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 ENGINE
Figure 21.
PISTONS AND RODS
A. REMOVAL
Figure 20.
1. Ridge ream the cylinders to remove the unworn
area at the top so that the new rings when assembled
CHECKING BORE WEAR
will not bump and distort both themselves and the piston
lands. (Fig. 22)
A. Clean the ring of carbon from around the top of
the cylinder formed above the travel of the top ring.
B. Determine the original diameter of the cylinder
by checking the unworn area with inside micrometer
at intervals of approximately 45 . (Fig. 21)
C. Check in same manner the top of the ring travel
area approximately 1/4" below the shoulder.
D. The maximum difference in the above checks,
indicates the amount of cylinder wear. If less than .008"
reringing will be suitable; and if over .008", rebore.
Figure 22.
B-7
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