Inspect the turbocharger compressor inlet and discharge for oil.
If oil is present in the compressor intake , as well as in the discharge, check upstream in the turbocharger for the
source of the oil.
Engines equipped with a closed crankcase ventilation system can exhibit some oil misting of the compressor
blades. This is normal and does not signify turbocharger damage. If oil is pooling in the turbocharger cavities or the
charge-air cooler cavities, inspect the closed crankcase ventilation system for leaks, filter element damage, or
plugging.
If the crankcase pressure is within specifications, replace the turbocharger. See the Remove and Install sections of
this procedure.
NOTE: If the engine experiences a turbocharger malfunction that resulted in coolant or oil entering the intake, the charge-air cooler system, as well as the EGA differential pressure cross drillings, should be inspected and cleaned. Clean and inspect the charge-air cooler.
Refer to Procedure 01 0-027 in Section 10. Clean and inspect the EGA differential pressure cross drillings. Refer
to Procedure 01 0-080 in Section 1 0.
NOTE: If the engine experiences a turbocharger malfunction or any other occasion where oil is put into the Cummins® Particulate Filter, the Cummins® Particulate Filter must be inspected. Refer to Procedure 011-041 in
Section 11.
Add one unit of fluorescent tracer, Part Number 3376891, to each 38 liters [1 0 gal] of engine lubricating oil.
Operate the engine at low idle for 10 minutes.
NOTE: Do not operate the engine with the charge-air piping removed. The lack of boost pressure on the outlet
side of the compressor can cause progressive damage to the turbocharger.
Shut the engine OFF.
Allow the turbocharger to cool.
Remove the exhaust pipe from the turbine housing. See the Remove section of this procedure.
Use a high-intensity black light, Part Number 3163339, to inspect the turbine outlet for leaks.
A yellow glow indicates an oil leak.
If oil is found in the turbine housing, remove the oil drain line and check for restrictions. Refer to Procedure 01 0-045 in Section 1 0.
Clear any restrictions found.
Install the drain line and new a-ring seals into the engine block. Refer to Procedure 010-045 in Section 10.
If the oil drain line was not restricted, measure the crankcase pressure (blowby). Refer to Procedure 014-010
in Section 14.
If these checks do not reveal the problem, remove the turbocharger. See the Remove and Install sections of this
procedure.
Use a high-intensity black light, Part Number 3163339, to inspect the turbine inlet for leaks.
A yellow glow indicates an oil leak from the engine.
If a yellow glow is not seen in the turbine inlet, replace the turbocharger. See the Remove and Install sections of this
procedure.
If a yellow glow is seen, reference troubleshooting tree “Lubricating Oil Consumption Excessive” in the TS
Section.
Install the exhaust pipe to the turbocharger turbine outlet and tighten the clamp. See the Install section of this
procedure.
Install the intake pipe to the turbocharger compressor inlet and tighten the clamp. See the Install section of this
procedure.
