Inspection
1. Piston
pin
and bearing inspection.
a. Check the piston pin
for
signs
of
wear.
If
any wear is evident, replace the pin
and the bearing.
b. Check the
pin
and bearing
for
signs
of
heat discoloration.
If
excessive
(indenta-
tion
on pin, etc.), replace the pin and the
bearing.
c. Check the small-end bearing
for
exces-
sive wear or
damage.
Check the rollers
for
signs
of
flat
spots.
If
such wear is
found, replace the pin and the bearing.
d.
Apply
a light
film
of
oil
to
the pin and
bearing surfaces. Install them in the
connecting rod small end to inspect
for
wear. Check
for
play. There should be
no noticeable vertical play.
If
play exists,
check the connecting rod small end
for
wear. Replace pin, connecting rod and/
or
bearing, as required.
2-7
e. The piston pin should have no noticeable
free play in the piston.
If
the piston pin
is loose, replace the pin and/or piston.
2. Piston
a. Remove the piston rings.
b. Remove any carbon deposits from piston
crown.
c. Carefully remove any carbon deposits
from the ring grooves.
d. Hernove score marks and lacquer
deposits from the sides
of
the piston
using 600
-- 800
grit
wet sandpaper.
Sand in a crisscross pattern. Do
not
sand
excessively.
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