2001 Ram 2500 V8. I have this issue where when sitting still you have lukewarm heat and when the truck gets moving it gets warm. Now I thought I had a leak because when you shut it off you smell coolant when you go to the front of the truck. But I can't find it and my coolant level hasn't gone down.

I'm looking for any ideas here. Because I ran out. Thermostat is new and I don't believe it's stuck open. All the hoses are new.

 

Generally that's a a result of being low on coolant... but, if that's not the case, then my other WAG would be an air pocket in the heater core.

 

You have air trapped! Read post 14...
https://dodgeforum.com/forum/2nd-gen...p-bleed-2.html
The air will slowly work it's way out the more you drive it.

 

That's what I thought but I jacked the front end up and have taken it on long trips. I'll see what happens here soon. Hopefully I'll get her before winter.

 

That dang heater core but I did jack the front up

 

My thermostat came with the valve already on it. I might do the flush T way but what does it look like?

 

Mine is the same way. Under normal circumstances, heat is marginal, at best. On a long drive though, it eventually gets to the point where it will cook you out of the cab. Which is the way it SHOULD work all the time..... My theory is, the heater core is the highest point in the cooling system, so, getting all the air out of it is a major pain. If you install the flush T in the heater core outlet hose..... as close to the heater core as you can manage, just start the engine, crack open the flush T, and it will bleed all the air out of the system. Should be able to just close it up then, and be down the road, with good heat, all the time. (assuming the engine is warm. ) Give it a shot, see what happens, and let us know. I wanna do the same on my truck, but, with the V-10, I can't even SEE the heater core hoses at the firewall....

 

Well here is what I found (thanks to my mom for sitting in the cab being a stick and the e brake hitting the frame it rolls). The inlet hose to the core is hot as hell the outlet is cold. Not ice cold but cold. I also noticed the metal tube is leaking (my fault the o trying was trashed). So I might as well do the Flush T while I'm in there. What am I looking for? Aren't the heater hoses 5/8s? So if I get a brass T with 5/8s nipples and a threaded part I should be able to thread the radiator pitcock into it right?

 

What I'm going to do is go to Lowes and see if I can find a brass T that either has 5/8 barbs on it or one where I can screw ones on and put a petcock on the bottom so I can just turn that to burn the air. I'm going to try to do all that today. I don't know if it will work with my body lift because the hoses go down towards the motor.

 

Do you know what brand? Part #? I have heard that they are out there but still haven't proved it. Keep in mind you need to get the rpm's up high enough to flush out the air. Putting it in drive and not going past 2K won't cut it.