I have a 2016 f150 5.0 with 78,000 miles and It recently started overheating and both radiator hoses collapse when cooilng down. After numerous Google searches I have changed both the radiator cap and thermostat and its still doing it. I am at a loss so any advice of where to go next would be appreciated.

 

Is the radiator overflow hose clear? If it's clogged, coolant cannot return to the radiator during cooldown and that can cause the hoses to collapse. I'm assuming you have the anti-collapse "spring" inside the lower hose, right?

- Jack

 

no the lower hose did it also but today itodaynt flat when the top was

 

If the lower hose collapses, it MUST be missing the "spring" insert that is there to prevent it from collapsing. If your upper hose is collapsing, there is a vacuum in the cooling system. This suggests a faulty radiator cap that is not permitting the coolant to return from the overflow tank or, the hose from the overflow tank is blocked. There's not much else that can form a vacuum in the cooling system.

- Jack