I've been trying to make sure I don't still have any air in the system. When I run the engine with the coolant cap removed, the coolant level gets higher and higher until it gets near the top of the tank and I then turn the engine off before it overflows. Instructions I have seen say it should go down as air is removed. The coolant remains high until I bleed the radiator which drops the level to where it should be. Is this normal or does it mean there is a blockage or something with the radiator??? Instead of removed air, I seem to be introducing it? Could such a blockage have cause the overheating, resulting in a loose cap?

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