3-32
ENGINE
PISTON RING FREE
END
GAP
AND
PISTON RING END
GAP
Measure the piston ring free end gap using the vernier calipers,
first, and then
fi
t the piston ring squarely into the cylinder
an
d
measure the piston ring end gap using t
he
thickness gauge.
If any measurement exceeds the service limit, replace the piston
ri
ng with a new one.
B 09900-20101 :
Vernier
calipers
~
Piston
ring
free
end
gap
Service
Limit
:
1st
: 5.5
mm
(0.22
In)
2nd
: 9.2
mm
(0.36
In)
i
ro&
i 09900-20803:
Thickness
gauge
~
Piston
ring
end gap
Service
Limit
:
1
st:
0.50
mm
(0.020 In)
2nd
: 0.50
mm
(0.020
in)
PISTON PIN
AND
PIN
BORE
Measure
the
piston
pin
bore diameter using the sma
ll
bore
gauge.
if
the diameter exceeds the service limit, replace the pis-
ton with a new one.
lib 09900-20602: Dial
gauge
(1/1000
mm)
09900-22403:
Small
bore
gauge
(18 -
35
mm
)
~
Piston pin bore
Service
Limit:
20.030 mm (0.7886 in)
Measure the piston pin outside diameter at three positions using
the micrometer.
If any measurement exceeds the service limit,
replace
the piston pin with a new one.
lib 09900-20205:
Micrometer
(0 -
25
mm)
_ Piston pin 0.0.
Service
Limit
: 19.980
mm
(0.7866 in)
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