Torque Spec For Flywheel Bolts On Isx Cummins 251 Updated

Jake had meant to write it down. He’d meant to update the wall chart. But then a fuel pump job had walked in, and the number had slipped into the fog of a 70-hour week.

A torque wrench measures friction, not clamp load. By specifying 251 N·m plus 90°, Cummins ensures the bolt is plastically deformed (stretched permanently) to a precise clamp load of approximately 36,000 lbs of force. The 251 N·m gets you past the friction threshold; the 90° turn induces the stretch. torque spec for flywheel bolts on isx cummins 251 updated

Log into Quickserve, navigate to Engine > Flywheel and Housing > Mounting . Look for revision date 2022 or later . The old PDFs still show 250 lb-ft; ignore them. Use the interactive torque tool which now defaults to 265 lb-ft. Jake had meant to write it down