Overhaul Manual
O-360 and IO-360 Series Engines
11
© March 2005 Superior Air Parts Inc.
72-00-13
Repair Procedures
REPAIR NO. 4
PAINTED PARTS
Painted Parts Repair
Some parts may have had paint removed from
either normal operation or during the cleaning
and inspection procedures. The new crankcase
and other aluminum cast components have
been alodined after machining and prior to any
hardware installation per MIL-C-5541, Class 1A.
Parts requiring the use of paint for protection
should be painted in accordance with the
following recommendations using material from
the list of approved materials. See Table 72-00-
15.6.
All paint used in these procedures should be
sprayed on. If it is necessary to brush the paint
on, extreme care must be exercised to prevent
excessive accumulation of paint in small corners
or void areas of the crankcase.
NOTE:
All machined bosses should be
masked before painting. Do not paint
areas under hold-down nuts or bolt
heads where torque is required.
Table 72-00-15.6 • Consumable Materials for Paint Procedures
Material Source
Resin-type enamel, AMS 3125C or equivalent MIL-E-7729
(such as Randolph Black #303)
Commercially Available
Toluene or equivalent AMS3180 (or equivalent Federal
Spec. TT-T-548)
Commercially Available
Zinc chromate primer Commercially Available
A. Aluminum and steel parts
(1) Clean and degrease all parts prior to
paint procedures.
WARNING
: SOLVENT IS TOXIC. USE IN
WELL-VENTILATED AREA. PREVENT EYE
AND SKIN CONTACT AND DO NOT
BREATHE VAPORS. IN CASE OF EYE
CONTACT, FLUSH WITH WATER FOR 15
MINUTES AND SEEK MEDICAL ATTENTION.
IN CASE OF SKIN CONTACT, WASH WITH
SOAP AND WATER.
(2) Apply one coat zinc chromate primer,
thinned with approximately 2 parts
toluene, and allow to air dry.
NOTE:
Parts from which the paint has not
been removed may be repainted
without the primer coat.
(3) Apply one coat of enamel and bake at
250°F for ½ hour. If allowed to air dry,
an inferior finish will result.
WARNING
: USE THE CORRECT PERSONAL
PROTECTION. HEATED PARTS WILL
CAUSE BURNS.
B. Cylinder Barrels
(1) Thoroughly clean all old paint from the
cylinder. A vapor degreaser is well
suited for this purpose.
(2) Superior Air Parts does not recommend
painting of cylinder heads for optimum
cooling. Only alodine is required for
cylinder head surface protection.
(3) Mask off the cylinder head, plug flange
bolt holes and cover cylinder bore.
NOTE:
Masking materials may include tape,
corks, plugs, foil, metal covers, etc.
(4) Spray a very light coat of zinc chromate
primer (0.0005 in. maximum thickness)
on the cylinder flange. A correct
thickness of paint will appear green with
a yellow tint and allow the metal to show
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