sm02532
Figure 3-61. Measure for Out-of-Round and Taper
DEGLAZING CYLINDER
NOTE
Deglazing removes wear patterns, minor scuff marks and
scratches without enlarging the bore diameter.
1.
Lightly swab the cylinder bore with a cloth dipped in clean
engine oil.
2.
Obtain a 240 grit flexible ball-type deglazing tool with a
bristle tip or finishing stone arrangement able to produce
a 60 degree crosshatch pattern.
3.
Install the deglazing tool in a slow-speed drill. The speed
at which the tool rotates determines the speed at which it
must be stroked up and down the bore to produce the
desired crosshatch pattern.
4.
Starting at the bottom of the cylinder, move the deglazing
tool up and down the entire length of the cylinder bore for
10 to 12 complete strokes.
5.
Stop to examine the cylinder bore and/or take measure-
ments. A precise 60 degree crosshatch pattern in the
piston travel area is the most important.
The angular crosshatch pattern ensures an even flow of
oil onto the cylinder walls and promotes longer cylinder,
piston and ring life. An incorrect cross hatch pattern will
result in insufficient oil retention and possible piston
seizure and/or high oil consumption. (00536c)
Failure to remove all abrasive particles may result in pre-
mature cylinder, piston and ring wear and engine failure.
(00537c)
6.
Thoroughly wash the cylinder bore with liquid dishwashing
soap and hot water to remove all abrasive particles and
residual grit. Continue cleaning until a clean cloth shows
no evidence of dirt or debris.
7.
Hot rinse the cylinder and dry with moisture free com-
pressed air. Immediately apply a thin film of clean engine
oil to a clean white paper towel and thoroughly wipe the
inside of the cylinder to prevent the cylinder bore from
rusting.
NOTE
After wiping the cylinder with a clean, oiled paper towel, the
towel will be dark with contamination. Repeat this process
using a new lightly oiled paper towel each time until the towel
remains white. The cylinder is now clean.
8.
With the cylinder at room temperature, check the piston
clearance in the cylinder in which the piston will run. See
3.22 PISTON, Inspection
.
BORING AND HONING CYLINDER
1.
Bore cylinder with gaskets and torque plates attached.
Bore the cylinder to 0.003 in. (0.08 mm) under the desired
finished size. Refer to
Table 3-38
or
Table 3-39
.
An incorrect crosshatch pattern or too fine a hone will
result in insufficient oil retention and possible piston
seizure and/or high oil consumption. (00538c)
2.
Honing the cylinder:
a.
Hone the cylinder to its finished size using a 280 grit
rigid hone followed by a 240 grit flexible ball hone.
b.
Honing must be done with the torque plates attached.
c.
All honing must be done from the bottom (crankcase)
end of the cylinder. Work for a 60 degree crosshatch
pattern.
3.
Stop frequently to examine the cylinder bore and/or take
measurements.
Remember,
a
precise
60
degree
crosshatch pattern in the piston travel area is important.
NOTE
Example: A 0.005 in. (0.13 mm) oversize piston for a Twin Cam
96 will have the proper running clearance with a cylinder bore
size of 3.7550-3.7555 in. (95.377-95.390 mm).
Failure to remove all abrasive particles may result in pre-
mature cylinder, piston and ring wear and engine failure.
(00537c)
4.
Thoroughly wash the cylinder bore with liquid dishwashing
soap and hot water to remove all abrasive particles and
residual grit. Continue cleaning until a clean cloth shows
no evidence of dirt or debris.
5.
Hot rinse the cylinder and dry with moisture free com-
pressed air. Immediately apply a thin film of clean engine
oil to a clean white paper towel and thoroughly wipe the
inside of the cylinder to prevent the cylinder bore from
rusting.
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3-54 2013 Softail Service: Engine