CUMMINS 3906698 GENUINE WATER PUMP RECTANGULAR RING SEAL - OEM FOR 1989-2018 5.9L & 6.7L CUMMINS

The Cummins 3906698 Genuine Water Pump Rectangular Ring Seal is the OEM sealing ring used on Cummins diesel engines to ensure a leak-free connection between the water pump and engine block. Designed for 5.9L and 6.7L Cummins engines, this precision-molded rectangular ring resists heat, pressure, and coolant chemicals for long-lasting sealing performance.

Replacing the water pump? Always install a new OEM seal to maintain proper coolant system integrity and prevent leaks.

Features & Benefits

• OEM Quality: Manufactured to Cummins specifications for perfect fit and durability.
• Heat & Coolant Resistant: Withstands extreme operating temperatures and chemical exposure.
• Direct Fit: Designed to work with factory water pumps for quick installation.

Cross Reference Part Numbers

• Cummins 3906698
• Interstate McBee M-3906698
• Replaces OEM water pump sealing rings in Cummins diesel applications

Frequently Asked Questions

Should I replace this seal every time I remove the water pump?

Yes. Cummins recommends replacing the seal anytime the water pump is removed to ensure a leak-free connection.

Does this seal work with aftermarket water pumps?

Yes, as long as they are designed to OEM specifications for Cummins engines.

Is this seal the same as an O-ring?

No. This is a rectangular ring seal specifically shaped for Cummins water pump housings.

Fitment

• 1989 Dodge Ram 2500/3500 5.9L Cummins
• 1990 Dodge Ram 2500/3500 5.9L Cummins
• 1991 Dodge Ram 2500/3500 5.9L Cummins
• 1992 Dodge Ram 2500/3500 5.9L Cummins
• 1993 Dodge Ram 2500/3500 5.9L Cummins
• 1994 Dodge Ram 2500/3500 5.9L Cummins
• 1995 Dodge Ram 2500/3500 5.9L Cummins
• 1996 Dodge Ram 2500/3500 5.9L Cummins
• 1997 Dodge Ram 2500/3500 5.9L Cummins
• 1998 Dodge Ram 2500/3500 5.9L Cummins
• 1999 Dodge Ram 2500/3500 5.9L Cummins
• 2000 Dodge Ram 2500/3500 5.9L Cummins
• 2001 Dodge Ram 2500/3500 5.9L Cummins
• 2002 Dodge Ram 2500/3500 5.9L Cummins
• 2003 Dodge Ram 2500/3500 5.9L Cummins
• 2004 Dodge Ram 2500/3500 5.9L Cummins
• 2005 Dodge Ram 2500/3500 5.9L Cummins
• 2006 Dodge Ram 2500/3500 5.9L Cummins
• 2007 Dodge Ram 2500/3500 5.9L Cummins
• 2008 Dodge Ram 2500/3500 6.7L Cummins
• 2009 Dodge Ram 2500/3500 6.7L Cummins
• 2010 Dodge Ram 2500/3500 6.7L Cummins
• 2011 Dodge Ram 2500/3500 6.7L Cummins
• 2012 Dodge Ram 2500/3500 6.7L Cummins
• 2013 Dodge Ram 2500/3500 6.7L Cummins
• 2014 Dodge Ram 2500/3500 6.7L Cummins
• 2015 Dodge Ram 2500/3500 6.7L Cummins
• 2016 Dodge Ram 2500/3500 6.7L Cummins
• 2017 Dodge Ram 2500/3500 6.7L Cummins
• 2018 Dodge Ram 2500/3500 6.7L Cummins

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