Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 559

6A4-70 ENGINE MECHANICAL (J20 ENGINE)
5) Remove cap and using a scale (2) on gaging plastic (1)
envelope, measure gaging plastic (1) width at the widest
point (clearance).
If clearance exceed its limit, use a new standard size bearing
referring to "Selection of Connecting Rod Bearings" in this
section.
After selecting new bearing, recheck clearance.
Connecting rod bearing clearance :
Standard : 0.045 – 0.063 mm (0.0018 – 0.0024 in.)
Limit : 0.08 mm (0.0031 in.)
6) If clearance can not be brought to within its limit even by
using a new standard size bearing, replace crankshaft or
regrind crank pin to undersize as follows.
• Install 0.25 mm undersize bearing to connecting rod big-end.
• Measure bore diameter of connecting rod big-end.
• Regrind crank pin to following finished diameter
Measured big-end bore
Finished
= dia. (including under-size
crank pin dia.
bearing)
• Confirm that bearing clearance is within above standard
value.
• Selection of connecting rod bearings:
NOTE:
• If bearing is in malcondition, or bearing clearance is
out of specification, select a new standard bearing
according to the following procedure and install it.
• When replacing crankshaft or connecting rod and its
bearing due to any reason, select new standard bear-
ings to be installed by referring to numbers stamped
on connecting rod and its cap and/or alphabets
stamped on crank web of No.3 cylinder.
0.054 mm
-
(0.0021 in.)