For a Cummins ISX engine, the flywheel housing mounting bolts typically require a multi-stage torque process. While specific values can vary slightly by model year and application (such as Peterbilt or International), the standard torque values and sequence are as follows: Flywheel Housing Torque Specifications Tighten bolts to 74 ft-lbs (100 N·m) . Final Step: Tighten bolts to 145 ft-lbs (197 N·m) .
Use a star pattern similar to a wheel lug pattern. Tighten bolt #1, then the bolt opposite it, crisscrossing the flywheel face to ensure the flywheel seats flat against the crank flange. Cummins Isx Flywheel Housing Torque Specs
Heavy-duty engines like the ISX benefit from using guide pins (Part #3163934) to help slide the housing over the dowel rings without damaging the rear seal. The "Ugga-Dugga" Warning: For a Cummins ISX engine, the flywheel housing
(Note: If the housing has bolt holes on the very top flange or bottom pan rail, tighten the main housing bolts first using the sequence above, then tighten the flange bolts to the same specification.) Use a star pattern similar to a wheel lug pattern