Product Description
The CUMMINS 3946849 OEM 190° COOLANT THERMOSTAT is designed for 1998.5–2002 5.9L Cummins diesel engines. This genuine Cummins thermostat helps regulate coolant flow and maintain proper engine operating temperature for optimal performance, efficiency, and engine protection.
Use this part when replacing a worn thermostat, correcting cooling system issues, or performing preventative maintenance. Always verify fitment by year, make, model, engine, and engine serial number before ordering.
FEATURES
- Genuine Cummins OEM coolant thermostat
- 190° operating temperature rating
- Designed for 1998.5–2002 5.9L Cummins applications
- Helps maintain proper engine operating temperature
- Supports efficient cooling system performance
- Direct-fit replacement part
FITMENT
- 1998.5–2002 Dodge Ram 2500 5.9L Cummins
- 1998.5–2002 Dodge Ram 3500 5.9L Cummins
- Select Cummins ISB 5.9L industrial applications
WHAT'S INCLUDED
- 1 Cummins 3946849 OEM 190° Coolant Thermostat
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3946849
- Thermostat housing gasket
- Cooling system service components
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3946849
- Part Type: Coolant Thermostat
- Temperature Rating: 190°F
- Engine Compatibility: 5.9L Cummins ISB
- Fitment Years: 1998.5–2002
- Vehicle Application: Dodge Ram 2500 / 3500
- Condition: New
- Quantity: Sold Individually
FAQ
Will this part fit my truck?
This thermostat fits 1998.5–2002 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L Cummins engine. Always verify fitment before ordering.
Is this a direct replacement?
Yes. Cummins 3946849 is a direct-fit OEM replacement thermostat for the listed applications.
What is included?
This listing includes one Cummins 3946849 OEM 190° coolant thermostat.
What does the thermostat do?
The thermostat regulates coolant flow through the engine and radiator to help maintain proper operating temperature and cooling system efficiency.
When should a thermostat be replaced?
Replace the thermostat if it becomes stuck open, stuck closed, causes temperature fluctuations, or during major cooling system service.
Do I need any related parts?
Inspect the thermostat housing gasket, radiator hoses, coolant, water pump, and other cooling system components during installation and replace worn parts as necessary.
