Overhaul Manual
O-360 and IO-360 Series Engines
15
© March 2005 Superior Air Parts Inc.
72-00-13
Repair Procedures
REPAIR NO. 6
CYLINDER INTERIOR SURFACE
Cylinder Interior Surface Reconditioning
The Superior Vantage O-360 AND IO-360 series
engines utilize cylinders constructed of through-
hardened steel. These do not include nitride-
hardened or chrome plated interior surfaces.
WARNING: USE THE CORRECT PERSONAL
PROTECTION. POLISHING AND GRINDING
WILL CAUSE LOOSE PARTICLES THAT CAN
GET IN YOUR EYES.
CAUTION
: DO NOT ALLOW THE HONING
WHEEL TO RUN PAST THE BARREL MORE
THAN 1/8 IN. INTO THE COMBUSTION
CHAMBER.
1) Place the cylinder on a honing stand. If
the cylinder exceeds allowable service
limits in taper, diameter, or out-of-
roundness, regrind to 0.010 oversize.
2) Recommended equipment information
for honing is as follows:
(a) Wheel:
• Friable bond material – 2A;
grain size – 54; grade – K;
structure – 5 porous; vitrify bond
treatment – V92; diameter – 3 ½
to 4 inches.
(b) Wheel speed:
• 3 ½ inch wheel: 5600 to 6000
surface feet per minute.
• 4 inch wheel: 5350 to 5730
surface feet per minute.
(c) Work speed: 250 RPM.
3) Oversize allowance is determined by
adding 0.004 in. to the barrel diameter
at the point of greatest wear. This must
not exceed 0.002 in. per wall. Grind the
barrel to the oversize above this
amount.
4) Grind the surface of the steel barrel to
25-35 microinches. This can be
obtained by grinding the barrel diameter
to within 0.0005 to 0.001 in. of the
desired ID with rough-in cuts.
5) Redress the wheel and make a finish
pass. Allow the wheel to run over the
work up to five more times to ensure a
proper surface finish.
NOTE:
The surface finish must be properly
crosshatched along the entire length of
the barrel. The crosshatch pattern
must be 35°-37° from a line parallel
with the cylinder base. Refer to Figure
72-00-13.3.
6) If oversizing must occur, the cylinder
must be fitted with P010 (.010 in.)
oversize pistons and piston rings.
These must be used in opposing pairs
to maintain the dynamic balance of the
engine.
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