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.