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8-20 ENGINE BOTTOM END
Crankshaft and Connecting Rods
CAUTION
To minimize vibration, the connecting rods should
have the same weight mark.
BigEndCap[A]
Connecting Rod [B]
Weight Mark, Alphabet [C]
Diameter Mark [D]
If the connecting rods, big end bearing inserts, or crank-
shaft are replaced with new ones, select the bearing insert
and check clearance with a plastigage before assembling
engine to be sure the correct bearing inserts are installed.
CAUTION
The connecting rod bolts are designed to stretch
when tightened. Never reuse them. See the table
below for correct bolt and nut usage.
•
Apply grease and oil to the following portions.
Apply molybdenum disulfide grease [A].
Do not apply grease and oil [B].
Apply molybdenum disulfide oil solution [C].
CAUTION
Do not apply grease to the inner surface of the lower
big end cap or to the outer surface of the lower bear-
ing insert.
•
Install the bearing insert as shown to prevent its outer
surface from scratch damage with connecting rod edge.
Connecting Rod Side Bearing Insert [A]
Dowel Pin [B]
Claw Side [C]
Cap Side Bearing Insert [D]
Connecting Rod Cap [E]
•
Replace the connecting rod big end bolts and nuts with
new ones.
•
Be sure to clean the bolts, nuts, and connecting rods
thoroughly with high-flash point solvent, because the new
connecting rods, bolts, and nuts are treated with anti-rust
solution.
CAUTION
Immediately dry the bolts and nuts with com-
pressed air after cleaning.
Clean and dry the bolts and nuts completely.