I have a 98 ranger and need some help. I recently had too replace the radiator. Seems like everything is going to be good. But when I take it for a test drive it isn't. So the gauge didn't show it's running hot but I can hear the antifreeze bubbling. The overflow is still at level. So I've replaced the thermostat and got a new radiator cap. Drove it around the block again. And the same thing but now the antifreeze is pouring out. I can see where it's coming from but I'm not sure of what I'm looking at. I'm thinking it's the water pump. Any ideas?