Third time water pump from my 1996 dodge ram van why would it be leaking again Should I buy the original one and how much does it cost to replace it me bringing the water pump dont know what to do he?

Don't buy the original just find a different auto supply. Advanced Auto Parts and Autozone generally makes a good reman pump. BE SURE TO INSTALL CORRECTLY FOR BEST RESULTS. Black gasket sealant works better than blue on water pumps Check your radiator's quality. If the radiator is corroding, it'll cause the coolant to get too hot and damages the water pump's internal seals. Also make sure you're putting a gasket on with black RTV sealant.