Thanks, that may be my problem. I had the Rad cap on tight as I had read how important it was to have the system under pressure. Bentley is ambiguous and other sites had said to tighten cap. I will try again in the morning.
Very little coolant was lost from the expansion tank and steam would escape from the bleed screw. Was the rad cap on preventing the flow of coolant to the bleed screw? I also thought that the coolant would pour out of the expansion tank since it is under pressure.