Non 4.7L
Follow the top radiator hose to the top of the engine intake. The hose goes on to the thermostat housing. Take off the housing, the thermostat is inside. when you replace the thermostat, be sure it is oriented the same way as the one you removed.
4.7L, follow the lower radiator hose to the engine, it is under that housing.
show pic's of replacing thermostat on dodge durango
Dodge doesn't have a 4.6L
It would, but it is not a good idea.
If the thermostat has failed it will need replaced.
If you question the condition of the thermostat, just replace it, they're cheap enough.
Contrary to every other car and truck that I have worked on, the 2004 Dodge Durango has its thermostat located on the bottom radiator hose. A close inspection of the bottom hose where it connects to the engine will show you the thermostat housing.
The spring side goes into the engine.
No, they are not interchangeable.
On a 5.9L the thermostat is under the housing that the upper radiator hose hooks to on the engine.
The thermostat on a 4.7L is under the housing where the lower radiator hose hooks to the engine.
Usually in a housing located at the engine end of the upper radiator hose I have an 01 Durango with a 4.7 and the thermostat is in the lower radiator hose at the engine end.
99 Durango doesn't have a Heater Control Valve, It only has a thermostat