On older ISX CM570/CM870, the final step may be +60 degrees instead of 90. Check your engine serial number.

The most common mistake when using new torque specs on an ISX is .

The main bearing caps on an ISX are cross-bolted (side bolts plus vertical bolts). This is a four-step process. Failure to follow the sequence will warp the main bore.

Clean the bolt threads and the underside of the bolt head. Apply clean engine oil to the threads and washer face.

cummins isx main and rod bearings torque specs new