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C. CONNECTING ROD AND PISTON
► PISTON PIN BORE
1. Measure the I.D. of the piston pin bore in the piston
(lengthwise and widthwise of the piston) with a cylinder
gauge.
2. If the measurement exceeds the allowable limit, replace
the piston.
► PISTON PIN AND BUSHING CLEARANCE
1. Measure the piston pin O.D. with an outside microm-
eter.
2. Measure the piston pin bushing I.D. with an inside mi-
crometer.
3. If the clearance exceeds the allowable limit, replace the
bushing.
4. If the clearance still exceeds the allowable limit after
replacing the bushing, replace the piston pin.
► REPLACING CONNECTING ROD SMALL END
BUSHING
1. Press out the bushing using a connecting rod small end
bushing replacing tool.
2. Clean the new bushing and bore. And apply oil to them.
3. Press in the bushing using the replacing tool.
• Align the oil holes of the connecting rod and bushing.
IMPORTANT
Factory spec. Allowable limit
25.000 ~ 25.006 mm
0.984 ~ 0.984 in.
25.05 mm
0.986 in.
Factory spec. Allowable limit
Piston pin
and
bushing
clearance
0.014 ~ 0.038 mm
0.001 ~ 0.003 in.
0.15 mm
0.006 in.
Piston pin
O.D.
25.002 ~ 25.011 mm
0.984 ~ 0.985 in.
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Bushing I.D.
25.025 ~ 25.040 mm
0.985 ~ 0.986 in.
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