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Cylinder Head/Cylinder/Piston
Piston Inspection
M
easure the piston
O.D.
10 mm (0.39
in)
from the bottom of
the skirt and at a right angle to the piston pin
hole.
Service
Limit:
53.88 mm (2
.
121
in)
If the O.D. is under t he service limit, replace the
piston
with a
new one.
Calculate the piston-to-cylinder groove.
Service
Limit:
0.07 mm (0.003
in)
Remove the carbon deposits from the piston ring groove.
M
easure the piston ring-to-groove clearance.
Service
Limit:
0 .09 mm (0.004 in)
Measure the piston pin bore I.D.
Service Limit
:
15.022 mm
(0.5
914 in)
Check the piston pin for wear and excessive
discolorat
ion.
Measure the piston
pin
O.D.
Service
Limit:
14.980 mm (0.5898 in)
Insert the piston ring into t he cylinder.
Use the piston to push
the
ring squarely into the cylinder.
Measure the piston ring end gap with the
f
eeler gauge.
Service
Limit:
0 .65 mm (0.026
in)
7-8
RICIERED
I
I
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