Crankshaft and Connecting Rods
Connecting Rod Big End Bearing Insert/Crankpin
Measure the bearing insert/crankpin [B] clearance with
Tighten the big end nuts to the specified torque (see Con-
necting Rod Installation in this chapter).
Do not move the connecting rod and crankshaft during
After measurement, replace the connecting rod
Connecting Rod Big End Bearing Insert/Crankpin Clearance
0.031 ∼ 0.059 mm (0.0012 ∼ 0.0023 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 0.060 mm (0.002 in.) and
the service limit (0.10 mm, 0.004 in.), replace the bear-
ing inserts [A] with inserts painted yellow [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 [C] of the crankpins.
29.984 ∼ 30.000 mm (1.1804 ∼ 1.1811 in.)
Service Limit: 29.97 mm (1.1800 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 [D] on the crankshaft, make new marks on it.
Crankpin Diameter Marks
None: 29.984 ∼ 29.992 mm (1.1804 ∼ 1.1808 in.)
29.993 ∼ 30.000 mm (1.1809 ∼ 1.1811 in.)
: Crankpin Diameter Marks, "
Measure the connecting rod big end inside diameter, and
mark each connecting rod big end in accordance with the
Tighten the connecting rod big end nuts to the specified
torque (see Connecting Rod Installation in this chapter).
The mark already on the big end should almost coincide
with the measurement.
" mark or no mark.