Service Manual

Turbocharger ISB, ISBe and QSB (Common Rail [...]
Page 10-44 Section 10 - Air Intake System - Group 10
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• Push the rotor assembly toward the gauge and record
the reading.
HE221W, HE211W, and HE201W - Axial Clearance
mm in
0.010 MIN 0.0004
0.076 MAX 0.0030
HX40, H1E, HY30W, HX35W, and HY35W - Axial
Clearance
mm in
0.038 MIN 0.0015
0.093 MAX 0.0037
HX27/25W - Axial Clearance
mm in
0.057 MIN 0.0022
0.103 MAX 0.0040
Variable Geometry, HY35V - Axial Clearance
mm in
0.038 MIN 0.0015
0.093 MAX 0.0037
• Replace the turbocharger if the clearance does not
meet specifications. See the Remove and Install
sections in this procedure.
Radial Clearance Check:
• Inspect compressor wheel for signs of contact with
compressor housing. Replace turbocharger if evidence
of contact is present.
• Inspect the turbocharger compressor intake and
discharge for oil.
• If oil is present in the compressor intake as well as in
the discharge, check upstream of the turbocharger for
the source of the oil.
NOTE: Light oil and/or misting of the compressor intake is
acceptable on engines equipped with a closed crankcase
ventilation system, in which the crankcase in vented into
the air inlet piping.
NOTE: If the engine experiences a turbocharger failure or
any other occasion where oil is put into the charge-air
system, the charge-air system must be inspected and
cleaned. This includes the aftercooler assembly in Marine
engines. Refer to Procedure 010-027 in Section 10. Refer
to Procedure 010-005 in Section 10.