It is normal for the turbocharger to emit a “whine” sound that varies in intensity depending on engine speed and
load. The sound is caused by the very high rotational speed of the rotor assembly. Consequently, the sound will
be more audible at full speed.
If possible, operate the engine at full speed to verify the noise level.
Leaks in the air system intake and/or exhaust components can produce additional noises.
Pressurize the intake system and check for air intake and crossover tube leaks.
Before rem oving the turbocharger, make sure that the noise complaint is not caused by leaks in the air system components.
Look for loose turbocharger mounting, exhaust manifold gasket leaks, and cracks in the exhaust manifold.
Lower pitch sounds or rattles at slower engine speeds canindicate debris in the system or the rotor assembly is
touching the housings.
