Service Manual

ISB, ISBe and QSB (Common Rail [...] Air Leaks, Air Intake and Exhaust Systems
Section 10 - Air Intake System - Group 10 Page 10-23
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Compressor Housing Sealing Surface
Inspect for damage.
Clean surface with a clean cloth.
Exhaust System
Leaks in the exhaust system will cause the turbocharger
to operate at a lower speed, reducing the amount of air
going to the cylinders during engine operation.
Operate the engine at full throttle and rated rpm with
maximum load.
Leaks can be identified by noise, soapy water, or
discoloration caused by the escaping hot gases.
Leaks can be found at:
• Exhaust manifold gaskets