TROUBLESHOOTING - 1C-2390-823225--1 1096
Low Oil Pressure
Cause Special Information
Low oil level in crankcase
Defective oil pressure gauge and/or sender
Verify with an automotive test gauge. Refer to
Section 4D for instrument testing.
Thin or diluted oil
Oil broken down; contains water or gas; wrong
viscosity; engine running too hot or too cold;
excessive idling in cold water (condensation)
Oil pump
Relief valve stuck open; pickup tube restricted;
worn parts in oil pump; air leak on suction side of
oil pump or pickup oil tube
Oil leak can be internal or external
Oil passage plugs leaking, cracked or porous
cylinder block
Excessive bearing clearance Cam bearings, main bearings, rod bearings
High Oil Pressure
Oil too thick Wrong viscosity, oil full of sludge or tar
Defective oil pressure gauge and/or sender Verify with an automotive test gauge
Clogged or restricted oil passage
Oil pump relief valve stuck closed
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