Filter
Top Products
9-20 CRANKSHAFT/TRANSMISSION
Crankshaft and Connecting Rods
•
Install new bolts in reused connecting rods.
•
Apply a small amount of molybdenum disulfide oil solution
to the following.
Threads [A] of Nuts and Bolts
Seating Surfaces [B] of Nuts and Connecting Rods
•
First, tighten the nuts to the specified torque. See the
table below.
•
Next, tighten the nuts 150°.
○
Mark [A] the connecting rod big end caps and nuts so that
nuts can be turned 150° [B] properly.
Connecting
Rod Assy
Bolt Nut
Torque + Angle
N·m (kgf·m, ft·lb)
Attached to
new con-rod
20 (2.0, 15) + 150°
New
Use the bolts
attached to
new con-rod.
New 20 (2.0, 15) + 150°
Used 20 (2 .0, 15) + 150°
Used
Replace the
bolts with
new ones
New
20 (2.0, 15) + 150°
Crankshaft/Connecting Rod Cleaning
•
After removing the connecting rods from the crankshaft,
clean them with a high-flash point solvent.
•
Blow the crankshaft oil passages with compressed air to
remove any foreign particles or residue that may have
accumulated in the passages.
Connecting Rod Bend
•
Remove the connecting rod big end bearing inserts, and
reinstall the connecting rod big end cap.
•
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
[B] through the connecting rod small end.
•
On a surface plate, set the big-end arbor on V block [C].
•
With the connecting rod held vertically, use a height
gauge to measure the difference in the height of the
arbor above the surface plate over a 100 mm (3.94 in.)
length to determine the amount of connecting rod bend.
If connecting rod bend exceeds the service limit, the con-
necting rod must be replaced.
Connecting Rod Bend
Service Limit: TIR 0.2/100 m m (0.008/3.94 in.)
www.zxforums.com
www.zxforums.com
www.zxforums.com
www.zxforums.com
www.zxforums.com
www.zxforums.com
www.zxforums.com