Product Description
The CUMMINS 3955393 OEM VALVE STEM SEAL is designed for 2003–2018 5.9L and 6.7L Cummins diesel engines. This genuine Cummins valve stem seal is used on both intake and exhaust valves to help control oil consumption, maintain proper valve lubrication, and support long engine life.
Use this part when rebuilding a cylinder head, replacing worn valve seals, or servicing valve train components. Always verify fitment by engine serial number and application before ordering.
FEATURES
- Genuine Cummins OEM valve stem seal
- Fits intake and exhaust valve applications
- Helps control oil consumption and valve guide lubrication
- Direct-fit replacement for factory-installed seals
- Designed for durability and long service life
- Ideal for maintenance, repair, and engine rebuild projects
FITMENT
- 2003–2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail
- 2007.5–2018 Ram 2500/3500 6.7L Cummins
- Select Cummins ISB industrial and commercial applications
WHAT'S INCLUDED
- 1 Cummins 3955393 OEM Valve Stem Seal
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3955393
- Cummins Valve Guides
- Cummins Valve Springs
- Cummins Cylinder Head Gasket Sets
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3955393
- Part Type: Valve Stem Seal
- Application: Intake and Exhaust Valves
- Engine Compatibility: 5.9L Cummins, 6.7L Cummins
- Fitment Years: 2003–2018
- Vehicle Application: Dodge Ram / Ram 2500 and 3500
- Condition: New OEM Cummins
- Installation Type: Direct Replacement
FAQ
Will this part fit my truck?
This valve stem seal fits many 2003–2018 5.9L and 6.7L Cummins applications. Always verify fitment by engine serial number before ordering.
Is this a genuine Cummins part?
Yes. Cummins 3955393 is a genuine OEM valve stem seal manufactured to Cummins specifications.
What does a valve stem seal do?
Valve stem seals regulate the amount of oil that reaches the valve guides while helping prevent excessive oil consumption and smoke from the exhaust.
What are the symptoms of worn valve stem seals?
Common symptoms include increased oil consumption, blue exhaust smoke during startup, carbon buildup, and reduced engine efficiency.
Should valve stem seals be replaced during a cylinder head rebuild?
Yes. Replacing valve stem seals is recommended whenever performing cylinder head service or rebuilding an engine.
Do I need any related parts?
Inspect the valve guides, valves, springs, retainers, keepers, and cylinder head components during installation and replace worn parts as necessary.
