Dodge Ram 4931041 Piston pin for Cummins 6.7L ISB QSB ISDE

The Cummins 4931041 is a genuine OEM piston pin (wrist pin) designed for 6.7L Cummins engines(ISB, QSB, and ISDe variants). Below are the technical details and compatibility notes for Dodge Ram applications:

4931041 Piston Pin Specifications

• Outer Diameter (OD): 32 mm (precision-ground)

• Length: 90 mm (varies slightly by engine variant)

• Material: Case-hardened chromium steel

• Surface Finish: Phosphate-coated for wear resistance

• Weight: ~450 grams (balanced for OEM pistons)

Compatible Engines

✔ Fits:

• 6.7L ISB (Dodge Ram 2500/3500 2007.5–present)

• 6.7L QSB (Industrial/Marine)

• 6.7L ISDe (Global on-highway)

✔ Replaces Obsolete Part:

• 4085384 (older design)

Critical Fitment Notes for Dodge Rams

1. Piston Compatibility:

   • Must pair with 32mm bore pistons (e.g., OEM #4959466 or aftermarket equivalents).

   • Not compatible with 5.9L pins (29mm OD).

2. Installation:

   • Freeze pistons (heat to 250°F) for easier pin insertion.

   • Torque connecting rods: 90 Nm + 90° turn (ISB).

3. Lubrication:

   • Always coat with engine assembly lube before installation.

Cross-Reference Alternatives

Warning

⚠ Do NOT reuse old pins – Cummins mandates replacement with pistons.
⚠ Check pin fit: Should slide smoothly with 0.005–0.015 mm clearance.

Maintenance Tip

• Inspect pin bores for ovality during rebuilds (max tolerance: 0.03 mm).

Need the factory service manual procedure? Ask for the ISB 6.7L engine rebuild specs!