1-4 Engine mechanical (connecting rod and crank shaft) Structure Connecting rod The connecting rod is made of forged carbon steel. Its large end is horizontally split, which has advantages in rigidity. The bush made of lead bronze with the oil groove in the center is pressed in its small end. The connecting rod bolts are tightened by the plastic region tightening method.
Fitting direction of the bush joint Match the bush oil hole with the con rod oil hole Oil hole 6 Matching marks Connecting rod (Looking at from the front of the engine) As shown in the illustration, the plastic region tightening method is the way of tightening the bolts in the plastic region where the change in the axial tension against the extension of the bolt is few. This method has following characteristics. Stable axial tension can be obtained: Because fluctuation in the axial tension is small comparing to elastic region tightening, the axial tension can be stabilized. High axial tension can be obtained. There is a limit in reuse:
Because plastic elongation is added at every time of it is reused, the frequency of reuse is limited. Refer to the J08E engine repair manual ( ) when reusing.