Suzuki WagonR+ RB310 Service Manual page 2546

Main Bearings
General information
D Service main bearings are available in standardsize and 0.25 mm
(0.0098 in.) undersize, and each of them has 5 kinds of bearings
differing in tolerance.
D Upper half of bearing (2) has oil groove (3) as shown in figure.
Install this half with oil groove to cylinder block (1).
D On each main bearing cap, arrow mark and number are em-
bossed as shown in figure.
When installing each bearing cap to cylinder block, point arrow
mark toward crankshaft pulley side and install each cap from that
side to flywheel side in ascending order of numbers "1", "2", "3",
"4" and "5". Tighten cap bolts to specified torque.
Inspection
Check bearings for pitting, scratches, wear or damage.
If any malcondition is found, replace both upper and lower halves.
Never replace one half without replacing the other half.
Main bearing clearance
Check clearance by using plasticgauge (1) according to following
procedure.
1) Remove bearing caps.
2) Clean bearings and main journals.
3) Place a piece of plasticgauge to full width of bearing (parallel to
crankshaft) on journal, avoiding oil hole.
4) Install bearing cap as previously outlined and evenly torque cap
bolts to specified torque.
Bearing cap MUST be torqued to specification in order to assure
proper reading of clearance.
Tightening Torque
.
(a): 54 N m (5.4 kg-m, 39.0 lb-ft)
NOTE:
Do not rotate crankshaft while plasticgauge is installed.
ENGINE MECHANICAL 6A1-71