(Table 87, contd)
Troubleshooting Test Steps
Values Results
F. Ensure that the wastegate on the high-pressure turbocharg-
er is adjusted correctly. Refer to Systems Operation, Testing,
and Adjusting, “Turbocharger - Inspect”. If the wastegate ac-
tuator is faulty, replace the turbocharger. Refer to Disassembly
and Assembly, “Turbocharger - Remove” and Disassembly
and Assembly, “Turbocharger - Install”.
7. Low Compression (Cylinder Pressure)
A. Perform a compression test. Refer to Systems Operation,
Testing, and Adjusting, “Compression - Test ”.
Cylinder
compression
Result: The results of the compression test are outside the
specifications.
Repair: Investigate the cause and rectify any faults.
Note: Possible causes of low compression are shown in the
following list:
· Loose glow plugs
· Faulty piston
· Faulty piston rings
· Worn cylinder bores
· Worn valves
· Faulty cylinder head gasket
· Damaged cylinder head
Result: The results of the compression test are OK.
Proceed to Test Step 8.
(continued)
174 UENR4469-36
Symptom Troubleshooting
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