Product Description
Interstate-McBee M-3910810 Exhaust Rocker Lever – 89–98 5.9L Cummins (12-Valve)
Restore smooth valve operation on your 1989–1998 Dodge Ram 5.9L Cummins 12-valve with this OEM-style exhaust rocker lever from Interstate-McBee. Built to OEM dimensions for direct fit and dependable service life—ideal for maintenance or full top-end refreshes.
- Direct-fit replacement: Installs in the factory location for quick, precise alignment.
- OEM-equivalent quality: Manufactured to meet or exceed original specs for consistent performance.
- Durable steel construction: Designed for heavy-duty diesel cycling and long wear life.
- Budget-friendly: Aftermarket value with proven reliability versus OEM-boxed parts.
Specifications
| Brand | Interstate-McBee |
|---|---|
| Part Number | M-3910810 |
| OEM Cross-Reference | Cummins 3910810 |
| Application | Exhaust rocker lever (rocker arm), valvetrain |
| Engine | Cummins 5.9L B-Series, 12-Valve (6BT/early ISB) |
| Material | Steel |
| Position | Exhaust |
Vehicle Fitment
Always verify with your engine serial number (ESN) for best results.
- 1989–1993 Dodge D250, D350, W250, W350 – 5.9L Cummins 12V
- 1994–1998 Dodge Ram 2500, Ram 3500 – 5.9L Cummins 12V
What’s Included
- (1) Exhaust rocker lever, M-3910810
Install Notes
- Inspect pushrods, bridges, pedestals, and rocker shafts; replace worn components.
- Lubricate contact points and follow the Cummins service manual for torque & lash settings.
- After installation, set valve lash to spec on a cold engine and re-check after initial run-in.
Warranty
Interstate-McBee new diesel engine parts carry manufacturer warranty coverage (typically up to 24 months from installation). See official policies or contact us for specific coverage on valvetrain components.
Cross-Sell & Complements
- Intake Rocker Lever – Interstate-McBee M-3910811
- Valve Spring Keepers (M-3900250) and Retainers (M-3900299)
- Head Gasket, Pushrods, Rocker Shaft Assemblies, Pedestals
Why Buy From CPP Diesel
- ESN-verified fitment support from real diesel techs
- Fast shipping, easy returns, and competitive pricing
- Curated B-Series catalog to complete your repair in one order
FAQ
Will this fit all 1989–1998 5.9L Cummins 12-valve trucks?Yes, it is listed for 1989–1998 Dodge 5.9L Cummins applications. Verify with ESN for edge cases and mixed-year builds.
Is this an OEM part?
No, this is an aftermarket OEM-style part by Interstate-McBee. The OEM cross-reference is Cummins 3910810.
Do I need to replace the intake rocker at the same time?
It’s not required, but recommended to inspect/replace the companion intake rocker (M-3910811) and related hardware for balanced wear.
What valve lash should I set after install?
Follow the Cummins service manual for your exact engine. Typical 12-valve 5.9L specs are engine-specific—always confirm and adjust on a cold engine.
What’s the warranty?
Interstate-McBee provides manufacturer warranty coverage on new diesel engine parts (commonly up to 24 months from installation). Contact us for exact terms.
