Upper & Lower Radiator Hoses are Collapsed

[2.5L4C]

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 of coolant, 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.

 

[rusty ol ranger]

Replace the hoses.

They are shot.

 

[Uncle Gump]

A couple things come to mind...

The lower hose shouldn't collapse... it should have and internal spring to prevent that.

Typically when the upper radiator hose is collapsed it would mean the water pump bypass is plugged. The bypass on your truck is the heater core. They plug up.

 

[adsm08]

In addition to the above things, look into one of these:

Robot or human?

They are great for getting air burped out of the cooling system used on Rangers and earlier Explorers without making a big mess.

 

[2.5L4C]

A couple things come to mind...

The lower hose shouldn't collapse... it should have and internal spring to prevent that.

Typically when the upper radiator hose is collapsed it would mean the water pump bypass is plugged. The bypass on your truck is the heater core. They plug up.

The hoses were replaced a couple years ago I believe, and still feel and look new. I thought the same thing about the lower hose with the spring. Strange that it would vacuum collapse. I will look into all of these and report back.

 

[tomw]

Did the thermostat have a 'bleed'? If not, then your cooling jacket could be full of air. The bleed would allow air to pass through the upper hose to the filler, and coolant to fill from the bottom, via the lower radiator hose.
You get collapse when the external air pressure is greater than the internal pressure of the coolant, OR, you get lower hose collapse when the coolant flow from the radiator is less than the water pump wants to imbibe. Having both collapse indicates a lack of coolant in the system. no matter if it is flowing out the filler neck.
tom