What is the installation direction of the engine connecting rod?

[Christopher]

Engine connecting rods have forward-facing marks for installation direction. Here are the specific details: 1. Connecting rod overview: The connecting rod assembly bears the gas force transmitted by the piston pin, as well as the inertial forces from its own swinging motion and the reciprocating motion of the piston assembly. These forces vary periodically 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 bolts, potentially causing severe engine failure. Insufficient rigidity can result in bending deformation of the rod body and oval deformation of the big end, leading to uneven wear on the piston, cylinder, bearings, and crank pin. 2. Composition: The connecting rod body consists of three parts: the small end, which connects to the piston pin; the big end, which connects to the crankshaft; and the rod shank, which connects the small end to the big end.