Service Manual

CAMSHAFT/CRANKSHAFT 7-13
Crankshaft, Connecti ng Rod
Connecting Rod Bend/Twist
•
Measure connecting rod bend.
Select an arbor of the same diameter as the connecting
rod big end, and insert the arbor through the connecting
rod big end.
Select an arbor of the same diameter as the piston pin
and at least 100 mm long, and insert the arbor through
the connecting rod small end.
On a surface plate, set the big-end arbor on V blocks [A].
With the connecting rod held vertically, use a height
gauge to measure the difference in the height of the
small end arbor above the surface plate over a 100 mm
length to determine the am ount of connecting rod bend
by dial gauge [B].
If connecting rod bend exceeds the service limit, the con-
necting rod must be replaced.
Connecting Rod Bend
Service Limit: 0.2/100 mm (0.008/3.94 in.)
•
Measure connecting rod twist.
With the big-end arbor still on the V blocks [A], hold the
connecting rod horizontally and measure the amount that
the small end arbor varies from being parallel with the sur-
face plate over a 100 mm length of the arbor to determine
the amount of connecting rod twist by dial gauge [B].
If connecting rod twist exceeds the service limit, the con-
necting rod must be replaced.
Connecting Rod Twist
Service Limit: 0.2/100 mm (0.008/3.94 in.)
Connecting Rod Big End/Crankpin Width Wear
•
Measure the connecting rod big end width [A] with a mi-
crometer or dial caliper.
If the measurement is less than the service limit, replace
the connecting rod.
Connecting Rod Big End Width
Service Limit: 23.44 mm (0.92 in.)