Suzuki WagonR+ RB310 Service Manual page 2533

6A1-58 ENGINE MECHANICAL
Crank Pin and Connecting Rod Bearings
D Inspect crank pin for uneven wear or damage. Measure crank pin
for out-of-round or taper with a micrometer. If crank pin is dam-
aged, or out-of-round or taper is out of limit, replace crankshaft or
regrind crank pin to undersize and use undersize bearing.
Connecting rod bearing size
Standard
0.25 mm (0.0098 in.)
undersize
Out-of-round and taper limit: 0.01 mm (0.0004 in.)
D 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 under-
size bearing has the stamped number (USO25) on its backside
as indicated in figure, but standard size one has no number.
D 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 plasticgauge (1) to full width of crankpin as
contacted by bearing (parallel to crankshaft), avoiding oil hole.
4) Install rod bearing cap (1) to connecting rod.
When installing cap, be sure to point arrow mark (2) on cap to
crankshaft pulley side (3), as shown in figure. After applying
engine 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)
Crank pin diameter
41.982 – 42.000 mm
(1.6528 – 1.6535 in.)
41.732 – 41.750 mm
(1.6430 – 1.6437 in.)