Troubleshooting

(Table 53, contd)
Troubleshooting Test Steps
Values Results
6. Turbocharger
Note: The turbocharger that is installed on this engine is a
nonserviceable item. If any mechanical fault exists, then the
turbocharger must be replaced.
A. Check that the oil drain for the turbocharger is not blocked
or restricted.
B. Check the turbocharger for evidence of an internal oil leak.
Turbocharger Result: The oil drain for the turbocharger is blocked or
restricted.
Repair: Remove the blockage or restriction. If necessary, re-
place the oil drain line.
Result: The turbocharger has an internal oil leak.
Repair: Replace the turbocharger.
Result: The turbocharger is OK.
Proceed to Test Step 7.
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.
Contact the Dealer Solution Network (DSN).
i06226024
Oil Contains Coolant
Probable Causes
• Engine oil cooler
• Cylinder head gasket
• Cylinder head
• Cylinder block
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
112 UENR0612-07
Symptom Troubleshooting
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