I was having issues with overheating and leaking out of the weep hole on my water pump so i replaced a few things. I replaced the water pump along with thermostat. Before I did all of this the engine had overheated but doesnt show any bad signs while driving around afterwards. But Once it gets to the point where the thermostat should open it just keeps over heating. But when I put my hand on the lower radiator hose it cold as where my upper is too hot to touch. Any ideas?