Product Description
CUMMINS 3907049 OEM VALVE COVER BOLT – 5.9L 12-VALVE (1989–1998)
The genuine CUMMINS 3907049 OEM valve cover bolt is the factory-correct fastener for securing the valve covers on 1989–1998 5.9L 12-valve Cummins engines. These bolts are engineered to apply the proper clamping load, preventing leaks caused by loose, stripped, or corroded hardware. Using real Cummins fasteners ensures correct thread engagement, exact shoulder length, and long-term durability—critical when maintaining your 12-valve’s top-end sealing.
If your engine shows signs of oil seepage around the valve covers, or your original bolts are missing or damaged, replacing them with authentic Cummins hardware restores reliability and keeps the engine bay clean. These bolts work with both OE-style stamped steel covers and most replacement covers designed for the 1989–1998 12V Cummins platform.
Key Features
- Genuine Cummins OEM fastener for perfect fitment and correct clamping force.
- Direct replacement for worn, missing, or stripped valve cover bolts.
- Prevents oil leaks caused by incorrect or insufficient hardware.
- Corrosion-resistant materials for long service life.
- Fits all 1989–1998 5.9L 12-valve Cummins B-series engines.
Fitment Details
- Engine: Cummins 5.9L 12-Valve (6BT, 1989–1998)
- Applications: Dodge Ram 2500 & 3500 (1989–1998)
- Position: Valve cover retaining bolt
- Notes: Sold individually—verify total quantity needed (typically 12 bolts for all six covers).
Cross-Reference & Companion Cummins Parts
For a complete, leak-free top-end refresh, pair CUMMINS 3907049 with these Cummins components available at CPP Diesel:
- VIEW ALL CUMMINS OEM PARTS – full Cummins product catalog.
Common Cummins cross-reference numbers: 3907049, 3907049NX (verify by VIN/ESN).
Installation Notes
- Clean threads and sealing surfaces before installation.
- Do not overtighten—excess torque can warp the valve covers.
- Replace valve cover gaskets if seepage is already present.
- Inspect all bolts for uniform thread engagement.
Specifications for cummins 3907049
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 3907049 |
| Alternate Part Numbers | 3907049NX (verify by VIN/ESN) |
| Function | Valve cover retaining bolt |
| Engine Compatibility | 5.9L 12-Valve Cummins (6BT), 1989–1998 |
| Vehicle Fitment | Dodge Ram 2500 / 3500 (1989–1998) |
| UPC | 190910281448 |
| GTIN | 190910281448 |
| Shipping Weight | Approx. 0.05 lbs |
| Shipping Method | Standard ground; expedited available |
| E-Codes / Emissions | Not emissions related |
| Prop 65 Warning | WARNING: This product may expose you to chemicals known to the State of California to cause cancer and reproductive harm. Visit www.P65Warnings.ca.gov. |
| Country of Origin | As labeled by Cummins (varies by batch) |
Frequently Asked Questions
HOW MANY BOLTS DO I NEED FOR A 12-VALVE CUMMINS?
Most 12-valve Cummins engines use twelve bolts total—two per valve cover. Always verify based on your specific model year and cover style.
CAN I MIX AFTERMARKET AND OEM BOLTS?
It is not recommended. OEM bolts ensure correct length, thread pitch, and clamping force, which prevents uneven sealing and oil leaks.
ARE THESE BOLTS REUSABLE?
Yes, as long as they are not stripped, corroded, or stretched. Replace any questionable hardware.
WHAT GASKETS SHOULD I REPLACE AT THE SAME TIME?
It is best to replace valve cover gaskets whenever hardware is serviced. Browse all OEM Cummins parts here: CUMMINS CATEGORY.
IS THIS A GENUINE CUMMINS PART?
Yes—CPP Diesel supplies only authentic Cummins OEM hardware for proper fit and long-term reliability.
