With the car cold, open the rad cap, start car and let the car idle till the fans come on (may take a while), then open the bleeder screw on top of the thermostat housing until a solid stream of coolant comes out. Then shut the screw, top off the rad,and cap it.

If your having a heat problem, take the hoses for the core off the engine and flush/fill the core. bleeding the engine wont help get the heat back.