I just just replaced my radiator, thermostat housing, both ECT sensors, and thermostat, which all had some leaks.


After putting it all back together, I filled the new radiator up with slightly more than 1 gallon, which I was expecting at least 2. I left the cap off to let it breath a little while running the engine. It spewed on me (fun clean up), but the level didn't go down. So I capped it off.

After running the engine to temp, I got out to check on everything and noticed that both my upper and lower radiator hoses were collapsed. This is not a problem that I had before the new radiator.


Would this just be from air not working it's way out? Or have I done something wrong?

Any help is greatly appreciated.

 

I don't really know the best answer, but to me I would replace the hoses with new ones.

Then address the problem from the beginning, fill the radiator (do not over fill) and overflow tank to the mark, start the truck, heat it up, and see where it goes.

Too bad you didn't replace the Hoses when you replaced all of the other parts, would have saved time.

Once the engine is HOT do not remove the radiator caps without caution.

 

After it burped , u should’ve waited to put cap back on... u need to burp the system again this time adding the other gallon of coolant, and don’t forget to fill the overflow tank....

 

Reburping system now. I noticed my heater valve has a broken vacuum line that is not present. Does anyone know where that line goes?

 

Replace radiator cap and check overflow hose and tank if radiator hoses looked collapsed

Radiator cap has TWO valves
Larger one lets coolant flow OUT to overflow tank when coolant gets hot and expands
Smaller one lets coolant flow back IN as coolant in engine/rad cools down and shrinks, so it equalizes pressure

Collapsed hoses means air pressure on the outside of the hoses(15psi at sea level) is more than on the inside and that should never happen



At the edge of passenger side fire wall there will be TWO vacuum lines coming out, hard plastic lines, one is black the other is grey
Black one goes to the Vacuum Reservoir "ball", it supplies vacuum to the Cab Vent direction control
Grey one goes to the Heater Hose by-pass valve, the broken one on yours

The Grey one is only used for MAX AC, only has vacuum when MAX AC is selected in the cab, so not a vacuum leak per say

 

Good to know! Thanks for the info RonD!