Most have them on the lower hose...the problem is finding a hose at the parts store (or even the Ford dealership) that are sold with the internal spring anymore. Been there done that...

 

Go with the Home Depot syndrome, go to your local pep boys, autozone, etc or wherever, buy lower hose take spring out return and tell them it doesnt fit or some other excuse.

 

That's the problem, the new ones don't come with springs. I always reuse my old springs.

 

Me too.

 

Is it collapsed when the engine is hot or after it cools down?

Try replacing your radiator cap. I would think that because you are getting a vacuum in the system it might mean that the radiator cap is not opening and/or closing at the right time.

Just a guess, I've never had this happen.

 

The top radiator hose does not require a spiral spring because it is a pressure hose; the bottom hose is under vacuum and must have the spring to prevent collapsing.

I always remove the spring from the old bottom hose and insert it in the new bottom hose.