Bad radiator cap, blockage, new stat is bad, bad coolant temp sensor, fans not working, air pocket in system, worn blades on waterpump, inadequete mixture of coolant and water. Two other things to check....There is a temperature sensor next to the thermostat. They cost about 12 bucks, a standard item, and they are known to degrade in performance over time. Mind you, everything on a fuel injected engine is controlled by a computer module and sensors, the computer adjusting parameters according to readings it gets from the sensors. A bad cooling sensor would not tell the computer to send current to the cooling fan on the radiator. The second thing to check is your radiator itself. Corrosion will build up on the aluminum vents inside, and prevent flow of coolant, and even though your water pump is pumping, the flow is restricted (depending on the antifreeze mix you use), and the solution to that is to have it flushed out. They sell bottles of stuff that you add to your radiator to clean it, or you have it professionally done. To have your radiator flushed insures it is clean, and insures you have the PROPER mix of antifreeze. Too often, shops use the 50/50 mix of antifreeze, and common knowledge dictates that bigger 8 cylinder engines need a richer mixture, like 70/30, especially during the summer. Hot water has way much more pressure than hot antifreeze, and the friction of the mostly water mix could be relative to the "running hot" condition. so, 1st.....Run a richer mix of antifreeze, drive it and see the temperature change. 2nd.....Have the temperature sensor changed. 3rd.....Flush and clean the radiator. Betcha nothing your mixture of antifreeze is too thin to handle this hot weather. Hope it helps. Peace.
If you question the condition of the thermostat, just replace it, they're cheap enough.
show pic's of replacing thermostat on dodge durango
you shouldn't just follow your coolant hose
located at the end of the upper radiator hose. remove two bolts, replace with new parts remember to replace the gasket.
broken thermostat; blocked hose to radiator or hole in hose; leak in radiator; etc..
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 your vehicle keeps overheating, you should flush the cooling system, replace the coolant, and replace the thermostat. In fact, you should have done that before this.
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.
How to replace the inside Spectra Heater Core on a 2000 dodge durango??
The spring side goes into the engine.