Product Description
Interstate-McBee M-4890833 Rear Crankshaft Oil Seal – 98.5–02 5.9L Cummins
Premium aftermarket, OEM-style rear crankshaft (rear main) oil seal designed for 1998.5–2002 Dodge Ram 2500/3500 5.9L Cummins 24-Valve ISB. The unitized seal assembly helps restore leak-free operation and long service life when servicing the flywheel housing/rear main area.
- OEM-style fit & function: Matches Cummins 4890833 reference for ISB B-series applications.
- Unitized design: Stable lip support and consistent sealing performance.
- Aftermarket value: Interstate-McBee quality at a fraction of OEM kit pricing.
- Seal-only configuration: Ideal when your crank surface is in good condition (repair sleeve not included).
Specifications
| Interstate-McBee Part | M-4890833 |
|---|---|
| OEM Reference | Cummins 4890833 (rear crankshaft oil seal) |
| Type | Unitized rear main (seal only; no wear sleeve) |
| Nominal Dimensions | 5.102" ID × 6.102" OD × 0.625" W (129.60 × 154.99 × 15.87 mm) |
| Position | Rear of crankshaft (flywheel housing) |
| Included | (1) Rear crankshaft oil seal |
Vehicle Fitment
Always verify by Engine Serial Number (ESN) for best results.
- Dodge Ram 2500/3500 – 5.9L Cummins 24-Valve ISB
- 1998.5, 1999, 2000, 2001, 2002
- Additional Applications (engine-side): Part 4890833 is also used across select Cummins B / ISB / QSB platforms (fit varies by ESN and rear housing). Check ESN when outside the above pickup range.
Installation Notes
- Inspect crank sealing surface; if grooved, consider a rear seal + wear sleeve kit (e.g., Cummins 3926126).
- Use a dedicated installer tool for square seating and proper depth.
- Follow the Cummins service manual for orientation, depth, and torque specs; avoid contaminating the sealing lip.
Warranty
Interstate-McBee engine service parts include manufacturer warranty coverage. For terms and claims, contact us or refer to the maker’s current policy.
Why Buy From CPP Diesel
- Diesel-specialist fitment help (ESN verification available)
- Fast shipping & easy returns
- Matching parts in stock (rear cover gasket, housing, flywheel bolts, installer tools)
FAQ
Does M-4890833 include a repair sleeve?No—this listing is for the seal only. If the crank surface is worn, use a kit that includes a wear sleeve (e.g., Cummins 3926126).
Will it fit my 1998.5–2002 5.9L Cummins 24V Ram?
Yes—this Interstate-McBee seal matches the OEM 4890833 spec used on 98.5–02 5.9L ISB applications. Verify by ESN to avoid housing variances.
Is this compatible with other B/ISB/QSB engines?
4890833 is used across various B/ISB/QSB engines, but applications vary by ESN and rear housing. Check your ESN for confirmation.
How do I know if I need the sleeve-type kit instead?
If there’s a groove on the crank sealing surface or prior leakage left damage, choose a seal kit with a wear sleeve for a proper repair.
What installer tool is recommended?
A rear main seal installer designed for Cummins B/ISB engines ensures correct depth and alignment; this reduces rework and leaks.
