hi there my friend has a 2003 7700 f150 and the block heater just started leaking i was wondering if anyone might know a common cause for it he never plugs it in in the winter and we live in alberta so it gets quite cold do you think i tried telling him that it will help the engine life and everything if he did so do you think it could be leaking from not using it for any reason that might help me convince him to plug it in. thank you