A fleet owner recently towed a 2012 Peterbilt 587 with an ISX CM2250. Symptoms: dripping oil from the flywheel housing weep hole, grinding noise when starting, and clutch chatter.
The flywheel housing on a Cummins ISX must be torqued using the method: 55 N·m then 90° for M12 bolts. Direct torque values alone are insufficient due to friction variations. Following the specified sequence, dowel alignment, and flange sealant application ensures leak-free operation and proper drivetrain alignment for the engine’s service life. Cummins Isx Flywheel Housing Torque Specs
For the most accurate data for your specific engine, you can use the Cummins QuickServe Online portal with your Engine Serial Number (ESN). Rear structure bolt torque spec for 2016 Prostar ISX15? A fleet owner recently towed a 2012 Peterbilt