Suzuki 2000 Grand Vitara SQ416, Service Manual

Page: 495 / 729

YH4
GRAND
VITARA
6A4-76 ENGINE MECHANICAL (J20 ENGINE)
1. Gaging plastic
2. Scale
1. Crankshaft pulley side
2. Flywheel side
3. Crankshaft web No.2
5) Remove lower crankcase and using scale on gaging plastic en-
velop, measure gaging plastic width at its widest point. If clear-
ance exceeds its limit, replace bearing. Always replace both up-
per 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.
Bearing Clearance
Standard: 0.032 – 0.052 mm (0.0013 – 0.0020 in.)
Limit:
0.060 mm (0.0023 in.)
Selection of main bearings
STANDARD BEARING:
If bearing is in malcondition, or bearing clearance is out of specifica-
tion, select a new standard bearing according to following proce-
dure and install it.
1) First check journal diameter. As shown in figure, crank web No.2
has stamped numbers.
Three kinds of numbers (“1”, “2” and “3”) represent following
journal diameters.
Stamped numbers Journal diameter
1
57.994 – 58.000 mm
(2.2832 – 2.2834 in.)
2
57.988 – 57.994 mm
(2.2830 – 2.2832 in.)
3
57.982 – 57.988 mm
(2.2828 – 2.2829 in.)
Stamped numbers on crank web No.2 represent journal diame-
ters marked with an arrow in figure respectively.
For example, stamped number “1” indicates that corresponding
journal diameter is 57.994 – 58.000 mm.