SECTION 6
LYCOMING OPERATOR’S MANUAL
TROUBLE-SHOOTING
IO-320 SERIES
TROUBLE
PROBABLE CAUSE
REMEDY
High Oil Temperature (Cont.)
Low grade of oil
Replace with oil conforming to
specifications.
Clogged oil lines or strainers
Remove and clean oil strainers.
Excessive blow-by
Usually caused by worn or stuck
rings.
Failing or failed bearings
Examine sump for metal particles.
If found, overhaul of engine is
indicated.
Defective temperature gage
Replace gage.
Excessive Oil Consumption
Low grade of oil
Fill tank with oil conforming to
specifications.
Failing or failed bearings
Check sump for metal particles.
Worn piston rings
Install new rings.
Incorrect installation of piston
rings
Install new rings.
Failure of rings to seat (new
nitrided cylinders)
Use mineral base oil. Climb to
cruise altitude at full power and
operate at 75% cruise power
setting until oil consumption
stabilizes.
6-4
Summary of Contents for AIO-320
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