M11 Series – Service Manual – 010-049   Turbocharger Turbine Seal Leaks

Add one unit of fluorescent tracer, Part No. 3376891, to each 38 liters
[10.0 gal] of engine lubricating oil.

Operate the engine at low idle for 10 minutes.

Shut off the engine.

Allow the turbocharger to cool.

Remove the exhaust pipe from the turbine housing.

Use a high-intensity black light, Part No. 3377253 or 3377394, to inspect the turbine outlet for leaks.

A dark blue glow indicates a fuel leak.

Refer to Procedure 007-044. A yellow glow indicates an oil leak.

If oil is found on the turbine housing, remove the oil drain line and check for restrictions. Clear any restrictions found, or replace damaged components as required.

If the oil drain line is

not restricted, remove the turbocharger.

Refer to Procedure 010-033.

Use a high-intensity black light, Part No. 3824524 or 3824754, 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.

Refer to Procedure 010-033.

Install the exhaust pipe to the turbocharger, and tighten the clamp.

Operate the engine and check for air leaks.