How can I check If my Radiator is working On my 1997 Ford F150?

Buddy

New member
I already change my Fan Clutch,Thermostat and It over heats after driving the truck in warm conditions with the ac on but as soon as i turn the ac off the it cools down.
 
turn on the car and hold the upper hose that goes to the radiator. then have someone give it a little gas. if the hose gets hard the radiator is bad.
 
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