1989 Chevy Truck possible water pump

On cold starts my trk starts normally, when the engine begins to warm up I begin to hear a metal on metal noise [like a clicking&grinding] slowly gets loud.
as it warms up and begins to make noise it starts to leak coolant around the upper radiator hose connection. No oil in the water, throttles up strong and smooth, plenty of power on the road, not using much oil. Water pump itself is not leaking though.
does this sound like it could be a water pump?
thank you