My 2003 dodge durango keeps overheating , i just had new radiator put in and it started overheating again but now it is overheating with a very loud screeching noise like a belt sound what could be ca

If the radiator is spraying coolant from the fin area, you should either have it recored, or replace it. Generally, it is not practical to repair a radiator core that is leaking due to corrosion - it will soon spring a leak from some other spot. (recoring: remove the pans and put them on a new core). Rock Auto sells new radiators ranging in price from $95.79 to $250.89. The same radiator is used for both engine models, and also in the Dodge Dakota from the same year.

Cooling system corrosion is the result of failing to change the coolant when specified, or of using tap water with a high ionic content (this is especially a problem in the Southwest US). Skimping on the anti-freeze also leads to corrosion; anti-freeze contains corrosion inhibiting compounds, and it raises the boiling temperature of the coolant so it can perform its function over a wider range of conditions (liquid can remove more heat per volume unit than steam). Keeping the system properly pressurized (leak-free) also raises the boiling point. If your tap water is problematic, use deionized water (the water from a household dehumidifier is excellent if the dehumidifier is reasonably clean).

If you must add coolant to an overheated engine, do so slowly, while the engine is running to minimize thermal shock to the system. You want to cool the engine down evenly to avoid cracking anything. Keeping the engine running circulates the coolant to prevent sudden cold spots. It also helps to prevent bearing seizure - see the next paragraph. Add your coolant to the overflow tank first - it is dangerous to remove the radiator cap on an overheated engine.

Continually overheating the engine will damage it - the oil breaks down and turns to varnish in the bearings, and there is a possibility of cracking the block or a head from thermal stresses beyond design limits. Check the quality of your engine oil right away to see if it is breaking down; if so, change it.
RockAuto Parts Catalog

Thermostat ? Radiator fan ? Blockage in radiator ? Leaking head gasket ?
What are the symptoms ?

Check your head gasket

water pump impeller needs replacing

sounds like you may have a bad head gasket now. i would check the compession and go from there. let us know how the compression is.

if it has the 4.7L engine they crack cylinder heads and the compression from the engine put air into the cooling system you can buy a tester that you hook up to the cooling system that changes color with exhaust fumes auto parts stores can get it or stock try napa

Did he flush the radiator? If not kindly ask him to flush the radiator and then refill it again.

ECT wont kill the engine. If it over heated and you kept driving it. You just might have blown the engine. Put a socket on the balancer bolt and see if you can turn the engine by hand. Clock wise.

Hello rmstrope and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 2000 Dodge Durango, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link:
How to diagnose your overheating Dodge Durango

Get more great, money saving, tips and tricks about your vehicle from: twitter.com/acoates23234

Thanks for the vote, and good luck!

two probably thing , you have a pluged radiator or the fan clush is not good, if when you are cruising it doesn' t overheating , but when you stop for 2-5 minuts it does, then is the fan clush, if when cruising it overheating then is the radiator . all this thinking that you checked the cooland level and changed the termostat with the correct oness