coolant not going into radiator
My '97 bmw 528i was overheating so i replaced: waterpump, fan clutch, and thermostat. I also removed all coolant prior to reassembly. Upon refilling coolant into the overflow reservoir it took less than one gallon. I followed directions in Bentley manual for adding coolant and was unable to get the coolant level to go down into the radiator.
The top radiator hose is warm, and the bottom hose is cold; after running the engine less than 5 minutes the engine overheated and heater is blowing out cool air. Seems like coolant is not getting into the radiator...any ideas??