Service Manual

7-18 CAMSHAFT/CRANKSHAFT
Crankshaft, Connecting Rod
Connecting Rod Bend/Twist
•
Measure the connecting rod bend.
○
Select an arbor [A] of the same diameter as the connect-
ing rod big end, and insert the arbor through the connect-
ing rod big end.
○
Select an arbor of the same diameter as the piston pin
and at least 100 mm (3.94 in.) long, and insert the arbor
through the connecting rod small end.
○
On a surface plate, set the big-end arbor on V blocks.
○
With the connecting rod held vertically, use a height
gauge to measure the height difference of the small end
arbor on the surface plate. Using a dial gauge, measure
the height at two different positions and the distance of
the two positions is 100 mm (3.94 in.) [B]. Then deter-
mine the connecting rod bent from the measured height
differences [C].
If connecting rod bend exceeds the service limit, replace
the connecting rod with a new one.
Connecting Rod Bend
Service Limit: TIR 0.15/100 mm (0.006/3.94 in.)
•
Measure the connecting rod twist.
○
With the big-end arbor still on the V blocks, hold the con-
nection rod horizontally and measure the amount that the
small end arbor difference. Using a dial gauge, measure
the height at tow different positions and the distance of
the two positions is 100 mm (3.94 in.) [A]. Then deter-
mine the connecting rod twist from the measured height
differences [B].
If connection rod twist exceeds the service limit, replace
the connecting rod with a new one.
Connecting Rod Twist
Service Limit: TIR 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 mi-
crometer or a dial caliper.
If the measurement is less than the service limit, replace
the connecting rod with a new one.
Connecting Rod Big End Width
Service Limit: 22.05 mm (0.868 in.)