ENGINE
EA330-E4, WSM
1-S51
Replacing Piston Pin Bushing
(When removing)
1. Press out piston pin bushing with a piston pin bushing replacing
tool.
(When installing)
1. Clean the new bushing and bore, and apply engine oil to them.
2. Insert a new bushing onto the tool and press-fit it with the press
so that the oil holes (2) are aligned as shown in the figure, until
it is flush with the connecting rod.
3. Drill a hole to the bushing with aligning the oil hole (2) of
connecting rod using 4.0 mm dia. (0.16 in. dia.) drill.
• Be sure to chamfer the oil hole circumference with an oil
stone.
• Check that the seam (1) of the bushing positions as shown
in the figure.
(Reference)
• Service parts dimension:
9Y1211018ENS0087US0
Connecting Rod Alignment
• Since the piston pin bushing I.D. is the basis of this check,
check bushing for wear beforehand.
1. Remove the connecting rod bearing and install the bearing cap.
2. Install the piston pin into the connecting rod.
3. Install the connecting rod on the connecting rod alignment tool.
4. Put a gauge over the piston pin and move it against the face
plate.
5. If the gauge does not fit squarely against the face plate,
measure the space between the pin of the gauge and the face
plate.
6. If the measurement exceeds the allowable limit, replace the
connecting rod.
9Y1211018ENS0088US0
Oil clearance between
piston pin and bushing
Factory specification
0.015 to 0.075 mm
0.00059 to 0.0029 in.
Allowable limit
0.15 mm
0.0059 in.
Piston pin O.D.
Factory specification
20.002 to 20.011 mm
0.78748 to 0.78783 in.
Piston pin bushing I.D.
20.026 to 20.077 mm
0.78843 to 0.79043 in.
(1) Seam
(2) Oil Hole
(A) When Removing
(B) When Installing
(a) 0.79 rad (45 °)
Bent "A"
Allowable limit
0.05 mm / 100 mm
0.002 in. / 3.94 in.
Twist "B"
0.05 mm /100 mm
0.002 in. / 3.94 in.
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