Suzuki Engine 2002 GRAND VITARA SQ625, Руководство по обслуживанию

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ENGINE MECHANICAL (H25 ENGINE) 6A2-85
4) Install rod bearing cap to connecting rod.
When installing cap, be sure to point arrow mark on cap to
crankshaft pulley side, as shown in the figure. After applying
engine oil to rod bolts, tighten cap nuts to specified torque.
Tightening torque
Connecting rod bearing cap nut
(a) : 45 N·m (4.5 kg-m, 32.5 lb-ft)
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.
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, regrind crankpin to
undersize and use 0.25 mm undersize bearing 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 :
• Confirm that bearing clearance is within above standard
value.
• Selection of connecting rod bearings:
NOTE:
DO NOT turn crankshaft with gaging plastic installed.
Finished crank
pin dia.
=
Measured big end bore
dia. (including under-size
bearing)
–
0.054 mm
(0.0021 in.)
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 No.3.