For a Cummins ISX engine rebuild, using new bolts involves a specific "seating" process to ensure the fasteners stretch correctly and provide the proper clamping force Industrial Parts Depot Connecting Rod Bearing Torque Specs
Always lubricate the threads and the underside of the capscrew heads/washers with clean 15W-40 engine oil. Loctite 518 cummins isx main and rod bearings torque specs new
Tighten vertical bolts working outward in a spiral. For a Cummins ISX engine rebuild, using new
The main bearings use a three-step process involving initial torque followed by a rotation (torque-to-yield). 203 N•m [150 ft-lb] Step 2: 407 N•m [300 ft-lb] Step 3: Rotate 90 degrees 203 N•m [150 ft-lb] Step 2: 407 N•m
Retighten in numerical sequence to 70 N•m (52 ± 4 ft-lb) .
For a new ISX bolt, the final torque value is irrelevant. You are not torquing to a number; you are torquing to an angle . If you do not own an angle gauge, do not rebuild an ISX. The difference between 100° and 110° is the difference between a running engine and a connecting rod exiting the side of the block at 2,000 RPM.