Overhaul Manual
O-360 and IO-360 Series Engines
ADDITION TO BEING POTENTIALLY
DANGEROUS TO ALUMINUM AND
MAGNESIUM, MAY BECOME IMPREGNATED
IN THE PORES OF THE METAL AND CAUSE
OIL FOAMING WHEN THE ENGINE IS
RETURNED TO SERVICE. WHEN USING
THESE WATER-MIXED SOLUTIONS ALWAYS
THOROUGHLY RINSE THE PART IN CLEAN
BOILING WATER. REGARDLESS OF
METHOD OR SOLUTION USED ALWAYS
COAT AND SPRAY ALL PARTS WITH
LUBRICATING OIL IMMEDIATELY AFTER
CLEANING IN ORDER TO PREVENT
CORROSION.
CAUTION
: USE THE CORRECT PERSONAL
PROTECTION. HEATED PARTS WILL CAUSE
BURNS.
Decarbonizing
Decarbonizing is usually accomplished by
immersion of the part in a decarbonizing solution
(usually heated). Decarbonization solutions
such as Gunk, Penetrol, Carbrax, Super-
Chemco, Gerlach No. 70 or any suitable
solution. Refer to the above caution for water-
soluble decarbonizers. Remove hard carbon
deposits after degreasing by brushing, scraping
or grit blasting. After cleaning, rinse the parts in
petroleum solvent, dry, and remove loose
particles by blowing the particles out with
compressed air. Use a shop air supply with an
appropriate water trap.
Decarbonizing solutions will usually remove
most of the enamel from machined surfaces. All
remaining enamel should be removed by grit
blasting particularly in the narrow areas between
cylinder cooling fins.
Valve seats may be left unprotected during
decarbonizing processes. This will facilitate the
reconditioning of the valve seat in later
procedures.
CAUTION
: EXTREME CAUTION SHOULD BE
EXERCISED WHEN USING A
DECARBONIZING SOLUTION. IT IS
RECOMMENDED THAT THE USE OF HEATED
SOLUTIONS BE AVOIDED UNLESS THE
OPERATOR IS THOROUGHLY FAMILIAR
WITH THE PARTICULAR SOLUTION BEING
USED. IN ADDITION THE OPERATOR IS
STRONGLY ADVISED AGAINST IMMERSING
STEEL AND MAGNESIUM PARTS IN THE
SAME DECARBONIZING TANK, BECAUSE
THIS PRACTICE OFTEN RESULTS IN
DAMAGE TO THE MAGNESIUM PARTS FROM
CORROSION.
CAUTION
: DO NOT DAMAGE MACHINED
SURFACES. MASK ALL MACHINE
SURFACES PLUG ALL DRILLED OIL
PASSAGES TO PREVENT DAMAGE OR
ENTRY OF FOREIGN MATTER.
CAUTION
: WHEN YOU USE COMPRESSED
AIR TO CLEAN OR DRY PARTS, MAKE SURE
THAT THE PRESSURE IS NOT MORE THAN
20 PSI. DO NOT DIRECT THE AIRSTREAM
AT PERSONNEL OR LIGHT OBJECTS. PUT
ON GOGGLES OR A FACE SHIELD TO
PROTECT YOUR EYES. THIS WILL HELP
PREVENT INJURIES TO PERSONNEL OR
DAMAGE TO THE EQUIPMENT. IF YOU GET
AN EYE INJURY, SEEK MEDICAL ATTENTION
CAUTION
: DO NOT USE WIRE BRISTLE
BRUSHES OR METAL SCRAPERS ON ANY
BEARING, MACHINED OR CONTACT
SURFACES.
CAUTION
: DO NOT USE GRIT BLASTING ON
THE PISTON RING GROOVES. USE A
WOODEN SCRAPER.
Scratch and Corrosion Removal
Remove corroded or pitted surfaces on the fillets
at the edges of crankshaft main and crankpin
journal surfaces, and thrust bearing races by
polishing with crocus cloth or other mild abrasive
material. Refer to the Fits and Clearances
section of this manual for limits.
Shallow or small scratches, minor abrasions, or
pitting on gears or screwed fittings may be
dressed out with a fine abrasive (crocus) cloth,
small file, or polishing stone. Refer to the Fits
and Clearances section of this manual for limits.
Accessory Mounts
Clean mounting pads and studs by wiping with a
clean cloth moistened with solvent. Use care to
remove sludge and debris from around the
bases of the studs.
2
© March 2005 Superior Air Parts Inc.
72-00-07
Cleaning
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