Overhaul Manual
O-360 and IO-360 Series Engines
Table 72-00-03.9 • 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 72-00-03.10 • 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 of this manual.
Oil siphoned from engine in flight Insure that oil filler cap is tight and that o-ring is
in good condition. Insure that breather hose exit
is cut and located to avoid creating a vacuum in
the breather hose.
4
© March 2005 Superior Air Parts Inc.
72-00-03
Testing and Fault Isolation
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