Torque Spec For Flywheel Bolts On Isx Cummins 251 Updated -

Unless the new bolts come with pre-applied thread locking compound (usually dry-to-the-touch red or blue patch):

Cummins moved to Torque-To-Yield (TTY) bolts on late-model ISX (CM2350, X15). If your bolt has a reduced shank or a painted dot on the head, it is TTY. torque spec for flywheel bolts on isx cummins 251 updated

Using an impact wrench for the final step is highly discouraged; only a calibrated torque wrench should be used for the final 184 ft-lb pull to prevent bolt snapping or crankshaft thread damage. Cummins ISX15 & X15 Flywheel Torque Specs - JustAnswer Unless the new bolts come with pre-applied thread

| Step | Action | Value | |------|--------|-------| | 1 | Clean threads & crank flange holes (use a tap/chaser) | No debris | | 2 | Apply light oil to bolt threads & flange face | Do not over-saturate | | 3 | Hand-start all 14 bolts | Finger tight | | 4 | | 125 lb-ft | | 5 | Final Pass (Angle Control) | 90 degrees | Cummins ISX15 & X15 Flywheel Torque Specs -

Use clean engine oil (typically 15W-40) on the bolt threads and the underside of the bolt heads before installation. Do not use thread locker (Loctite) unless specifically directed by an updated technical bulletin for your exact Serial Number. Flywheel Housing & Components

Before finalizing your assembly, it is highly recommended to verify your specific using Cummins QuickServe Online or the Cummins INSITE program to confirm if there are any unique updates for your specific 251-series or X15 variant. X15 Cummins Flywheel Bolt Torque Specs - Expert Q&A Guide