Installation & Operation Manual
O-360 and IO-360 Series Engines
4
© March 2004 Superior Air Parts Inc. Chapter 7 • Abnormal Operating Procedures
7. LOW OIL PRESSURE ON ENGINE GAGE
8. HIGH OIL TEMPERATURE
9. EXCESSIVE OIL CONSUMPTION
Table 7-7 • Low Oil Pressure On Engine Gage
Probable Cause Correction
Lack of oil Add to proper level.
Air lock or dirty relief valve Clean relief valve.
Leak in line Inspect gasket between accessory housing and
crankcase.
High oil temperature See "High Oil Temperature" in "Trouble"
column.
Defective pressure gage. Replace defective gage.
Stoppage in oil pump intake passage Check line for obstruction. Clean suction
strainer.
Table 7-8 • High Oil Temperature
Probable Cause Correction
Insufficient air cooling Check air inlet and outlet for deformation or
obstruction.
Insufficient oil supply Fill to proper level with specified oil.
Low grade of oil Replace with oil conforming to specifications.
Clogged oil lines or strainers Remove and clean oil strainers.
Excessive blow-by Check condition of engine rings. Replace if worn
or damaged.
Failing or failed bearing Examine sump for metal particles. If found,
engine overhaul may be required.
Defective temperature gage Replace gage.
Table 7-9 • Excessive Oil Consumption
Probable Cause Correction
Low grade of oil Fill tank with oil of proper weight and grade.
Failing or failed bearings Check sump oil for metal particles.
Worn piston rings Install new rings.
Incorrect installation of piston rings Install new rings.
Failure of rings to seat on new cylinders Use mineral base oil. Climb to cruise altitude at
full power and operate at 75% cruise power
setting until oil consumption stabilizes. See
Break-In Procedures, Special Procedures
Section Chapter 5.
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