my 2005 4.7L dodge dakota overheats idling and driving at any speed.replaced water pump, thermostat, radiator and cap, fan clutch, head gaskets, flushed, bled and still overheats. anybody?

 

Any leaks? How many miles?

 

no leaks, 175000 miles

 

Anything blocking airflow? I've seen a radiator caked with mud that acted this way. Was the cooling system serviced at 100,000?

 

I'm wondering if the core is full of sediment. If the antifreeze wasn't changed every 4 to 5 years or so, sediment from electrolysis might be closing the tubes up.

 

thanks, nothing blocking the airflow but, the radiator might be an issue. i installed a new radiator about 3 years ago but the truck sat idle for almost a year with coolant in the radiator. prior to sitting idle it didn't overheat. the radiator flush came out clean with a good flow but, could the coolant have hardened and be causing a circulation problem. if so i couldn't tell by flushing it. i'm gonna check it out. thanks again

 

Did you use the correct HOAT coolant? Mixing can cause gelling that will clog the system.

 

thanks, i used premixed prestone antifreeze/coolant. do you think because the truck sat idle for almost a year (unexpected health problems) with coolant in the radiator could cause a problem?. isn't recommended to drain the radiator if it's going to sit idle for a long period of time?

 

Isn't the Prestone green? Only asking cuz the stock stuff is orange. And as mentioned, mixing: Bad.

Also thinking flow issues. How's the routing of the hoses? The lower hose was an absolute bear for me.

 

Have you checked the air filter? Sounds crazy but I had a similar problem. One day the truck just started to over heat for no reason at all. I recalled the only thing I had done was bang out the air filter.I still had several hundred kms to go on my trip, so I pulled into a crappytire store and bought a new air filter. Popped in the new filter in and over heat issue was gone.