Crankshaft and Connecting Rods
Measure the crankshaft runout.
If the measurement exceeds the service limit, replace the
Crankshaft Main Bearing Insert/Journal Wear
Using a plastigage (press gauge) [A], measure the bear-
ing insert/journal [B] clearance.
Tighten the crankcase bolts to the specified torque (see
Do not turn the crankshaft during clearance measure-
Journal clearance less than 0.025 mm (0.001 in.) can
not be measured by plastigage, however, using genuine
parts maintains the minimum standard clearance.
Crankshaft Main Bearing Insert/Journal 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 0.059 mm (0.0023 in.) and the
service limit 0.09 mm (0.0035 in.), replace the bearing in-
serts with inserts [A] painted blue [B]. Check insert/journal
clearance with the plastigage. The clearance may exceed
the standard slightly, but it must not be less than the min-
imum in order to avoid bearing seizure.
If the clearance exceeds the service limit, measure the
diameter of the crankshaft main journal.
Crankshaft Main Journal Diameter
29.984 ∼ 30.000 mm (1.1805 ∼ 1.1811
29.96 mm (1.18 in.)
If any journal has worn past the service limit, replace the
crankshaft with a new one.
If the measured journal 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.
Crankshaft Main Journal Diameter Marks
29.984 ∼ 29.994 mm (1.1805 ∼ 1.1809 in.)
29.995 ∼ 30.000 mm (1.1809 ∼ 1.1811 in.)
□: Crankshaft Main Journal Diameter Marks, "1" mark or
TIR 0.02 mm (0.0008 in.) or less
TIR 0.05 mmm (0.002 in.)
CRANKSHAFT / TRANSMISSION 9-19