(Table 12, contd)
Troubleshooting Test Steps Values Results
5. Turbocharger
This Test Step is applicable to engines with a single
turbocharger.
Note: The turbocharger that is installed on the engine is a non-
serviceable item. If any mechanical fault exists, then the faulty
turbocharger must be replaced.
A. Ensure that the mounting bolts for the turbocharger are
tight.
B. Check that the oil drain for the turbocharger is not blocked
or restricted.
C. Check that the compressor housing for the turbocharger is
free of dirt and debris. Make sure that the housing is not
damaged.
D. Check that the turbine housing for the turbocharger is free
of dirt and debris. Make sure that the housing is not damaged.
E. Check that the turbine blades rotate freely in the
turbocharger.
F. Ensure that the wastegate on the turbocharger is adjusted
correctly. Refer to Systems Operation, Testing, and Adjusting,
“Turbocharger - Inspect”. If the wastegate actuator is faulty, re-
place the turbocharger. Refer to Disassembly and Assembly,
“Turbocharger - Remove” and Disassembly and Assembly,
“Turbocharger - Install”.
Turbocharger Result: There is a fault on the turbocharger.
Repair: Repair the turbocharger or replace the turbocharg-
er. Refer to Disassembly and Assembly, “Turbocharger -
Remove” and Disassembly and Assembly, “Turbocharger -
Install”.
Result: The turbocharger is OK.
Proceed to Test Step 7.
6. Turbochargers
This Test Step is applicable to engines with twin turbochargers.
Note: The turbochargers that are installed on the engine are
nonserviceable items. If any mechanical fault exists, then the
faulty turbocharger must be replaced.
A. Ensure that the mounting bolts for the turbochargers are
tight.
B. Check that the oil drains for the turbochargers are not
blocked or restricted.
C. Check that the compressor housings for the turbochargers
are free of dirt and debris. Make sure that the housings are not
damaged.
D. Check that the turbine housings for the turbochargers are
free of dirt and debris. Make sure that the housings are not
damaged.
E. Check that the turbine blades rotate freely in the
turbochargers.
Turbochargers Result: There is a fault on one of the turbochargers.
Repair: Repair the faulty turbocharger or replace the faulty
turbocharger. Refer to Disassembly and Assembly, “Turbo-
charger - Remove” and Disassembly and Assembly, “Tur-
bocharger - Install”.
Result: The turbochargers are OK.
Proceed to Test Step 7.
(continued)
UENR4469-36 67
Symptom Troubleshooting
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