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What is the torque specification for the Changchai 1125 connecting rod bolts?

1 Answers

MaggieAnn

08/28/25 3:37am

Changchai 1125 connecting rod bolt torque is 30Nm. Introduction to Connecting Rod: Connects the piston to the crankshaft, transmitting the forces acting on the piston to the crankshaft and converting the reciprocating motion of the piston into the rotational motion of the crankshaft. The connecting rod assembly consists of the connecting rod body, connecting rod big end cap, connecting rod small end bushing, connecting rod big end bearing, and connecting rod bolts (or screws). Function of Connecting Rod: The connecting rod assembly bears the gas forces transmitted from the piston pin, as well as its own swinging motion and the reciprocating inertial forces of the piston assembly. These forces vary cyclically in magnitude and direction. Therefore, the connecting rod is subjected to alternating loads such as compression and tension. The connecting rod must have sufficient fatigue strength and structural rigidity. Insufficient fatigue strength often leads to fractures in the connecting rod body or connecting rod bolts, resulting in serious accidents involving complete engine failure. Insufficient rigidity can cause bending deformation of the rod body and oval deformation of the connecting rod big end, leading to uneven wear of the piston, cylinder, bearings, and crank pin.

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