Product Description
Interstate-McBee M-3910811 Intake Rocker Lever – 1989–1998 5.9L Cummins 12-Valve (Aftermarket Replacement)
Direct-fit replacement intake rocker lever for the 5.9L Cummins 12-valve (6BT). Manufactured to OE form and geometry for reliable valvetrain operation. Sold individually.
- OE-equivalent fit: Installs in the factory position on the rocker shaft.
- Stable valve control: Correct ratio and contact pattern for intake valves.
- Durable construction: Built for daily use, towing, and work duty.
- Budget-friendly: Interstate-McBee quality without OEM-box pricing.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3910811 |
| Application | Intake rocker lever (12-valve 6BT) |
| Sold As | Each (1 rocker lever) |
| Typical Quantity Required | 6 intake rocker levers per engine |
What’s Included
- (1) Intake rocker lever, P/N M-3910811
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 with 5.9L Cummins (12-valve 6BT)
- Model Years: 1989–1998
- Other Cummins B-Series 6BT applications specifying this intake rocker lever (confirm by ESN).
Recommended/Related Parts
- Exhaust rocker lever (match to your engine build)
- Rocker shaft and pedestals
- Bridges (crossheads), lash caps as applicable
- Adjusting screw and lock nut
- Valve springs, keepers, retainers (if refreshing the whole valvetrain)
- Valve cover gasket set
Install Notes
- Set valve lash to factory spec after installation (engine at operating temp unless otherwise specified).
- Inspect shaft, bushings, pads, and bridges for wear; replace as needed.
- Lubricate contact points and torque fasteners per Cummins service manual.
- Service one cylinder at a time and rotate the engine to the correct position before adjusting.
Why Buy From CPP Diesel
- ESN-verified fitment help from diesel specialists
- Fast shipping and easy returns
- Extensive inventory of Cummins B-Series valvetrain parts
FAQ
Is this the intake or exhaust rocker?
This part is the intake rocker lever. The exhaust rocker lever is different—order separately to match your engine.
How many do I need?
The 12-valve 5.9L uses six intake and six exhaust rockers—six of this part for a complete intake set.
Does it include the adjusting screw and nut?
No. Reuse your hardware if in good condition, or replace with new adjusting screws and lock nuts.
Will this fit 24-valve (1998.5–2002) engines?
No. This listing is for 12-valve engines only.
