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6A1-76 ENGINE MECHANICAL (M13 ENGINE)
4) Install rod bearing cap (1) to connecting rod.
When installing cap, be sure to point arrow mark (2) on cap
to crankshaft pulley side, as shown in figure. After applying
engine oil to rod bolts and tighten cap nuts (3) gradually as
follows.
a) Tighten all cap nuts to 15 N·m (1.5 kg-m, 11.0 lb-ft).
b) Retighten them to 45°.
c) Repeat step b) once again.
Tightening torque
Connecting rod bearing cap nuts
(a) : 15 N·m (1.5 kg-m, 11.0 lb-ft), and then retighten by
turning through 45° twice
5) Remove cap and using a scale (1) on gaging plastic (2)
envelope, measure gaging plastic 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 : 0.029 – 0.047 mm (0.0011 – 0.0018 in.)
Limit : 0.065 mm (0.0026 in.)
6) If clearance can not be brought to its limit even by using a
new standard size bearing, regrind crank pin to undersize
and use 0.25 mm undersize bearing.
NOTE:
After checking the rod bearing clearance, make sure that
checking for Connecting rod bolt deformation.
Refer to "Connecting rod" of "Pistons, Piston Rings,
Connecting Rods and Cylinders Inspection".
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.
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