ENGINE
(B) Piston Pin and Brushing Clearance
1. Measure the piston pin O.D. with an outside
m i c r o m e t e r.
2. Measure the piston pin busing I.D. with an inside
m i c r o m e t e r.
3. If the clearance exceeds the allowable limit with
new bushing, replace the piston pin.
(C) Replacing Piston Pin Bushing
1. Press out the bushing, using a piston pin bushing
replacing tool.
2. Clean the new bushing and the bore and apply oil
to them.
3. Press in the bushing, using the replacing tool.
I M P O RTANT :
•
Align the oil holes of the connecting rod and the
b u s h i n g .
(D) Piston ring Gap
1. Push down the ring into the cylinder to the lower
limit of ring travel in the assembled engine with a
p i s t o n .
2. Measure the ring gap with a feeler gauge.
3. If the gap exceed the allowable limit, replace the
piston ring.
Piston Pin
Factory
0.014 to 0.038mm
and
spec.
0.00055 to 0.00150in.
bushing
Allowable
0.15mm
clearance
limit
0.0059in.
Piston Pin
Factory
25.002 to 25.011mm
O.D.
spec.
0.98433 to 0.98469in.
Bushing
Factory
25.025 to 25.040mm
I.D.
spec.
0.98524 to 0.98583in.
Factory
0.55 to 0.70 mm
2nd ring spec.
0.0217 to 0.0276 in.
Allowable 1.25 mm
Piston
limit
0.0492 in.
ring gap Top
Factory
0.25 to 0.40 mm
ring,
spec.
0.0098 to 0.0157 in.
oil ring
Allowable 1.25 mm
limit
0.0492 in.
