Crankshaft and Connecting Rods
If the connecting rods, big end bearing inserts, or
crankshaft are replaced with new ones, select the
bearing insert and check clearance with a plasti-
gage (press gauge) before assembling engine to be
sure the correct bearing inserts are installed.
The connecting rod bolts are designed to stretch
when tightened. Never reuse them.
Replace the connecting rod big end bolts and nuts with
Apply molybdenum disulfide oil to the inner surface of up-
per and lower bearing inserts [A].
Apply molybdenum disulfide oil to the threads [B] and
seating surface [C] of the connecting rod nuts.
Install the inserts so that their nails [D] are on the same
side and fit them into the recess of the connecting rod and
Wrong application of oil and grease could cause
When installing the inserts [A], be careful not to damage
the insert surface with the edge of the connecting rod [B]
or the cap [C]. One way to install inserts is as follows.
Installation [D] to Cap
Installation [E] to Connecting Rod
Spare Dowel Pin [G]
Connecting Rod Bolts [H]
The connecting rod big end is bolted using the "plastic
region fastening method".
This method precisely achieves the needed clamping
force without exceeding it unnecessarily, allowing the
use of thinner, lighter bolts further decreasing connecting
There are two types of the plastic region fastening. One
is a bolt length measurement method and other is a tight-
ening torque method. Observe one of the following two,
but the bolt length measurement method is preferable be-
cause this is a more reliable way to tighten the big end
CRANKSHAFT / TRANSMISSION 9-13