Ok I changed my waterpump it was bad but since I've changed the waterpump my coolant Reservoir is bubbling like crazy and the truck gets extremely hot to where its steaming out the overflow tube and I don't understand why its bubbling or overheating because it wasn't before I replaced the water pump i checked my thermostat its opening fine jiggler is on top also the heater never blows hot air even when the truck is warmed up or overheating and one other thing is on my old waterpump the weeping hole (i think thats what its called) is on the bottom of the pump and on the new one its on top dose that matter at all? Any advice would be greatly appreciated i know I have alot of work to do on this truck it was my fiance's grandpas truck he had given it to her before he passed 2 years ago so its very sentimental to us to keep it going thanks again hope to hear back from anyone with advice