Product Description
Interstate-McBee M-4931561 Crankshaft Front Seal — 2007.5–2018 6.7L Cummins
Stop front main oil leaks and restore factory sealing performance with the Interstate-McBee M-4931561 front crankshaft (front main) oil seal. Built to OEM-equivalent specs for the 2007.5–2018 6.7L Cummins ISB, this aftermarket replacement delivers a precise fit and long service life. Sold individually.
- Direct replacement: Matches OE dimensions for a proper fit in the timing cover.
- Durable materials: OE-style elastomer lip for reliable sealing.
- Service friendly: Pairs well with a wear-sleeve kit if your crank snout is grooved.
- Value: Interstate-McBee quality at a budget-friendly price.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-4931561 |
| OE Cross-Reference | Cummins 4931561 (also commonly serviced as 3804899; verify by VIN/ESN) |
| Location | Front crankshaft seal (front main) at timing cover |
| Sold As | Each (1 seal) |
Vehicle Fitment
Always verify by VIN/ESN for running changes.
- Ram 2500/3500 with 6.7L Cummins ISB (2007.5–2018)
- Additional ISB/QSB 6.7 industrial/off-highway applications where Cummins 4931561 is specified (confirm by ESN)
What’s Included
- (1) Front crankshaft oil seal, P/N M-4931561
Recommended / Related Parts
- Interstate-McBee M-3802820 Front Crank Seal Kit w/ Wear Sleeve (89–18) — use when the crank snout has a groove.
- Cummins 3802820 OEM Front Seal + Wear Sleeve Kit (89–18)
- Cummins 3804899 OEM Front Crankshaft Seal (03–18) — OE alternative.
- Cummins 4931561 OEM Front Crankshaft Seal (07.5–2025) — OE part reference.
- Cummins 4934041 Timing Gear Case Housing (07.5–18) — replace if damaged during repair.
Install Notes
- Use a dedicated installer tool to set the seal squarely and at the correct depth.
- If the crank snout is worn or grooved, use a wear-sleeve kit so the seal lip runs on a smooth surface.
- Lightly oil the seal lip; avoid dislodging the internal spring.
- Follow the Cummins service manual for torque specs and procedures.
Why Buy From CPP Diesel
- Diesel-specialist support with VIN/ESN verification
- Fast shipping and easy returns
- Deep stock of 6.7L Cummins gaskets, seals, and hard parts
FAQ
Will this fit my 2007.5–2018 Ram 6.7L?
Yes, this listing covers most 2007.5–2018 Ram 2500/3500 6.7L applications. Always verify by VIN/ESN.
Does this include an installation tool or wear sleeve?
No. This is the seal only. If the crank snout is grooved, use a wear-sleeve kit (see related parts above).
Is this the same as the OEM Cummins seal?
This is an aftermarket replacement built to OE-equivalent dimensions. For OEM, see the Cummins listings linked above.
