Interstate-McBee M-3920781 Cylinder Head Bolt – Rocker Arm (89–98 5.9L Cummins)

OE-style rocker arm (rocker lever) mounting bolt for 1989–1998 Dodge Ram 2500/3500 5.9L Cummins 12-valve engines. Interstate-McBee’s M-3920781 delivers the correct geometry and clamping force to secure the rocker lever to the cylinder head for consistent valve operation and long service life.

• Direct-fit replacement: Matches Cummins 3920781 specifications for form, fit, and function.
• High-strength steel: Built for heavy-duty valvetrain loads and repeatable torque retention.
• OE-style hardware: Correct flange head design for stable rocker alignment under load.
• Sold individually: Order the quantity needed for your rocker/lever service.

Specifications

Vehicle Fitment

Best practice: verify by Engine Serial Number (ESN) on edge-case builds.

• Dodge Ram 2500/3500 5.9L Cummins (12-Valve)
  • 1989–1993 6BT 12V
  • 1994–1998 6BT 12V
• Additional B-Series applications: Common across 3.9L 4B/4BT and 5.9L 6B/6BT industrial/ag platforms (varies by ESN).

Install Notes

• Clean threads and mating surfaces; chase threads if needed for consistent torque.
• Always follow the Cummins service manual for torque values and tightening sequence.
• Inspect removed bolts; replace any with damage, corrosion, or out-of-spec stretch.

What’s Included

• (1) Rocker arm mounting bolt (flange head)

Warranty

Interstate-McBee new parts include manufacturer warranty coverage. Contact us for current terms by part category.

Cross-Reference & Compatibility

Interchanges with Cummins 3920781 and common distributor references such as 3902344, 3903940, and 040050.

Why Buy From CPP Diesel

• Diesel-specialist fitment help for B-Series valvetrain service
• Fast shipping and easy returns
• Real tech support—ESN verification available

FAQ