Marinediesel 5L V8, Owner'S Manual, Page: 169 / 248

167
HIGH OIL SUMP TEMPERATURE
PROBLEM CORRECTION/FURTHER DIAGNOSIS
ƒ
Incorrect oil level (high/low) and quality
(grade/viscosity/purity)
ƒ
Operation during extreme ambient
temperature (hot/cold)
ƒ
Oil cooler restricted or bypassed
ƒ
Oil filter bypassed
ƒ
Sticking oil pump pressure regulator valve
ƒ
High coolant temperature
ƒ
Remove or add oil to correct level; drain
and refill crankcase, if needed.
ƒ
Review normal operating procedures.
ƒ
Check oil flow through cooler system;
remove filter and check oil cooler bypass
valve operation.
ƒ
Remove filter and check oil cooler bypass
valve operation.
ƒ
Check oil pressure.
ƒ
Check cooling system for overheating.
LOW OIL PRESSURE
PROBLEM CORRECTION/FURTHER DIAGNOSIS
ƒ
Incorrect oil level (high/low) and quality
(grade/viscosity/purity)
ƒ
Operation during extreme ambient
temperature (hot/cold)
ƒ
Worn or damaged oil pump (gears, pick-up
tube/screen)
ƒ
Faulty oil pump drive or shaft
ƒ
Sticking oil pump pressure regulator valve
ƒ
Oil cooler restricted or bypassed
ƒ
Oil filter bypassed
ƒ
Lube passage leak into crankcase
ƒ
Inaccurate oil pressure gauge operation
ƒ
Remove or add oil to correct level; drain
and refill crankcase, if needed.
ƒ
Review normal operating procedures.
ƒ
Consult your dealer service manager.
ƒ
Consult your dealer service manager.
ƒ
Consult your dealer service manager.
ƒ
Check oil flow through cooler system;
remove filter and check oil cooler bypass
valve operation.
ƒ
Consult your dealer service manager.
ƒ
Check gauge circuit operation.
NOTE: Items underlined are the most likely cause of the condition.