The ISX engine uses a "string-style" gasket, which is notorious for developing oil leaks on high-mileage or high-torque engines. A dry installation will almost certainly result in a leak.
The sequence is generally a "Star" or "Cross" pattern starting from the center and moving outward. Cummins Isx Flywheel Housing Torque Specs
The Cummins ISX engine family uses different bolt sizes and housing materials (cast iron or aluminum) depending on the production year. Always verify your bolt size before final tightening. Core Torque Values Fastener Type / Location Torque Value (Foot-Pounds) Torque Value (Newton-Meters) 150 ft-lbs Main Housing Bolts (Small) Housing-to-Block (Alternate) Inspection Cover Bolts The ISX engine uses a "string-style" gasket, which
These are single-use torque-to-yield (TTY) bolts on most ISX models. Replace with new bolts. If reusing (not recommended), torque to 190 Nm (140 lb-ft) only. The Cummins ISX engine family uses different bolt
Lubricate the threads and underneath the bolt heads with clean 15W-40 engine oil before installation. Alignment: Use a dial indicator to check for bore and face runout allows a maximum runout of approximately 0.005 to 0.008 inches depending on the bore diameter. Guide Studs: It is highly recommended to use two guide studs
For standard Cummins ISX/QSX15 engines, the final torque values are: 105 N·m [77 ft-lb] M10 Bolts: 49 N·m [36 ft-lb] 2. The Torque Sequence