Cummins Isx Flywheel Housing Torque Specs Review

Always consult the online portal or your engine’s Service Manual (Bulletin 3666232, 4021931, etc.) for your exact engine serial number. Torque specs occasionally change due to bolt coating (E-coat vs. zinc vs. plain). When in doubt, use 54 Nm (40 lb-ft) for M10 housing bolts unless a later bulletin says 75 Nm.

Torque specifications vary slightly between ISX engine families (Signature 600, ISX CM870, CM871, CM2250, CM2350, X15). Always verify using the official Cummins Service Manual for your specific Engine Serial Number (ESN). This guide is for informational purposes based on common industry data as of 2025. Cummins Isx Flywheel Housing Torque Specs