Originally Posted by stevebfl

Yea, that is exactly what I would do.

If that didn't solve it I would put a pressure tester on the radiator and open the return line from the core. I would plug the engine side and I would pump the system and see what came out (the valve should be open if the key is off). You might be able to do this without the pressure tester by just reving the motor with the engine side off and something to collect the flow. Doing it that way of course empties the system rather tahn bleeding as the pressure tool woul allow.