Product Description
The CUMMINS 3906697 OEM WATER INLET CONNECTION SEAL (RECTANGULAR RING O-RING) is designed for 1994–2025 5.9L and 6.7L Cummins diesel engines. This genuine Cummins cooling system seal provides a leak-free connection between the water inlet connection and related cooling system components while maintaining OEM fitment and reliability.
Use this seal whenever servicing the water inlet connection, replacing cooling system components, repairing coolant leaks, or performing engine maintenance. Always replace worn or damaged seals during cooling system repairs to help ensure proper sealing and long-term durability.
FEATURES
- Genuine Cummins OEM water inlet connection seal
- Rectangular ring O-ring design
- Direct-fit replacement for factory cooling system applications
- Helps prevent coolant leaks and loss of system pressure
- Designed for long service life and reliable sealing performance
- Recommended during cooling system service and repairs
FITMENT
- 1994–1998 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
- 1998.5–2002 Dodge Ram 2500/3500 5.9L Cummins 24-Valve
- 2003–2007 Dodge Ram 2500/3500 5.9L Cummins Common Rail
- 2007.5–2025 Ram 2500/3500/4500/5500 6.7L Cummins
- Select Cummins industrial, commercial, agricultural, marine, and power generation applications
WHAT'S INCLUDED
- 1 Cummins 3906697 OEM Water Inlet Connection Seal
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3906697
- Water Inlet Connection Components
- Cummins Water Pumps
- Cummins Thermostats and Thermostat Housings
- Cummins Cooling System Gaskets and Seals
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3906697
- Part Type: Water Inlet Connection Seal
- Seal Style: Rectangular Ring O-Ring
- Engine Compatibility: 5.9L Cummins, 6.7L Cummins
- Fitment Years: 1994–2025
- Vehicle Application: Ram 2500, 3500, 4500, and 5500
- Condition: New OEM Cummins
- System: Engine Cooling System
- Installation Type: Direct Replacement
FAQ
Will this seal fit my truck?
This seal fits many 1994–2025 5.9L and 6.7L Cummins applications. Always verify fitment by engine serial number or part number before ordering.
Is this a genuine Cummins seal?
Yes. Cummins 3906697 is a genuine OEM Cummins water inlet connection seal.
What does this seal do?
This rectangular ring O-ring seals the water inlet connection and helps prevent coolant leaks while maintaining proper cooling system pressure.
When should this seal be replaced?
This seal should be replaced whenever the water inlet connection is removed, during cooling system repairs, or whenever coolant leakage is present.
Can a damaged seal cause coolant leaks?
Yes. A worn, flattened, cracked, or damaged seal can allow coolant leakage and may contribute to cooling system pressure loss.
Do I need any related parts?
Inspect the water inlet connection, thermostat housing, water pump, hoses, clamps, and related cooling system gaskets during service and replace worn components as necessary.
