10-12
Cylinder Bore Deglazing
Before installing new rings, deglaze the cylinder
bore. Make sure that there are no scuff marks and
no wear or out-of-round beyond the specifications.
Deglazing gives a fine finish but does not enlarge
the cylinder diameter, so the original pistons with
new rings can be used.
The reason for deglazing a cylinder is to provide
cavities to hold oil during piston ring break-in.
1. Wipe the cylinder bore with a clean cloth that
has been dipped in clean, light engine oil.
2. Use a brush type deglazing tool with coated
bristle tips to produce a crosshatch pattern in
the cylinder bore.
3. The deglazing tool should be driven by a slow
speed drill. Move the deglazing tool up and
down in the cylinder rapidly enough to obtain a
crosshatch pattern as shown in Figure 10-21.
CAUTION
Never use gasoline or commer-
cial cleaners to clean cylinder bore after de-
glazing or honing. These solvents will not
remove abrasives from cylinder wall. Abra-
sives that are not removed from the cylin-
der will rapidly wear rings, cylinder wall and
bearing surfaces of all lubricated parts.
4. Clean the cylinder bore thoroughly with soap,
water, and clean rags. Continue cleaning until
a clean white rag shows no discoloring when
wiped through the cylinder bore.
Piston, Rings, and Connecting Rod
The piston has two compression rings and one oil
control ring. Remove these rings from the piston us-
ing a piston ring expander as shown in Figure
10-22.
C1091s
PRODUCE CROSS
HATCH SCRATCHES FOR
FAST RING SEATING
AVOID THIS FINISH
FIGURE 10-21. CROSSHATCHING
CT-1059-1s
PISTON RING
EXPANDER
FIGURE 10-22. REMOVING PISTON RINGS
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