Check the hose and see if it's real soft or even tacky feeling first. If it runs for a few minutes then collapses it's doing it when the thermostat opens. If it does it right when the engine starts cold the thermostat could be stuck open.
It could be caused by just the hose(some had a spring inside to keep them from collapsing) or any combination of the hose, thermostat, radiator and cap.
Is the cooling fan running? If so, drain the radiator with the heater control set to hot. Install a new thermostat, and fill the system with a 50/50 mix of antifreeze and distilled water. Bleed all air from the system by using bleeder screws if equipped, and by starting the engine with the radiator cap off radiator full. Watch for escaping air bubbles and keep the radiator full. When you see no more air escaping put the cap back on. If the fan is not running then that is your problem. Turn the A/C on and the fan should run continuously. If it does not the fan motor is more than likely bad. Check the fuse for the fan. If it is good, Apply 12 volts directly to the fan motor to check it. If it runs then replace the thermal relay.
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