MARUTI SUZUKI Zen Estilo 2018, Manual

Page: 186 / 788

ENGINE MECHANICAL 1D-55
Main Bearings Inspection
General information
´ Service main bearings are available in standard size and
0.25 mm (0.0098 in.) undersize, and each of them has 5
kinds of bearings differing in tolerance.
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Upper half of bearing (2) has oil groove (3) as shown in
figure. Install this half with oil groove to cylinder block (1).
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On each main bearing cap, arrow mark and number are
embossed 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.
Visual 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
procedure.
1) Remove bearing caps.
2) Clean bearings and main journals.
3) Place a piece of gaging plastic (1) 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): 47 N.m (4.7 kg-m, 34.0 lb-ft)
NOTE :
Do not rotate crankshaft while gaging plastic is installed.
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