Product Description
Interstate-McBee M-3910248 – Bell Housing Adapter Plate Plug (1989–2002 5.9L Cummins)
Replacement plug for the bell housing adapter plate on 5.9L Cummins B-series engines. Restores a proper seal at the adapter plate opening to help prevent debris and fluid intrusion. Sold individually.
- Direct replacement: OE-style fit and function for factory adapter plate.
- Durable construction: Built to withstand heat, vibration, and drivetrain service conditions.
- Easy install: Press-in design; no modifications required when replacing a missing or worn plug.
- Value: Interstate-McBee quality at a cost-effective price.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3910248 |
| OEM Reference | Cummins 3910248 |
| Component | Bell Housing Adapter Plate Plug |
| Sold As | Each (1 plug) |
Vehicle/Engine Fitment
Verify by engine serial number (ESN) when possible.
- 5.9L Cummins B-Series (Dodge Ram 2500/3500)
- Model Years: 1989–2002 (12-valve and early 24-valve)
- Other Cummins B-Series applications where Cummins 3910248 is specified.
What’s Included
- (1) Bell Housing Adapter Plate Plug – P/N M-3910248
Recommended Service Items (Not Included)
- Adapter plate gasket or seal (inspect and replace as needed)
- Rear main seal (if servicing while transmission is removed)
- Fasteners/bolts for adapter plate (replace any stretched or corroded hardware)
- Brake cleaner and lint-free towels for surface prep
Install Notes
- Clean the adapter plate opening thoroughly; remove old sealant or debris.
- Lightly lubricate the plug outer surface to aid installation.
- Press or tap evenly until fully seated; do not distort or overdrive the plug.
- Inspect for proper seating and clearance before reassembly.
Why Buy From CPP Diesel
- Diesel specialists with ESN-verified fitment support
- Fast shipping and easy returns
- Large inventory of B-series engine and drivetrain parts
FAQ
Q: Does this fit both 12-valve and 24-valve 5.9L Cummins?
A: Yes. It is used on 1989–2002 B-series applications where Cummins 3910248 is specified. Verify by ESN for edge cases.
Q: How many plugs are required?
A: This listing is for one plug. Inspect your adapter plate and replace any missing or damaged plugs as needed.
Q: Do I need sealant?
A: Many installs are dry; some technicians use a light, non-hardening sealant film. Follow your service manual and local best practices.
