Rod bearings connect the pistons to the crankshaft. The ISX utilizes a "fractured cap" design on the connecting rods. The cap is cracked off the rod during manufacturing, creating a unique, interlocking fit.
Some procedures recommend an initial "seat" for caps with thrust bearings by tightening to 150 ft-lb [203 N·m] cummins isx main and rod bearings torque specs new