CUMMINS 3921640 GENUINE OEM INTAKE/EXHAUST VALVE STEM SEAL FOR 89-98 DODGE RAM DIESEL

The Cummins 3921640 Valve Stem Seal is a genuine OEM replacement engineered for precise fit and long-term reliability on Dodge Ram Cummins engines.

Fitment

• 1989 Dodge Ram 2500/3500 with Cummins diesel
• 1990 Dodge Ram 2500/3500 with Cummins diesel
• 1991 Dodge Ram 2500/3500 with Cummins diesel
• 1992 Dodge Ram 2500/3500 with Cummins diesel
• 1993 Dodge Ram 2500/3500 with Cummins diesel
• 1994 Dodge Ram 2500/3500 with Cummins diesel
• 1995 Dodge Ram 2500/3500 with Cummins diesel
• 1996 Dodge Ram 2500/3500 with Cummins diesel
• 1997 Dodge Ram 2500/3500 with Cummins diesel
• 1998 Dodge Ram 2500/3500 with Cummins diesel

Key Features

• Genuine Cummins OEM part number 3921640
• Direct-fit valve stem seal built to Cummins specifications
• Durable materials for heat, pressure, and vibration
• Ideal for maintenance, repairs, or rebuilds

Frequently Asked Questions

What do valve stem seals do?

They prevent oil from entering the combustion chamber via the valve guides.

When should they be replaced?

During head work or when you notice smoke on startup or increased oil consumption.

Are these for intake and exhaust?

Yes - designed for both.

Related Categories

• 1994-1998 Cummins Gaskets & Seals
• Cylinder Head Gaskets
• Timing Gear Case & Covers
• Oil Pans & Components
• All Dodge Cummins Categories

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