Product Description
Genuine Cummins
Cummins 3910811 — Intake Rocker Lever (Rocker Arm) for 5.9L 12-Valve
MPN: 3910811 | Also Known As: intake rocker arm, rocker lever | Cross-Refs (identification): 3900540, 3906464, FP-3910811, M-3910811
Why This Part
- ✓ OE geometry & hardness for accurate valve motion and long life.
- ✓ Direct-fit for 1989–1998 5.9L 12-valve B-series (intake position).
- ✓ Sold individually—6 intake rockers per engine (12 total with exhaust).
- ✓ Ideal during cam/valvetrain refresh or when replacing worn components.
OE Fit Intake Position 6 Per Engine
Quick Specs
| Type | Intake rocker lever (rocker arm) |
|---|---|
| OE Part # | 3910811 (intake) · Pair with exhaust rocker 3910810 |
| Qty Required | 6 intake rockers per engine (sold individually) |
| Adjuster/Screw | Common companion: 3937438 adjuster screw |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | 5.9L Cummins 12-Valve (6BT, mechanical) | Dodge Ram 2500/3500 |
Notes: Intake rocker for 12-valve B-series only. Not for 24-valve (1998.5+) or common-rail ISB. Always verify by VIN/ESN.
Often Paired With
- Exhaust Rocker Lever: Cummins 3910810 (’89–’98 5.9L 12V)
- Rocker Arm Adjuster Screw: Cummins 3937438
- Pushrods / Valve Springs: upgrade as needed during service
What’s In The Box
- (1) Genuine Cummins Intake Rocker Lever (3910811)
- Adjusters/screws sold separately (see “Often Paired With”).
Install Tips
- Replace in matched sets when possible; inspect shaft, bridges, and tips for wear.
- Torque to factory spec; set valve lash warm per service manual.
- Re-check lash after initial heat cycle.
FAQ
IS 3910811 THE INTAKE OR EXHAUST ROCKER?3910811 is the intake rocker lever. The matching exhaust rocker is 3910810.
HOW MANY DO I NEED?Six intake rockers per 6-cylinder 12-valve engine (plus six exhaust rockers). This listing is sold individually.
WHAT YEARS/ENGINES DOES THIS FIT?1989–1998 Dodge Ram with the 5.9L 12-valve (6BT) engine. Not for 24-valve or common-rail ISB.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3910811 with OEM metallurgy and geometry for long service life.
DO I NEED NEW ADJUSTER SCREWS?Inspect threads and tips. If worn, pair with new adjuster screws (Cummins 3937438) during rocker replacement.
