Overhaul Manual
O-360 and IO-360 Series Engines
General Inspection Procedures
All journal surfaces must be checked for galling,
scores, misalignment, and out-of-round
condition. Pins and shafts must be inspected for
straightness.
Examine gears for evidence of pitting and
excessive wear. This evidence is of special
importance when found on the involute of the
gear teeth. Deep pit marks in this area are
reason to reject the part. Bearing surfaces of all
gears may have minor abrasions dressed out
with fine abrasive cloth but should be free from
deep scratches.
Excessively worn or mutilated threads should be
rejected. Small defects (such as slight nicks or
burrs) may be dressed out with a small file, fine
abrasive cloth (crocus cloth), or oil stone. If
distortion, galling, or mutilation resulting from
over tightening is discovered, the part must be
replaced.
Inspection of highly stressed areas for corrosion
is necessary. These areas are susceptible to
pitting and can cause failure of the part. The
following are components requiring particular
attention with respect to this issue: the fillets at
the edges of crankshaft main and crankpin
journal surfaces, and thrust bearing races. If
pitting is discovered in these areas and cannot
be removed by polishing with crocus cloth or
other fine abrasive, the part must be replaced.
For polishing procedures, see the Repairs
section of this manual.
Inspect all threaded inserts, fasteners, studs,
fittings, plugs, etc., for condition of threads.
General Non-Destructive Testing
All parts must be thoroughly clean and dry prior
to the start of the test and again upon
completion of the test procedures. Refer to
Cleaning section of this manual. It is important
to carefully consider the results of the test to
provide accurate interpretation.
All Ferro-magnetic steel parts should be
inspected using a magnetic particle inspection
method, such as MIL-STD-1949, performed by
appropriately qualified personnel. This
inspection is especially effective when used on
highly stressed parts such as keyways, gear
teeth, splines, roots of threads, small holes, and
fillets.
NOTE:
Perform the magnetic particle
inspection strictly in accordance with
the manufacturer’s guidelines. Failure
to do so can result in erroneous
readings and the reuse of critical
components with hidden damage that
may cause engine failure.
NOTE:
Care must be taken to prevent
overheating or burning of the part as a
result of the applied electricity during
this test.
Tests using the dye penetrant method must be
thoroughly cleaned of all penetrant and
developer residue upon completion of the test.
Any oils or other fluids used for other non-
destructive procedures must be thoroughly
cleaned from the part upon completion of the
test.
NOTE:
Upon completion of any cleaning
procedure, be sure to coat all steel
parts with preservative oil. Do not
handle cleaned parts any more than
necessary prior to their reassembly
into the engine as this handling
reintroduces dirt and corrosive
substances to the parts.
2
© March 2005 Superior Air Parts Inc.
72-00-08
Inspection and Check
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