Product Description
Interstate-McBee M-3900267 Tappet Cover Bolt Seal – 1989–1998 5.9L Cummins (12V)
Restore a leak-free seal on your 5.9L Cummins 12-valve with this OEM-style tappet (pushrod) cover bolt grommet/seal. The Interstate-McBee M-3900267 is a direct aftermarket replacement for Cummins 3900267, engineered for proper clamping force and long-term oil resistance. Sold individually—six (6) required per engine.
- Direct replacement: Matches OEM form/fit/function for the 1989–1998 5.9L Cummins 12V.
- Reliable sealing: Helps prevent oil weep around tappet cover bolt heads.
- Aftermarket value: Interstate-McBee quality at a budget-friendly price.
Specifications
| Interstate-McBee Part | M-3900267 |
|---|---|
| OEM Cross-Reference | Cummins 3900267 |
| Position | Tappet (pushrod) cover bolt grommet/seal |
| Quantity Needed | Six (6) per engine |
| Sold As | Each (individually) |
Vehicle Fitment
Fitment confirmed for 12V engines; always verify by VIN/ESN on edge cases.
- Dodge Ram 2500/3500 – 5.9L Cummins (12-Valve):
- Model Years: 1989–1998
- Also used on Cummins B-Series (4B/6B) family in select applications (check ESN).
Helpful Notes
- Pair with a fresh tappet cover gasket during service for best results.
- Clean mating surfaces and torque hardware to factory spec per Cummins service manual.
Why Buy From CPP Diesel
- Application-specific diesel inventory with expert tech support.
- Fast shipping and easy returns.
- ESN verification available for confident fitment.
FAQ
How many seals do I need?Six (6) per engine—one for each tappet cover bolt.
Is this for 12-valve or 24-valve?
This M-3900267 seal fits the 1989–1998 12-valve 5.9L Cummins. Later 24-valve (1998.5–2002) engines use a different grommet.
Sold individually or as a set?
Sold individually (each). Add six (6) to your cart for a complete engine set.
What other parts should I replace at the same time?
We recommend a new tappet cover gasket and inspecting the tappet cover itself for warp or damage.
Product Videos
Custom Field
YEAR 1989-1998
MAKE DODGE
ENGINE 5.9L
