Suzuki GA413, Service Manual

Page: 886 / 1246

5) Remove cap and using scale on gaging plastic envelope, mea-
sure gaging plastic width at its widest point. If clearance ex-
ceeds 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 0.25
mm undersize bearing.
After selecting new bearing, recheck clearance.
1. Gaging plastic
2. Scale
Selection of main bearings
STANDARD BEARING:
If bearing is in malcondition, or bearing clearance is out of specifi-
cation, select a new standard bearing according to following proce-
dure and install it.
1) First check journal diameter by using following procedure.
As shown in figure, crank webs of No.2 and No.3 cylinders have
five stamped numerals.
Three kinds of numerals (“1”, “2” and “3”) represent following
journal diameters.
The first, second, third, fourth and fifth (left to right) stamped nu-
merals represent journal diameters at bearing caps “1”, “2”, “3”,
“4” and “5” respectively.
For example, in figure, the first (leftmost) numeral “3” indicates
that journal dia. at bearing cap “1” is within 44.982 – 44.988 mm,
and second one “1” indicate that journal dia. at cap “2” is within
44.994 – 45.000 mm.
1. Crank webs of No.2 and No.3 cylinders
6A-8 ENGINE MECHANICAL
GA413
supple
Standard Limit
Bearing clearance
0.013 – 0.033 mm
(0.0005 – 0.0013 in.)
0.060 mm
(0.0023 in.)
Numeral stamped Journal diameter
1
44.994 – 45.000 mm
(1.7714 – 1.7716 in.)
2
44.988 – 44.994 mm
(1.7712 – 1.7714 in.)
3
44.982 – 44.988 mm
(1.7709 – 1.7712 in.)