Service Manual

7-12 CAMSHAFT/CRANKSHAFT
Crankshaft, Connecting Rod
•
Measure connection rod twist.

With the big-end arbor still on the V blocks, hold the connection rod
horizontally and measure the amount that the small end arbor varies
from being parallel with the surface plate over a 100 mm length of
the arbor to determine the amount of connecting rod twist.
If connection rod twist exceeds the service limit, the connecting rod
must be replaced.
Connecting Rod Twist
Service Limit: 0.15/100 mm (0.006/3.94 in.)
Connecting Rod Big End/Crankpin Width Wear
•
Measure the connecting rod big end width [A] with a micrometer or
dial caliper.
If the measurement is less than the service limit, replace the
connecting rod.
Connecting Rod Big End Width
Service Limit: 18.80 mm (0.74 in.)
•
Measure the crankpin width [A] with a dial caliper.
If the crankpin width is more than the service limit, replace the
crankshaft.
Crankpin Width
Service Limit: 39.50 mm (1.56 in)
Connecting Rod Big End Bearing/Crankpin Wear
•
Apply a light film of oil on the thread of the cap bolts.
•
Install the cap bolts and tighten the bolts to the specified torque (see
Piston Installation in Engine Top End chapter).
•
Measure the inside diameter [A] of big end at several points with a
telescoping gauge or inside micrometer.
If the inside diameter is more than the service limit, replace the
connecting rod with a new one.
Connecting Rod Big End Inside Diameter
Service Limit: 33.055 mm (1.301 in.)
•
Measure the crankpin outside diameter [A].

Use a micrometer to measure several points around the crankpin
circumference.
If the crankpin diameter is less than the service limit, replace the
crankshaft with a new one.
Crankpin Outside Diameter
Service Limit: 32.94 mm (1.297 in.)