Loose housing bolts can lead to driveline vibrations that damage the transmission input shaft.
Some ISX use → torque 180 Nm (133 lb-ft) . Check your starter flange. Cummins Isx Flywheel Housing Torque Specs
For a Cummins ISX engine, the flywheel housing mounting bolts are typically torqued in a two-stage process to ensure even clamping and prevent leaks or misalignment. Cummins ISX Flywheel Housing Torque Specifications : 75 ft-lbs (102 Nm). Final Torque : 145 ft-lbs (197 Nm). Loose housing bolts can lead to driveline vibrations