Tighten all main bearing capscrews in sequence (working from the center outward) to [149 N•m]. Main Step 2: Rotate each capscrew an additional 180 degrees Critical Assembly Tips Lubrication:
Some early ISX (CM570/870) used a non-TTY bolt. For those: torque is 84 lb-ft + 30 degrees . Verify your bolt length. cummins isx main and rod bearings torque specs new
Install caps in the correct orientation (numbers must match the block). Tighten all main bearing capscrews in sequence (working
Always verify if your engine utilizes the "New Style" bolts. Using standard torque values on a torque-to-yield bolt will result in under-torquing and certain bearing failure. Conversely, using angle torque on a standard bolt will snap the bolt. Verify your bolt length
Rotate the capscrews in numerical sequence by an additional 60 degrees . Main Bearing Bearing Torque Specs
Tighten in numerical sequence to 30 ft-lb (40 N•m).
| Component | Specification | | --- | --- | | | M16 x 2.0 Property Class 10.9 (Wet torque) | | Lubrication | Clean 15W-40 engine oil (not assembly lube on threads) | | Step 1 Torque | 90 lb-ft (122 N·m) | | Step 2 Torque | 130 lb-ft (176 N·m) | | Step 3 (Final) | Angle-turn +90 degrees |