Coolant not being drawn back into the radiator. HELP

[bobh13908]

I'm having a problem with my car not drawing the coolant back into the radiator after being pushed into the overflow bottle. Just wondering if anyone knew what was causing this. I took the overflow bottle and coolant line that runs back to the radiator off and cleaned them out. It will warm up just fine, get to 210 degrees and then sit there, once it cools down the low coolant light comes on and I have to take the cap off and pump it back into the radiator. Anyone know what could be causing this??

[2002ssslp]

Your waterpump may be on it's way out. They sometimes will lose fins on the inside of the pump. It is a good idea to change your coolant every three years with the factory Dexcool, what have you been using and how often is it changed ?

[89RS&98Z28]

How old is the cap? If its old try changing it first.

[bobh13908]

cap is original and i just flushed out the radiator this summer, i pulled the water pump off to replace the gaskets a few weeks ago and the water pump looked fine so i dont think it's going out.

[Canadian LS1]

i second the motion....try a rad cap

[cammed goat]

If any of your hoses are collapsed while the engine isn't running, then your radiator cap is faulty.