(Table 26, contd)
Troubleshooting Test Steps Values Results
6. Incorrect Oil
A. Check that the engine is filled with oil of the correct specification.
Refer to the Operation and Maintenance Manual, “Refill Capacities
and Recommendations”.
Oil specification Result: The oil specification is incorrect.
Drain the engine oil system and refill the engine oil sys-
tem. Refer to Operation and Maintenance Manual, “En-
gine 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 sulfur
can lead to the formation of acids in the crankcase.
B. Obtain a fuel analysis.
Fuel and fuel
filters
Result: The fuel has contamination.
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).
i06003770
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.
64 UENR0612
Symptom Troubleshooting
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