Service Manual

ISB, ISBe and QSB (Common Rail [...] Turbocharger
Section 10 - Air Intake System - Group 10 Page 10-45
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• If heavy deposits and/or streaks of oil are present only
in the discharge side, install the air inlet and charge-air
cooler piping to check the air restriction indicator.
Reference the equipment manufacturer service
information.
• Check for air intake restriction. Refer to Procedure
010-031 in Section 10.
• If no intake restriction is found, replace the
turbocharger. See the Remove and Install sections in
this procedure.
Leak Test
• Add one unit of fluorescent tracer, Part Number
3376891, to each 38 liters [10 gal] of engine lubricating
oil.
• Operate the engine at low idle for 10 minutes.
CAUTION
On Marine applications, before disconnecting the
exhaust outlet piping, be sure to fasten the piping
above the water level to prevent the vessel from
taking on water and possibly sinking.
• Turn engine OFF.
• Allow the turbocharger to cool.
• Remove the exhaust pipe from the turbine housing.
Use a high-intensity black light, Part Number 3163338, to
inspect the turbine outlet for leaks.
• A yellow glow indicates an oil leak.
• A dark blue glow indicates fuel in the oil.