Cummins Isx Main And Rod Bearings Torque Specs New Jun 2026

Note: For main bearings, the 70 N•m step involves a preliminary tighten, followed by a full loosening, before the final 60-degree turn. 5. Critical Installation Tips

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This resets the friction coefficients. By loosening and retorquing, you ensure the micro-surface asperities are flattened, allowing the 105° angle to provide precise plastic deformation (yield) of the bolt. cummins isx main and rod bearings torque specs new

To verify that your oil clearances are within specification before final assembly:

Before installing new bearings, ensure the main bearing saddles are not distorted. Note: For main bearings, the 70 N•m step

Are you working on a single-overhead-cam () or dual-overhead-cam ( DOC ) engine block?

in the specified numerical sequence, typically starting from the center and working outward. Rotate each capscrew an additional 180 degrees Special Note for Thrust Bearing (#4 Cap): By loosening and retorquing, you ensure the micro-surface

After torquing the rod cap, verify side clearance using a feeler gauge to ensure the rod moves freely on the crankshaft journal.

Here is a quick-reference table for the most common fastener torque values on the ISX.

New rod bolts are designed to stretch permanently during installation (torque-to-yield). The specific steps and angle turn are calibrated to achieve the correct clamping force without breaking the bolt.

Re-tighten all main cap bolts to 150 N·m [111 lb-ft] .