Suzuki Wagon R Manual page 3900

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ENGINE MECHANICAL (Z10XEP AND Z12XEP ENGINES) 6A4-73
Main bearings
General information
Service main bearings are available in standard size, 0.25 mm
(0.0098 in.) undersize and 0.50 mm (0.0197 in.) undersize, and
each of them has 2 kinds of bearings differing in tolerance.
Visual inspection
Check bearings for pitting, scratches, wear or damage.
If any malcondition is found, replace both upper and lower halves.
Never replace either half without replacing the other half.
Main bearing clearance
CAUTION:
Do not rotate crankshaft while gaging plastic is installed.
Check clearance by using gaging plastic according to the follow-
ing procedure.
1) Remove bearing caps.
2) Clean bearings and main journals.
3) Place a piece of gaging plastic (1) to full width of crankshaft
journal as contacted by bearing (parallel to crankshaft),
avoiding oil hole.
4) Install lower crankcase referring to "Main Bearings, Crank-
shaft and Cylinder Block Removal and Installation" in this
section.
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5) Remove bearing caps and using scale (1) on gauging plastic
(2) envelop, measure gauging plastic width at its widest
point. If clearance exceeds its limit, replace bearing. Always
replace both upper and lower inserts as a unit.
A new standard bearing may produce proper clearance. If
not, it will be necessary to regrind crankshaft journal for use
of undersize bearing.
After selecting new bearing, recheck clearance.
Main bearing clearance:
0.005 – 0.018 mm (0.00020 – 0.00071 in.)