ok what i did is i got a new water pump and i took out the rad and put a hose in one end and shoot it out tho the other to see if everything was flowing tho and it went out with no prob and i put like 3 gollons of coolent in and it still says add coolent but it goes on and off and my reservoir is like blowing and if its not the rad or the water pump what else can it be?

Blown Coolant seals between the irons and the housings. Requires a complete teardown to replace. This is why we have told you to have a PRESSURIZED COOLANT SYSTEM LEAK TEST perofrmed. IT will tell you if you have a coolant system leak, and wiith some detective work it will tell you WHERE. If you end up with water in the combustion chambers its rebuild time/ READ AND HEED!