Product Description
Interstate-McBee M-3907049 Valve Cover Hexagon Flange Bolt – 89–98 5.9L Cummins (12-Valve)
OEM-style hex flange head valve cover bolt engineered for 1989–1998 5.9L Cummins 12-valve (6BT) applications. Direct-fit replacement for Cummins 3907049, delivering proper clamp load and reliable sealing when servicing or replacing valve cover hardware.
- Direct replacement: Matches OE form, fit, and function for Cummins 3907049.
- Hex flange head: Built-in flange distributes load for better gasket retention.
- Durable hardware: Quality aftermarket construction from Interstate-McBee.
- Standard bolt (no stud): Ideal when not using the factory appearance plate.
Specifications
| Interstate-McBee P/N | M-3907049 |
|---|---|
| OEM Cross-Reference | Cummins 3907049 |
| Head Style | Hexagon flange |
| Thread | M8 × 1.25 (reference) |
| Position | Valve cover mounting bolt |
| Sold As | Each (6 standard bolts typically used per engine) |
What’s Included
- (1) Valve cover hex flange bolt
Vehicle Fitment
For best results, verify by engine serial number (ESN).
- Dodge Ram 2500/3500 with 5.9L Cummins 12-Valve (6BT)
- Model Years: 1989–1998 (1st-gen 1989–1993, 2nd-gen 1994–1998)
- Common across B-Series: Also seen on 4BT/6BT B-Series platforms (industrial/ag). Confirm by ESN.
Install Notes
- Replace aged O-rings and valve cover gaskets when servicing the hardware.
- Torque evenly in a cross pattern per the Cummins service manual.
- On many 12V engines, positions #1 and #6 may use a special stud/bolt combo if the factory appearance plate is installed; this is a standard bolt.
Related Service Parts (sold separately)
- Valve Cover Bolt O-Ring: 3910824
- Valve Cover Gasket: 3930906
Warranty
Interstate-McBee new engine parts carry manufacturer warranty coverage. General engine parts are typically covered up to 24 months; certain valve-train items may carry 12 months. For exact terms on this hardware, please contact us.
Why Buy From CPP Diesel
- ESN-verified fitment support by real diesel techs
- Fast shipping, easy returns
- Curated B-Series parts to complete the whole job
FAQ
How many bolts do I need to replace all the valve cover hardware?Most 12-valve applications use six standard bolts. Engines with the factory appearance plate may use special stud/bolt combos at positions #1 and #6; this part is the standard bolt.
Does this bolt include the O-ring?
No. The O-ring is sold separately (Cummins 3910824). We recommend replacing O-rings whenever hardware is serviced.
Will this fit my 24-valve 5.9L (1998.5–2002)?
This listing targets 1989–1998 12-valve engines. Some hardware differs on later 24-valve models—verify by ESN before ordering.
What’s the thread size?
The bolt uses an M8 × 1.25 thread pitch (reference). Always confirm against your OE hardware.
Product Videos
Custom Field
YEAR 1989-1998
MAKE DODGE
ENGINE 5.9L
