Crankshaft and Connecting Rods
(2) Rotation Angle Method
If you don't have a point micrometer, you may tighten the
nuts using the "Rotation Angle Method".
Be sure to clean the bolts and nuts thoroughly with a high
-flash point solvent, because the new bolts and nuts are
treated with an anti-rust solution.
Clean the bolts and nuts in a well-ventilated area,
and take care that there is no spark or flame any-
where near the working area. This includes any ap-
pliance with a pilot light. Because of the danger
or highly flammable liquids, do not use gasoline or
low-flash point solvents to clean them.
Immediately dry the bolts and nuts with com-
pressed air after cleaning.
Clean and dry the bolts and nuts completely.
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
Next, tighten the nuts 120° ±5° .
Mark [A] the connecting rod big end caps and nuts so that
nuts can be turned 120° [B] properly.
Tighten the hexagon nut by 2 corners.
Use the bolts
bolts with new
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.
Torque + Angle
N·m (kgf·m, ft·lb)
18 (1.8, 13)
new con-rod + 120°
20 (2.0, 15)
24 (2.4, 18)
25 (2.5, 18)