Troubleshooting

(Table 26, contd)
Troubleshooting Test Steps
Values Results
6. Incorrect Oil
A. Check that the engine is filled with oil of the correct specifica-
tion. Refer to the Operation and Maintenance Manual, “Refill Ca-
pacities and Recommendations”.
Oil specification Result: The oil specification is incorrect.
Repair: Drain the engine oil system and refill the engine
oil system. Refer to Operation and Maintenance Manual,
“Engine Oil and Filter - Change”.
Result: The oil specification is correct.
Proceed to Test Step 7.
7. Dirt in Fuel
A. Remove the fuel filters. Inspect the fuel filters for
contamination.
Note: Contaminants in the fuel such as hydrogen sulfide and sul-
fur can lead to the formation of acids in the crankcase.
B. Obtain a fuel analysis.
Fuel and fuel
filters
Result: The fuel has contamination.
Repair: Determine the cause of any contamination and
make the necessary repairs.
Install new fuel filters. Refer to the Operation and Mainte-
nance Manual.
Result: The fuel is not contaminated.
Contact the Dealer Solution Network (DSN).
i06704802
Engine Has Mechanical Noise
(Knock)
Probable Causes
• Diagnostic codes
• Electrical connections
• Fuel quality
• Correct lubrication
• Engine accessories
• Valve train components
• Gear train and lower end components
• Crankshaft
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
UENR0612-07 67
Symptom Troubleshooting
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