Are you replacing the line or the radiator? If the line is being replaced, cut it off with an air cutoff tool, then use a deep six-point socket on that soft brass nut. Flare nut wrenches are made for those nuts too, often called "line wrenches". If you used an open end wrench you'd have been real lucky to get the nut loose without rounding it off.
As for rubber hose, pressures can get as high as 15 pounds if that is a transmission cooler line so regular fuel hose won't cut it. Use fuel injection hose and the special band-type clamps which will withstand much higher pressures. You also have to prepare the metal hose ends so the rubber hose won't push off. Simply clamping a rubber hose to a smooth metal pipe is not sufficient.
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Thursday, September 20th, 2012 AT 10:20 PM