Piston And Connecting Rod - wsm M108S Workshop Manual

M108S, WSM

(3) Piston and Connecting Rod

Oil Clearance of Balancer Shaft Journal
1. Measure the balancer shaft journal O.D. with an outside
micrometer.
2. Measure the cylinder block bore I.D. (A), (B) for balancer shaft
with an inside micrometer.
3. If the clearance exceeds the allowable limit, replace the balancer
shaft.
Factory spec.
Oil clearance of
balancer-shaft journal
Allowable limit
Balancer-shaft journal
Factory spec.
O.D.
Balancer-shaft bearing
Factory spec.
I.D. (A), (B)
(A) Balancer-shaft Bearing I.D.
Piston Pin Bore I.D.
1. Measure the piston pin bore I.D. in both the horizontal and
vertical directions with a cylinder gauge.
2. If the measurement exceeds the allowable limit, replace the
piston.
Factory spec.
Piston pin bore I.D.
Allowable limit
Oil Clearance between Piston Pin and Small End Bushing
1. Measure the O.D. of the piston pin where it contacts the bushing
with an outside micrometer.
2. Measure the I.D. of the piston pin bushing at the connecting rod
small end with a cylinder gauge.
Calculate the oil clearance.
3. If the clearance exceeds the allowable limit, replace the
connecting rod.
If it still exceeds the allowable limit, replace the piston pin.
Factory spec.
Oil clearance between
piston pin and small end
bushing
Allowable limit
Piston pin O.D. Factory spec.
Small end bushing I.D. Factory spec.
1-S59
ENGINE
0.0700 to 0.159 mm
0.00276 to 0.00625 in.
0.2 mm
0.008 in.
50.920 to 50.940 mm
2.0048 to 2.0055 in.
51.01 to 51.08 mm
2.009 to 2.011 in.
(B) Balancer-shaft Bearing I.D.
W1065581
30.000 to 30.013 mm
1.1811 to 1.1816 in.
30.05 mm
1.183 in.
W1065759
0.020 to 0.040 mm
0.00079 to 0.0015 in.
0.15 mm
0.0059 in.
30.006 to 30.011 mm
1.1814 to 1.1815 in.
30.031 to 30.046 mm
1.1824 to 1.1829 in.
W1065897
KiSC issued 05, 2012 A