Ok where to start? First off I'm new here and want to thank in advance for any help I receive. Here we go. It started with the rad hose bursting. Lost all fluid. Changed the hose. Now there is no heat in the cab and the truck stays at 195 degrees at idle and when driving through the city it raise alittle but go back down. On the highway it'll go up to about 230 when on the gas but go back down when I let off the gas. So here's what's been done so far. I installed a new water pump about four months ago. A new thermostat a couple days ago thinking it might be the problem. Opened up both bleeders and have coolant in both. Fan does run. Serpentine belt is tight. And a new rad cap as of today. No water in oil or oil in water. I opened the lines to the heater core and one line was completely full the other had some air but when tilted coolant came out so that lead me to believe it was just a small air bubble. Filled as best I could and closed the line back up. Ran the truck to temp with rad cap open and when the therm opened up it just raises the level and spills out. There is some bubbles the come out but not enough to bring down the level to add more. I'm lost. Idk what else to look at or where to go from here.

 

I forgot that after the tstat change it got worse it's running hotter in the city and forget goin on the highway now.

 

what year is your rango, what engine? possibly a clogged / partially clogged radiator. use an infra red thermometer on the front of the radiator when the engine is warmed up, it should go hottest near the inlet hose (top hose), and gradually cooler as you get to the return line (bottom hose). as for the cab heat, have you flushed the heater core?

 

Sorry I was so worried about covering everything I did that I forgot the important stuff lol. 2000 dodge Durango sport 4.7l. In other words the money bag of the Durango world lol. But I still love old stella.

 

And yes heater core was flushed today and still no heat.

 

does it blow air out of any of the vents? ie does it not blow air out of some but does blow air out of others?

 

Blower still runs out all the vents. This is probably the most baffeling thing I've came across since I bought this 5 years ago.

 

ok, not to sound like a *****, just to cover all grounds, do you have the temp sliders all the way to the right for heat?

 

Yes it is

 

when it was warmed up, was one heater core hose hot and the other warm/ hot? or was one still cold?