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This varies significantly. Use the chart below based on your engine family.
Connecting rod bolts are subjected to intense reciprocating stress. Most modern ISX engines use "fractured-cap" rods or high-strength bolts that require a specific three-step sequence. 70 N·m [52 lb-ft] 145 N·m [107 lb-ft] Rotate the bolt 60 degrees (1/6 turn) clockwise. Critical Note: Many ISX rod bolts are "Torque-to-Yield" (TTY)
Using the wrong torque procedure or skipping the critical "angle turn" step on torque-to-yield fasteners is extremely common and inevitably leads to engine failure. Always use a torque wrench for the initial torque pass and a protractor or angle gauge for the angle turn. cummins isx main and rod bearings torque specs new
Ensure the connecting rod and cap mating surfaces (parting line) are perfectly clean and not damaged or "fretted." 4. Why Torque-Angle Matters
Proper lubrication is critical. Use clean engine oil on the bolt threads and, for the main bearings themselves, use a high-quality assembly lube like Lubriplate 105 on the bearing surfaces during installation. This varies significantly
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.
Tighten the rod bolts alternatingly to 135 N·m [100 lb-ft] . Step 3: Loosen the bolts completely. Most modern ISX engines use "fractured-cap" rods or
On ISX engines, the thrust bearings are typically located on the #4 main bearing cap .