Product Description
Cummins 4931561 — Front Crankshaft Oil Seal (Front Main)
MPN: 4931561 | Also Known As: front main seal, crank seal | Cross-Ref: 3968275
Genuine Cummins front crankshaft seal engineered to stop oil leaks at the timing cover and protect your 6.7L’s bearings and accessory drive. Includes the plastic guide to ease installation. Direct-fit for Ram 6.7L ISB (2007.5–2025; verify by VIN for late-year running changes).
Why This Part
- ✓ OE sealing lip & material for long service life.
- ✓ Direct-fit replacement—no guesswork.
- ✓ Includes plastic install guide to protect the seal during install.
- ✓ Prevents oil drips and maintains proper oil pressure.
Quick Specs
| Type | Front crankshaft (front main) oil seal |
|---|---|
| OE Part # | 4931561 (cross-ref 3968275) |
| Includes | Plastic installation guide |
| Qty Required | 1 per engine (sold individually) |
| Location | Front cover / timing cover |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2007.5–2025 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: ISB6.7/QSB6.7 (EPA13+)—always confirm by ESN before ordering.
Often Paired With
- Seal Installer Tool: Cummins 3824498 (front seal installation tool)
- Harmonic Balancer Bolt: ARP 147-2503
- Damper: Fluidampr 920321 (6.7L)
- Sealant: MAHLE JV8 RTV for cover corners
What’s In The Box
- (1) Genuine Cummins Front Crankshaft Seal (4931561) with plastic guide
- Tools/gaskets sold separately (see “Often Paired With”).
Install Tips
- Inspect the crank snout & cover bore; clean and lightly oil per service manual.
- Use an installer tool to drive the seal squarely; avoid lip damage.
- Verify damper condition and bolt torque; check for leaks on heat cycle.
FAQ
WILL THIS FIT MY 6.7L CUMMINS RAM?Yes—this is the OE front main seal for most 2007.5–2025 Ram 6.7L applications. Always verify by VIN due to running changes in later years.
DOES IT INCLUDE AN INSTALLATION GUIDE?Yes—this seal includes the plastic install guide to help avoid lip damage during installation.
DO I NEED A SPECIAL INSTALLER TOOL?It’s highly recommended. Cummins tool 3824498 ensures the seal seats squarely and at the proper depth.
WILL THIS FIT 5.9L TRUCKS?No—this listing targets 6.7L applications. Use the 5.9L-specific front seal for earlier engines.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 4931561 with correct lip profile and materials for long-term sealing.
