Troubleshooting

Table 36
Troubleshooting Test Steps
Values Results
1. EGR cooler
A. Check the EGR cooler for leaks for utilizing the “On Engine
Test Procedure” . Refer to Systems Operation, Testing and
Adjusting, “Exhaust Cooler (NRS) - Test”.
EGR Cooler Result : The EGR cooler has a leak.
Repair: Replace the EGR cooler. Refer to the Disassembly
and Assembly manual for the correct procedure.
Proceed to Step 5.
Result : The EGR cooler does not have a leak.
Proceed to Test Step 2.
2. Cylinder head gasket leak
A. Check the cylinder head gasket for leaks. Refer to the Sys-
tems Operation/Testing and Adjusting for the proper proce-
dure for checking the cylinder head.
Cylinder Head
Gasket
Result : The cylinder head gasket is leaking.
Repair: Replace the cylinder head gasket. Refer to the Disas-
sembly and Assembly manual.
Result : The cylinder head gasket is not leaking.
Proceed to Test Step 3.
3. Cylinder head
A. Check for cracks in the cylinder head. Perform a leak test
on the cylinder head. Refer to the Systems Operation/Testing
and Adjusting for the proper procedure for checking the cylin-
der head.
Cylinder Head Result : A crack is found in the cylinder head.
Repair: Repair the cylinder head and/or replace the cylinder
head. Refer to the Disassembly and Assembly manual.
Result :There are no cracks in the cylinder head.
Contact the Dealer Solution Network (DSN).
i06225084
Exhaust System Contains Oil
Probable Causes
• Extended idle times
• Failed turbocharger seals
• Worn valve guide seals or faulty valve guide seals
• Worn valve guides
• Worn piston rings
Complete the procedure in the order in which the
steps are listed.
UENR0612-07 89
Symptom Troubleshooting
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