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CRANKSHAFT/TR ANSMISSION 9-15
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.
WARNING
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.
CAUTION
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 to the
following:
Threads [A] of Nuts and Bolts
Seating S urfaces [B] of Nuts and Con-rods
•
First, tighten the nuts to the specified torque. See the
table below.
•
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.
Connecting
Torque + Angle
Rod Assy Bolt Nut
N·m (kgf·m, ft·lb)
Attached to
18 (1.8, 13.0)
new con-rod
+ 120°
20 (2.0, 14.5)
New
Use the bolts
attached to
new con-rod.
New
+ 120°
24 (2.4, 17.4)
Used
+ 120°
25 (2.6, 18.8)
Used
Replace the
bolts with
new ones
New
+ 120°
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.