I've replaced the thermostat , water pump , flushed out the radiator , and it still gets hot but the bottom radiator hose stays cool . It has no place on the engine to bleed for air . What am I missing ?

 

Sometimes questions help as much as answers so here goes,
Are you sure it is actually getting hot or could the temp gauge be reporting incorrectly?
When you replaced the thermostat was it installed correctly ( Don't feel slighted , it has been done before).?
Did you compare the water pump to the one removed as far as the impeller direction?
There is always the possibility the radiator is blocked internally.
Don't laugh at this one, but if the belt was installed incorrectly and the water pump is turning in the wrong direction , just touching all the bases.
Has the engine overheated to the point where damage took place? (head gasket)