Internal oil passages leak and/or
Check, repair. See Engine Repair
spray cooling jet missing
Pressure pipe from oil pump leaking
Check. See Engine Repair chapter.
Oil pump drive gear loose
Check, repair drive gear. See Engine
Oil pump gear and/or housing worn
Repair. See Engine Repair chapter.
Excessive main or connecting rod
High Engine Oil Pressure
Oil viscosity wrong (too thick)
Drain and refill with correct oil. See
Pressure regulating valve stuck or
Verify, repair. See Engine Repair
Piston cooling spray orifices plugged
Verify, clean. See Engine Repair
Anti-freeze in engine oil
Verify, repair, change oil.
Engine Uses Too Much Oil
Use correct oil. See Group 9000-04.
Oil level too high
Correct. Check to see if some other
fluid is leaking into oil.
Check engine oil drain plug.
Air cleaner plugged
Clean air cleaner elements or install
Remove, clean. See Engine Repair
Engine operating too hot or oil cooler
Test cooling system. See Group
water passage plugged
9010-25. Test thermostat. See
Engine Repair chapter.
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