While trying to track down the source of a small amount of coolant in my bilge, I noticed that the hose from my coolant recovery tank had no hose clamp at the engine end. There is corrosion around the fill cap so this leakage has been happening for some time. When I tried to seat the hose on the fitting and apply a clamp the fitting separated from the neck of the pressure cap/coolant fill. Any suggestions for a repair?