How do you change the thermostat on a 2003 Dodge Durango?

Answer 1

The thermostat for a 2003 4.7 is at the end of the bottom hose not the top. The 2003 4.7 is the only one at the bottom. You have to undo the bottom hose from the engine and the gasket is the rubber around the thermostat and the spring goes on the engine side.

1. Drain cooling system and dispose of coolant properly.

2. Remove lower hose from entry at thermostat housing connected at engine block and remove thermostat housing.

3. Remove old thermostat and replace with new thermostat spring side on engine side, there is also a tab that aligns with thermostat housing to prevent improper installation.

4. Replace thermostat housing.

5. Replace lower radiator hose.

6. Fill cooling system with manufacture directed coolant and check for leaks.

7. Run engine until thermostat opens and bleed air from cooling system.