Service Manual

ISB, ISBe and QSB (Common Rail [...] Air Leaks, Air Intake and Exhaust Systems
Section 10 - Air Intake System - Group 10 Page 10-21
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Replace damaged pipes and tighten loose clamps, if
necessary, to make sure the air inlet system does not
leak.
Torque Value: 10 N•m [ 89 in-lb ]
Check for corrosion of the inlet system piping under the
clamps and hoses. Corrosion can allow corrosive
products and dirt to enter the intake system.
Disassemble and clean as required.
Pressure-Side Intake System
Leaks in the intake system will reduce the amount of air to
the cylinders during engine operation and decrease
engine performance.
Operate the engine at full throttle and rated rpm with
maximum load.
Listen for a high-pitched whistling noise from the
turbocharger, nearby piping, and connections.
Apply a soapy water solution to sealing surfaces and
inspect for bubbles.
Leaks can also be found at the turbocharger outlet
connection.
Inspect for damage, replace sealing o-ring, and tighten
loose clamps.
Torque Value: 10 N•m [ 89 in-lb ]