Product Description
Genuine Cummins quality starts with the details, and the CUMMINS 3955393 OEM VALVE STEM SEAL delivers the precision oil control your 5.9L or 6.7L Cummins engine requires. Designed for long-term durability, this OEM intake/exhaust valve stem seal restores proper sealing integrity, reduces oil consumption, and protects your valvetrain from premature wear. Whether you're completing a top-end refresh, rebuilding a work truck, or maintaining a high-mileage engine, Cummins 3955393 ensures factory-correct fitment and performance.
FITMENT
- 2003–2007 Dodge Ram 2500/3500 – 5.9L Cummins
- 2007.5–2018 Dodge Ram 2500/3500 – 6.7L Cummins
- Fits both intake and exhaust valve locations
CROSS-REFERENCE / ALTERNATE PART NUMBERS
Cummins: 3955393, 3937125
(Links to Cummins products will be added once URLs are provided.)
FAQ
WHAT DOES A VALVE STEM SEAL DO?
Valve stem seals regulate engine oil flow into the valve guide area. Maintaining proper sealing prevents excessive oil consumption, reduces exhaust smoke, and protects the combustion chamber.
IS THIS SEAL USED FOR BOTH INTAKE AND EXHAUST VALVES?
Yes—Cummins 3955393 is engineered to fit both intake and exhaust valve locations on 5.9L and 6.7L Cummins engines.
CAN I REPLACE JUST ONE VALVE STEM SEAL?
You can, but Cummins recommends replacing all seals during a top-end service to ensure consistent sealing and long-term reliability.
IS THIS A GENUINE CUMMINS PART?
Absolutely. This is an OEM Cummins component, not an aftermarket or reproduction part.
DOES THIS INSTALL WITHOUT MODIFICATION?
Yes—this seal installs using factory procedures and fits exactly like the original equipment.
| Specifications for cummins 3955393 | |
|---|---|
| Brand | Cummins Genuine Parts |
| Part Number | 3955393 |
| GTIN | Not published by Cummins |
| UPC | Not published by Cummins |
| Engine Compatibility | 5.9L & 6.7L Cummins (2003–2018) |
| Cross Reference | 3937125 |
| E-Codes | N/A |
| Shipping Info | Ships via USPS/UPS; lightweight small-parcel item |
| Prop 65 | Not applicable |
