radiator?

[AnthonyF]

if u have no heat, typically a sticking thermostat. if that isnt it, run ur car and pop the hood. When the fan turns on, feel the air being pulled through. See if it is warm or cold. That will determine if the radiator is bad or not. try those 2 first.

[redciv1]

Please pardon the threadjack, but I wanted to know if the air is cool blowing from the fans then what does that mean. My car overheats with a new thermostat, rad cap, fans wired on at switch. From a dead cold and both fans running the car overheats in about 5 minutes. I shut it down before it goes to the red section. What I wanted to know is that I drained the radiator and ran water thru the radiator with a nozzle on the hose for pressure. How fast should the water flow? I was thinking that maybe the radiator could have enough calcium buildup(looks like previous owner may have ran water thru the radiator, because I could see calcium deposits thru the rad cap)
Also, if I drained the radiator and pulled it from the car and then start up the car should the water pump push the remaining coolant from the upper and lower radiator hose locations, or is there not enough pressure in the system for the water pump to move the coolant in the system.