Either it is working right and i am losing my mind or it is the water pump. When your car is up to operating temp is the upper radiator hose under pressure and what would happen if you took the radiator cap off? On mine it is never under pressure and i can take the cap off any time without spilling a drop. I even bought a new cap and used that... same thing. you can run it for hours and it never overheats and never fills the overflow. i did pressure check the cooling system a while back before i got it running and it held pressure fine. someone enlighten me before i rip off this water pump!