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Ive always left the cap of the header tank whilst the engine is running for a bit with the heater on full speed on hot. It circulates all the water and lets the air out the top.
Fords dont have the bleed screw like some other makes as far as i know
The small hose from the thermostat housing takes air to teh expansion tank, and the cap will went air both ways even when closed after a threshold pressure.