1996 Ford Aerostar 3 litre aerostar overheats

i just flushed the cooling system and changed the radiator cap and thermostadt but my 96 3litre aerostar is still over heating. The water is circulating. I removed the radiator cap and waited to see if the water apeared to be circulating after the themostadt opened up and it seemed too be moved freely. I dont see any obvious signs of a bad or blown head gasket i.e. "no chocolate milk in the dipstick or in the radiator and no water or smoke coming from the tail pipe.I dont see any obvious signs of a bad water pump either