Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

Page: 477 / 834

6A2-102 ENGINE MECHANICAL (H25 ENGINE)
5) Remove crankcase and using scale (2) on gaging plastic (1)
envelop, measure gaging 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 0.25 mm undersize bearing.
After selecting new bearing, recheck clearance.
Bearing Clearance
Standard : 0.024 – 0.044 mm (0.0010 – 0.0017 in.)
Limit : 0.060 mm (0.0023 in.)
Selection of main bearings
STANDARD BEARING :
1) First check journal diameter. As shown in figure, crank web
(2) has stamped numbers and alphabet at the center.
Three kinds of numbers (“1”, “2” and “3”) represent the fol-
lowing journal diameters.
Crankshaft journal specification
NOTE:
• If bearing is in malcondition, or bearing clearance is
out of specification, select a new standard bearing
according to following procedure and install it.
• When replacing crankshaft or cylinder block and crank
case due to any reason, select new standard bearings
to be installed by referring to number stamped on new
crankshaft and/or alphabets stamped on new crank-
case lower side.
Stamped numbers Journal diameter
1
65.0000 – 65.0060 mm
(2.5591 – 2.5592 in.)
2
64.9940 – 64.9999 mm
(2.5589 – 2.5590 in.)
3
64.9880 – 64.9939 mm
(2.5586 – 2.5588 in.)
1. Crankshaft