Torque Spec For Flywheel Bolts On Isx Cummins 251 Updated

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For the equipped with the 251mm (10 inch) flywheel housing : torque spec for flywheel bolts on isx cummins 251 updated

Log into Quickserve, navigate to Engine > Flywheel and Housing > Mounting . Look for revision date 2022 or later . The old PDFs still show 250 lb-ft; ignore them. Use the interactive torque tool which now defaults to 265 lb-ft. He tapped it

However, an essay on this subject must focus on the and why the original spec failed. Look for revision date 2022 or later

| Engine Model | Flywheel Bolt Size | Updated Torque Spec | |--------------|--------------------|----------------------| | ISX (Pre-2007, 12-bolt) | M14 | 110 lb-ft + 60° | | | M16 x 2.0 | 125 lb-ft + 90° | | X15 (Performance series) | M16 x 1.5 | 150 lb-ft + 75° |

Older literature sometimes listed 250 lb-ft. The updated Cummins FSB (Field Service Bulletin) #140514 revises this to 265 lb-ft + 90° for all ISX engines using the 251 flywheel with original equipment bolts.