3-42 ENGINE
Measure the piston pin outside diameter at three positions using
the micrometer. If any of the measurements are out of specifica-
tion, replace the piston pin.
) 09900-20205: Micrometer (0 – 25 mm)
( Piston pin O.D.
Service Limit: 17.980 mm
PISTON RING INSTALLATION
• Install the oil ring first, then the 2nd ring and finally the 1st
ring.
NOTE:
The 1st
1 and 2nd piston rings
2 differ in shape.
• The 1st
1 and 2nd
2 piston rings should be installed with the
mark facing up.
• First, install a spacer
3 into the oil ring groove and then install
the two side rails
4. The spacer and side rails do not have a
designated top and bottom. They can be installed in any posi-
tion.
$
INCORRECT
CORRECT
When installing the spacer, be careful not to allow its
two ends to overlap in the groove.
A
B
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