Suzuki 2000 Grand Vitara SQ416, Service Manual

Page: 314 / 729

YH4
GRAND
VITARA
1. Cylinder block
2. Upper half of
bearing
3. Oil groove
1. Gaging plastic
6A1-72 ENGINE MECHANICAL (G16 ENGINE)
Main Bearings
General information
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.
Upper half of bearing has oil groove as shown in figure. Install this
half with oil groove to cylinder block.
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 gaging plastic according to following pro-
cedure.
1) Remove bearing caps.
2) Clean bearings and main journals.
3) Place a piece of gaging plastic to full width of bearing (parallel
to crankshaft) on journal, avoiding oil hole.
4) Install bearing cap as previously outlined and evenly toque 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 gaging plastic is installed.