Radiator Hoses Collapsing ISX Prostar

Might be new but Is it the correct type of hose? Hoses come in different types. The only times Ive seen this is when hose is old and weakened and collapses from the inside or wrong type of hose is used. On most cars they used to use a hose with a wire inside to prevent the hose from collapsing.

Ive seen people try to save a buck and not buy the correct hose and just cut off a piece from a roll thinking any hose will do.

 

Have you tried a new cap for reservoir? Someone told me ISX need that yearly.

 

Seems you got abit of a vacuum. Sometimes it could be something as simple as needing a new radiator cap.

 

Check the hose for any blockage to the coolant reservoir, and replace cap.

 

If the hose returned to shape after you removed the cap, the cap is defective and not venting.

 

you may have an air lock (Bubble) in the cooling system.

let the engine cool down over night (if you can)

have jugs of coolant/distilled water mix ready.

start engine, turn on either the heater or defroster to HOT, high idle the engine. little by little add coolant as the level drops in the radiator. this may take some time, air bubbles do not quickly circulate thru the system.

you may have to loosen a radiator or heater core hose a bit, just enough to allow "some coolant" to run out in effect "bleeding" the system, then retighten the hose clamp. you might even have a "bleeder screw" in the line someplace or on top of the thermostate housing, check for one, open it up slightly till "some" coolant runs out.

that air lock/bubble is causing that hose to collapse as the system is trying to suck up coolant, but is sucking up air in that bubble instead.

air travels to the top to be released into the atmosphere, on 4 wheelers, what is done sometimes is to jack up the front end to make a "high point" for the air to escape, rather than the vehicle being on level ground.

it is affecting the idle, cuz there is no water/coolantr flow, as that bubble is preventing it from doing so. once that bubble is bled out, the sensors will settle back down and the idel will imporve.