FIGURE
14.
PISTON
GROOVE
CLEANING
Inspection
Follow the procedures given below when inspecting
pistons and connecting rods.
Piston Inspection:
1.
Inspect the pistons
for
fractures at the ring
lands, skirts and pin bosses. Check for wear at
the ring lands using a new ring and feeler gauge
(Figure
15).
Replace the piston when the
side clearance of the top compression ring
reaches that specified in
DIMENSIONS AND
CLEARANCES.
2.
Replace pistons showing signs of scuffing,
scoring, worn ring lands, fractures
or
damage
from preignition. Excessive piston wear near the
edge of the
top
ring land indicates preignition.
FIGURE
15.
CHECKING RING SIDE CLEARANCE
Measuring Pistons:
Refer'
to
DIMENSIONS AND CLEARANCES
to
determine where
to
measure piston to be sure the
total clearance follows specifications.
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