Suzuki GA413, Service Manual

Page: 359 / 1246

Crank Pin and Connecting Rod Bearings
Inspect crank pin for uneven wear or damage. Measure crank
pin for out-of-round or taper with a micrometer. If crank pin is
damaged, or out-of-round or taper is out of limit, replace crank-
shaft or regrind crank pin referring to following step 6).
Out-of-round and taper limit: 0.01 mm (0.0004 in.)
Rod bearing:
Inspect bearing shells for signs of fusion, pitting, burn or flaking
and observe contact pattern. Bearing shells found in defective
condition must be replaced.
Two kinds of rod bearing are available; standard size bearing
and 0.25 mm undersize bearing. To distinguish them, 0. 25 mm
undersize bearing has the stamped number (US025) on its
backside as indicated in figure, but standard size one has no
number.
Rod bearing clearance:
1) Before checking bearing clearance, clean bearing and crank
pin.
2) Install bearing in connecting rod and bearing cap.
3) Place a piece of gaging plastic to full width of crankpin as con-
tacted by bearing (parallel to crankshaft), avoiding oil hole.
1. Gaging plastic
4) Install rod bearing cap to connecting rod.
When installing cap, be sure to point arrow mark on cap to
crankshaft pulley side, as shown in figure. After applying en-
gine oil to rod bolts, tighten cap nuts to specified torque. DO
NOT turn crankshaft with gaging plastic installed.
Tightening Torque
(a): 35 N
.
m (3.5 kg-m, 25.5 lb-ft)
1. Rod bearing cap
2. Arrow mark
3. Crankshaft pulley side
ENGINE MECHANICAL 6A-53
Connecting rod bearing size Crank pin diameter
Standard
41.982 – 42.000 mm
(1.6528 – 1.6535 in.)
0.25 mm (0.0098 in.) undersize
41.732 – 41.750 mm
(1.6430 – 1.6437 in.)