Product Description
The CUMMINS 3906698 OEM WATER PUMP RECTANGULAR RING SEAL is designed for 1989–2018 5.9L and 6.7L Cummins diesel engines. This genuine Cummins seal installs between the water pump and engine block to maintain a leak-free coolant seal and proper cooling system performance.
Use this part whenever servicing or replacing the water pump. Replacing the seal during water pump installation helps prevent coolant leaks, overheating, and premature cooling system failures. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM rectangular ring seal
- Direct-fit replacement for water pump service
- Installs between the water pump and engine block
- Helps prevent coolant leaks and loss of cooling system pressure
- Recommended whenever the water pump is removed or replaced
- Designed for long-lasting sealing performance in diesel applications
FITMENT
- 1989–1993 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
- 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
- 2007.5–2018 Ram 2500/3500 6.7L Cummins
- Select Cummins 4BT, 6BT, ISB, and QSB industrial applications
WHAT'S INCLUDED
- 1 Cummins 3906698 OEM Water Pump Rectangular Ring Seal
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3906698
- Cummins 5473238 Water Pump Kit
- Dodge/Ram 04429698
- PAI 121258
- Elring 073.720
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3906698
- Part Type: Water Pump Rectangular Ring Seal
- Engine Compatibility: 5.9L Cummins, 6.7L Cummins
- Fitment Years: 1989–2018
- Vehicle Application: Dodge Ram / Ram 2500 and 3500
- Condition: New OEM Cummins
- Installation Location: Water Pump to Engine Block
- Shipping Weight: Approximately 0.02 lb
- Price: $8.12
FAQ
Will this part fit my truck?
This seal fits many 1989–2018 5.9L and 6.7L Cummins applications. Always verify your year, make, model, engine, and engine serial number before ordering.
Where does this seal install?
The 3906698 rectangular ring seal installs between the water pump and the engine block to seal the coolant passage and prevent leaks.
Should I replace this seal when installing a new water pump?
Yes. Cummins recommends replacing sealing components whenever the water pump is removed or replaced to help ensure a leak-free installation.
Is this a genuine Cummins part?
Yes. This is a genuine Cummins OEM rectangular ring seal manufactured to meet factory specifications.
What happens if this seal fails?
A failed seal can allow coolant leakage at the water pump mounting surface, potentially leading to coolant loss and engine overheating.
Do I need any related parts?
Inspect the water pump, thermostat, hoses, belts, coolant, and related cooling system components during service and replace worn parts as needed.
