This report is for informational purposes. Always verify specifications with Cummins Inc. for your specific engine serial number. Improper torque can cause severe engine damage or personal injury. End of Report
Front (Fan end) 13 14 15 16 17 18 12 11 10 09 08 07 19 01 02 03 04 05 06 20 21 22 23 24 25 26 Rear (Flywheel end) Start at center (bolts 1 & 2 near #1 cylinder), work outward in a spiral/crisscross pattern, alternating sides. cummins isx head bolt torque
ISX uses one of the highest total angle rotations (270° after initial torque), indicating significant bolt stretch and high clamp load. The Cummins ISX cylinder head bolt torque procedure is a precise, multi-stage angle torque process requiring new TTY bolts, clean threads, correct lubricant, and strict adherence to sequence. Failure to follow the exact procedure – especially reusing bolts or skipping the final 90° pass – will result in rapid head gasket failure, often within months. This report is for informational purposes