ok so it seems that these trucks are great for over heating but i havn't found a fourm that comes with the solution if their is one so far i replaced the t-stat, water pump, and radiator. clutch fan is good and so is heater core what else should i replace. It runs at 3/4 or higher on the highway a little cooler through town. I have delt with head gaskets before and this has been an issu for a while so i think if that was the problems i would have completly blown them by now. any advice would be help full my next sept my be to just try and trade it in.

 

A little info would be helpful such as what engine is in the truck, model year, etc...

 

oh crap duh 04 ram 1500 4.7 sry late night post

 

If you have replaced the stat, water pump and radiator, the next step is the head gaskets/cracked/warped heads. The heater core will just keep you from getting heat if it wasnt working. It wont cause it to overheat as the main circulation system isnt involved in the heater core.

 

These (and most vehicles today) use an aluminum and plastic radiator and realistic life expectancy is usually 8-10 years. They tend to work very well until about that age - but then they tend to degrade pretty rapidly.

If the radiator isn't clogged yet, then you may want to check your upper and lower hoses. Most people don't ever think to change the hose - even with a radiator replacement. The heat passing through these hoses causes the walls to thin out over time and they will begin to constrict and inhibit the flow of coolant. You can usually tell by squeezing the hoses with the engine running.

If the 4.7 has an Achilles Heel it's that those aluminum heads do not fare well from over-heating - and it doesn't take much of an overheat to lose the head gasket, have those soft aluminum heads warp or expand just enough to drop a valve seat (I know this one personally - as I'm currently rebuilding the 4.7 in my Jeep).

Take care of this problem before the engine takes a sh*t on you!!!

 

I replaced my hoses t stat and radiator. Because it was over heating which I am pretty sure just led too my dropping a valve seat. Strange thing is it only got hot once and then 1 month later it dropped a valve.

So if I was you replace it all before you have to spend 3200 like I just had too.

And listen to Hammer he was dead on about everything but I didnt listen lol

 

Try coolant temp sensor seems you got all of the cooling system done besides that, after that then you may have bigger issues.