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CRANKSHAFT/TRANSMISSION 9-21
Crankshaft and Connecting Rods
Connecting Rod Big End Bearing Insert/Crankpin
Wear Inspection
•
Remove the connecting rod big end (see Connecting Rod
Removal).
•
Cut strips of plastigage (press gauge) to crankpin width.
Place a strip on the crankpin parallel to the crankshaft
installed in the correct position.
•
Tighten the connecting rod big end nuts to the specified
torque (see Connecting Rod Installation).
NOTE
○
Do not move the connecting rod and crankshaft during
clearance measurement.
•
Remove the connecting rod big end again, measure each
clearance between the bearing insert and crankpin [A] us-
ing plastigage (press gauge) [B].
NOTICE
After measurement, replace the connecting rod
bolts.
Connecting Rod Big End Bearing Insert/Crankpin Clearance
Standard: 0.030
∼ 0.060 mm (0.0012 ∼ 0.0024 in.)
Service Limit: 0.10 mm (0.0039 in.)
If the clearance is within the standard, no bearing replace-
ment is required.
If the clearance is between 0.061 mm (0.0024 in.) and
the service limit (0.10 mm, 0.0039 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: 34.484
∼ 34.500 mm (1.3576 ∼ 1.3583 in.)
Service Limit: 34.47 mm (1.357 in.)
If any crankpin has worn past the service limit, replace the
crankshaft with a new one.
If the measured crankpin diameters [A] are not less than
the service limit, but do not coincide with the original di-
ameter markings [B] on the crankshaft, make new marks
on it.
Crankpin Diameter Marks
None
34.484
∼ 34.492 mm (1.3576 ∼ 1.3579 in.)
34.493
∼ 34.500 mm (1.3580 ∼ 1.3583 in.)
: Crankpin Diameter Marks, “
”ornomark.
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