i05955289
Oil Consumption Is Excessive
Probable Causes
• Misreading oil level
• Oil leaks
• Engine crankcase breather
• Oil level
• Air intake and exhaust system
• Turbocharger
• Low compression (cylinder pressure)
Recommended Actions
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
Table 53
Troubleshooting Test Steps Values Results
1. Misreading Oil Level
A. Accurately measure the consumption of oil and fuel over a
period of 50 engine hours.
Oil level Result: The oil consumption is less than 0.1% of the fuel
consumption.
Oil consumption is within specification. Return the unit to
service
Result: The oil consumption is greater than 0.1% of the fuel
consumption.
Proceed to Test Step 2.
2. Oil Leaks
A. Check for evidence of oil leaks on the engine.
B. Check for evidence of oil in the coolant.
Oil leaks Result: An oil leak is identified.
Rectify the cause of the oil leak.
Result: Oil is present in the coolant.
Refer to Troubleshooting, “Coolant Contains Oil”.
No oil leaks are identified
Proceed to Test Step 3.
(continued)
UENR0612 107
Symptom Troubleshooting
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