the turbocharger oil drain tube for restriction. If no restriction is found, install a new turbocharger.