Product Description
CUMMINS 4890833 OEM REAR MAIN CRANKSHAFT OIL SEAL – RAM 6.7L (2007.5–2018) / SELECT 5.9L BY ESN
Genuine Cummins 4890833 rear main crankshaft oil seal is the OE solution for stopping rear main leaks on Tier 3 ISB/QSB 6.7L engines and select 5.9L ISB applications. Designed to Cummins specifications, this unitized rear crankshaft seal helps keep oil where it belongs, protects your clutch or torque converter from contamination, and restores factory-level reliability on your Ram 2500/3500 or industrial ISB/QSB platform.
Key Features
- OE Cummins rear crankshaft (rear main) oil seal for ISB/QSB applications.
- Unitized seal design engineered to control oil and resist heat, debris, and crankshaft runout.
- Used primarily on Tier 3 6.7L ISB/QSB engines; also found on select 5.9L ISB blocks (verify by ESN).
- Helps prevent oil contamination of the flywheel, clutch, or torque converter.
- Genuine Cummins quality for long life and proper crankshaft sealing.
Fitment Details
Primary automotive fitment (Ram light duty):
- 2007.5–2018 Ram 2500/3500, 6.7L ISB (24V common-rail) – verify by VIN/ESN.
- 2003–2007 Ram 2500/3500, 5.9L ISB (select engine blocks only, ESN-dependent).
Common non-pickup / industrial usage (verify by ESN and application):
- ISB3.9 / ISB 5.9 / QSB6.7 industrial and construction engines where 4890833 is specified.
- Applications using equivalent crankshaft seal dimensions cross-referenced to 4890833.
Important: Cummins notes that 4890833 is used primarily on Tier 3 6.7L ISB/QSB engines; some 5.9L ISB and other platforms use alternate rear main seals such as Cummins 5259499. Always confirm by VIN/ESN or Cummins QuickServe before ordering.
Cross-Reference & Related Cummins Parts
OEM & aftermarket cross-reference numbers (for ID only, not brand substitution):
- Cummins: 4890833 (this part), 4089342, 3934486 (exchange numbers).
- Interstate-McBee: M-4890833 (aftermarket).
- Victor Reinz: 81-36999-00 (cross-reference; EAN/GTIN 4026634387511).
- Elring: 477.740 (cross-reference shaft seal).
Recommended Cummins OEM companions on CPP Diesel (clickable Cummins-only links):
- Rear Main Seal Alternative (many 5.9L/6.7L ESNs): CUMMINS 5259499 OEM REAR MAIN CRANKSHAFT SEAL – RAM 5.9L/6.7L (1989–2018)
- Front Crankshaft Seal: CUMMINS 3804899 OEM FRONT CRANKSHAFT SEAL – RAM 5.9L/6.7L (2003–2018)
- Front Crankshaft Seal with Wear Sleeve: CUMMINS 3802820 OEM FRONT CRANKSHAFT SEAL WITH WEAR SLEEVE – RAM 5.9L/6.7L (1989–2018)
- Crankshaft Thrust Bearing (STD): CUMMINS 4938948 OEM CRANKSHAFT THRUST BEARING – 5.9L/6.7L (1989–2018)
- Oil Cooler Core Gasket (Oil Cooler to Block): CUMMINS 4932124 OEM OIL COOLER CORE GASKET – RAM 5.9L (1989–2002)
Quick Specs
- Part Number: Cummins 4890833
- Function: Rear crankshaft (rear main) oil seal
- Design: Unitized seal assembly, one per engine
- Reference Dimensions: ~5.102" ID × 6.102" OD × 0.625" width (approx., for ID only)
- Typical Use: Tier 3 6.7L ISB/QSB; select 5.9L ISB and related industrial applications
Install Notes
- Always inspect the crankshaft sealing surface. If grooves or wear are present, use the appropriate wear-sleeve kit before installing the new seal.
- Follow Cummins service procedures for seal depth, orientation, and installer tooling.
- After installation, road-test and re-inspect for leaks after warm-up.
Specifications for cummins 4890833
| Specifications for cummins 4890833 | |
|---|---|
| Brand | Cummins – Genuine OEM |
| Part Number | 4890833 |
| UPC | Not published by Cummins (refer to OEM packaging) |
| GTIN / EAN | 4026634387511 (common EAN used on Victor Reinz 81-36999-00 / Elring 477.740 cross-references for equivalent crankshaft seal; reference only, not Cummins packaging) |
| Product Type | Rear crankshaft (rear main) oil seal, unitized |
| Typical Applications | Tier 3 ISB/QSB 6.7L; select ISB 5.9L and related industrial engines (verify by ESN) |
| Cross Reference | Cummins 4089342, Cummins 3934486 (exchange numbers); Interstate-McBee M-4890833; Victor Reinz 81-36999-00; Elring 477.740; additional heavy-duty equivalents where 4890833 is listed. |
| E-Codes / Emissions Notes | Primarily Tier 3 on-road and off-highway ISB/QSB 6.7L platforms; exact emissions family varies by ESN and chassis – confirm with Cummins QuickServe or ESN lookup. |
| Shipping Info (CPP Diesel) | Ships from CPP Diesel; packaged weight typically under 1 lb. Store-front listings such as Yard Truck and others note approximate packaged dimensions around 6 × 6 × 2 inches. |
| Country of Origin | Varies by Cummins batch (commonly marked on OE box – check packaging) |
| Prop 65 Warning | This product may expose you to chemicals including oil and fuel residues, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov. |
FAQ
Will this Cummins 4890833 rear main seal fit my 6.7L Ram?In most cases, yes. Cummins 4890833 is the OE rear main seal used on many 2007.5–2018 6.7L ISB engines found in Ram 2500/3500 trucks and related Tier 3 ISB/QSB platforms. Always confirm fitment by VIN/ESN or Cummins QuickServe before ordering.
Does this seal also fit 5.9L ISB engines?
It fits some 5.9L ISB engines, particularly later 2003–2007 applications and certain non-U.S. castings, but many 5.9L blocks use Cummins 5259499 instead. The only safe way to know is to check your ESN and parts breakdown.
What is the difference between Cummins 4890833 and 5259499 rear main seals?
Both are genuine Cummins rear main seals for B-Series engines. Part 4890833 is associated primarily with Tier 3 6.7L ISB/QSB and select 5.9L ESNs, while 5259499 covers a broader range of 1989–2018 Ram 5.9L/6.7L applications. Design and coverage differ by block and application, so always confirm by ESN before choosing one over the other.
Do I need a wear sleeve kit when installing this seal?
If the crankshaft sealing surface shows grooves, pitting, or heavy wear, Cummins recommends using a wear-sleeve kit before installing the new seal. A common companion is the rear main wear-sleeve kit cross-referenced to 3926126. Addressing crank wear ensures the new seal can do its job and prevents repeat leaks.
Is this a genuine Cummins part or an aftermarket replacement?
This listing is for a genuine Cummins OEM rear main crankshaft oil seal under part number 4890833, sourced through CPP Diesel. Aftermarket numbers such as Interstate-McBee M-4890833 or various Victor Reinz/Elring references are listed only as cross-reference information for ID purposes.
