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Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Fuel and Water Ingress In Engine Oil - Inspect
If the engine operation is continued with fuel or water mixed in the engine oil, the engine oil viscosity will decrease
and this can cause serious problems such as bearing seizure.
Extract 1 to 2 L [0.26 to 0.53 U.S. gal.] of engine oil, and check for abnormal odor and discoloration to determine if
the oil is mixed with fuel and water.
If fuel is mixed, the oil will smell like fuel.
If water is mixed, oil may turn milky white.
If fuel or water is mixed with the engine oil, find the cause and repair. If you cannot repair, contact a dealer of
Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
If the coolant enters the engine oil during operation, moisture vapor is discharged from the breather. In such case,
locate the fuel or water leak, and repair properly.
Note: If oil leaks from oil cooler, oil will float in water in the freshwater tank. Also, LLC that is not miscible with oil will
accumulate at the bottom of oil pan.
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Troubleshooting
