Product Description
Interstate-McBee M-4945701 Rear Camshaft / Bellhousing Adapter Seal – 03–21 5.9L/6.7L Cummins
Direct-fit rectangular ring seal that sits between the engine block and bellhousing adapter to seal the rear camshaft port on 2003–2021 Cummins ISB engines used in Ram 2500/3500 trucks. OE-style aftermarket replacement.
- OE-equivalent construction: Matches Cummins sealing profile for reliable leak prevention.
- Correct application: Designed for common-rail 5.9L (2003–2007) and 6.7L (2007.5–2021) Cummins engines.
- Service friendly: Ideal to replace anytime the rear cover, adapter, or rear main seal is serviced.
- Value: Interstate-McBee quality at a great price point.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-4945701 |
| OEM Reference | Cummins 4945701 |
| Location | Rear camshaft / bellhousing adapter interface |
| Material | OE-style elastomer rectangular ring |
| Sold As | Each (1 seal) |
What’s Included
- (1) Rear camshaft / bellhousing adapter seal, P/N M-4945701
Vehicle Fitment
Always verify by VIN/ESN when possible.
- Ram 2500/3500 with Cummins ISB
- 5.9L 24-valve (Common-Rail): 2003–2007
- 6.7L 24-valve: 2007.5–2021
Recommended / Related Parts
- Cummins OEM 4945701 Rear Cam / Adapter Seal (OE alternative)
- Interstate-McBee M-5259499 Rear Main Crankshaft Seal (1989–2018)
- MAHLE 48384 Rear Main Seal (1989–2018)
- Interstate-McBee M-3902332 Camshaft Woodruff Key (1989–2018)
- Camshafts & Valvetrain (03–07 5.9L) | Engine Parts (13–18 6.7L)
Install Notes
- Clean mating surfaces thoroughly; remove old seal residue and debris.
- Lightly lubricate the new seal and seat squarely in the adapter groove.
- Torque adapter hardware to factory spec and verify crankcase ventilation is functioning (excessive crankcase pressure can cause leaks).
Why Buy From CPP Diesel
- OE/ESN-verified fitment support from diesel specialists
- Fast shipping, easy returns, and real-world tech help
- Deep stock of Cummins gaskets, seals, and valvetrain service parts
FAQ
Is this the same as the rear main crankshaft seal?
No—the rear cam / adapter seal is separate from the crankshaft rear main seal. For rear main, see the options listed above.
Will this fit a 2001 5.9L?
No. 1989–2002 engines use a different rear cover/adapter design. This seal is for 2003–2021 common-rail applications.
How many do I need?
One per engine. Replace anytime the bellhousing adapter is removed or leaks are present.
