Torque Spec For Flywheel Bolts On Isx Cummins 251 Updated Free Jun 2026

You will need a deep socket to reach the bolts. The official service manual calls for a special "flywheel capscrew socket, Part Number 2892191". For most professional diesel mechanics, a high-quality 21mm 12-point impact socket is the standard tool for this job, as the bolts are commonly a 12-point design.

Below is a scannable breakdown of the updated factory torque standards for the rear gear train and flywheel assembly components on Cummins heavy-duty platforms: torque spec for flywheel bolts on isx cummins 251 updated

The updated factory torque specification for the flywheel bolts on a Cummins ISX (including ISX15 and X15 platforms) is , applied in a two-stage sequence using clean 15W-40 engine oil as a lubricant. You will need a deep socket to reach the bolts

: 40–50 ft-lb (depending on bolt size) . ISX Cummins Flywheel Torque Specs for 2008 Kenworth Below is a scannable breakdown of the updated

For 2021 and later ISX Cummins 251 engine models, the recommended torque spec for flywheel bolts has been updated to , with a ± 5 ft-lbs (6.8 Nm) tolerance. This updated specification is designed to provide a more secure connection between the flywheel and crankshaft, ensuring optimal engine performance and reliability.