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9-18 CRANKSHAFT/T RANSMISSION
Crankshaft and Connecting Rods
Connecting R od Big End Bearing Insert/Crankpin
Wear
•
Measure t he bearing insert/crankpin [B] clearance with
plastigage [A].
•
Tighten the big end nuts to the specified torque (see Con-
necting Rod Installation).
NOTE
○
Do not move the connecting rod and crankshaft during
clearance measurement.
CAUTION
After measurement, replace the connecting rod
bolts.
Connecting Rod Big End Be aring Insert/Crankpin Clearance
Standard: 0.041 ∼ 0.071 mm (0.0016 ∼ 0.0028 in.)
Service Limit: 0.11 mm (0.0043 in.)
If the clearance is within the standard, no bearing replace-
ment is required.
If the clearance is between 0.072 mm (0.00284 in.) and
the service limit (0.11 mm, 0.0043 in.), replace the bear-
ing inserts [A] with inserts painted blue [B]. Check in-
sert/crankpin clearance with the plastigage. The clear-
ance may exceed the standard slightly, but it must not be
less than the minimum in order to avoid bearing seizure.
If the clearance exceeds the service limit, measure the
diameter of the crankpins.
Crankpin Diameter
Standard: 34.984 ∼ 35.000 mm (1.3773 ∼ 1.3780 in.)
Service Limit: 34.97 mm (1.3768 in.)
If any crankpin has worn past the service limit, replace the
crankshaft with a new one.
If the measured crankpin diameters are not less than the
service limit, but do not coincide with the original diameter
markings on the crankshaft, make new marks on it.
Crankpin Diameter Marks
None 34.984 ∼ 34.992 mm (1.3773 ∼ 1.3776 in.)
34.993 ∼ 35.000 mm (1.3777 ∼ 1.3780 in.)
∆: Crankpin Diameter Marks, " "ornomark.