Product Description
CUMMINS 3910811 OEM INTAKE ROCKER LEVER (ROCKER ARM) – 5.9L 12-VALVE (1989–1998)
The Cummins 3910811 OEM Intake Rocker Lever is the factory-correct intake-side rocker arm used on all 1989–1998 Dodge Ram 2500/3500 models equipped with the 5.9L 12-Valve Cummins (6BT). This genuine Cummins rocker ensures accurate valve lift, dependable geometry, and proper oiling—critical in high-heat diesel valvetrain environments.
Whether you're rebuilding a tired 12-valve valvetrain, repairing cam/rocker wear, or performing a full top-end refresh, choosing genuine Cummins 3910811 guarantees OEM-level durability and perfect fitment every time.
Key Features & Benefits
- Exact OEM intake rocker arm for the 5.9L 12V Cummins 6BT.
- Precision-machined to match factory cam profiles and valve lift.
- Hardened contact pads for long service life.
- Correct oil metering to lubricate the intake valve and adjuster.
- Direct replacement for worn or noisy intake rockers—no modification required.
Fitment
- 1989–1993 Dodge D/W 2500–3500 with 5.9L 12-Valve Cummins
- 1994–1998 Dodge Ram 2500–3500 with 5.9L 12-Valve Cummins
- Cummins 6BT 5.9L B-series industrial applications (verify via ESN)
Cross-Reference (Cummins-Only)
Pair with related genuine Cummins valvetrain components:
- Cummins 3910810 OEM Exhaust Rocker Lever – 5.9L 12V
- Cummins 3904409 Valve Stem Guide – 51.75mm
- Cummins 3922488 Rocker Lever Shaft – 12-Valve
Installation Notes
- Set valve lash to Cummins factory specifications after installation.
- Inspect rocker shaft and adjusters—replace if worn.
- Always rotate engine by hand and recheck lash before first startup.
Specifications for cummins 3910811
| Specification | Value |
|---|---|
| Brand | Cummins Genuine Parts |
| Part Number | 3910811 |
| Component | Intake Rocker Lever / Rocker Arm |
| UPC | Not Published |
| GTIN | Not Published |
| Cross Reference | Used with 3910810 (exhaust rocker) |
| E-Codes | Euro 2 / B-series where listed |
| Shipping Weight | 0.25–0.35 lb |
| Package Dimensions | 3 x 2 x 2 in |
| Prop 65 Warning | This product may expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information visit www.P65Warnings.ca.gov. |
FAQ
Is 3910811 the intake or exhaust rocker?
3910811 is the intake rocker arm. The exhaust rocker is Cummins part number 3910810.
How many intake rockers does a 5.9L 12V Cummins use?
The 12-valve Cummins uses six intake and six exhaust rockers—one per valve.
Should I replace the rocker shaft when installing new rockers?
If the shaft shows scoring, uneven wear, or oiling restriction, replace it. A worn shaft accelerates rocker wear.
Does this rocker come with an adjusting screw?
No. Adjusters are sold separately. Replace worn or mushroomed adjusters during service.
Is this rocker compatible with aftermarket cams?
Yes for mild upgrades, but high-lift performance cams may require upgraded valvetrain components.
