Cummins Isx Main And Rod Bearings Torque Specs New -

Disclaimer: Always consult the specific service manual for your engine serial number (ESN). The following data is based on industry-standard rebuild practices for 2007–2018 ISX engines using new, lubricated fasteners.

Part 4: The "Plastigage" Mandate (Clearance Verification)

Torque specs alone do not guarantee a successful rebuild. You must verify oil clearance using Plastigage or a bore gauge. cummins isx main and rod bearings torque specs new

The main bearing procedure typically involves a seating step regardless of bolt age, though the final angle is the most critical part of the spec. Step 1: Tighten both capscrews to 110 ft-lb (149 N•m). Step 2: Loosen the capscrews completely. Step 3: Retighten to 110 ft-lb (149 N•m). Step 4: Rotate the capscrews an additional 180 degrees. Disclaimer: Always consult the specific service manual for

rod bolts involves an initial "stretch" or seating step that is not required for used bolts. Industrial Parts Depot Tighten capscrews in numerical sequence (1-2-3-4) to [40 N•m]. all capscrews completely in numerical sequence. Retighten in numerical sequence to [70 N•m]. Verify that all capscrews are still at [70 N•m]. Rotate all capscrews an additional 60 degrees in numerical sequence. Main Bearings Main Bearing Cap Bolts: 100-120 ft-lbs (135-163 Nm)

| Component | Step | Specification | Notes | | :--- | :--- | :--- | :--- | | Vertical Main Bolts | 1 | 95 lb-ft | Oil threads | | Vertical Main Bolts | 2 | +90° | Use angle gauge | | Horizontal Bolts | 1 | 40 lb-ft | Cross-bolts | | Horizontal Bolts | 2 | +60° | Critical step |