Figure 3-104. 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° cross hatch 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 cross hatch 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° cross hatch pattern in the piston
travel area is the most important.
The angular cross hatch 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. (00536b)
Failure to remove all abrasive particles may result in pre-
mature cylinder, piston and ring wear and engine failure.
(00537b) .
3-74 2008 Dyna Service: Engine
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