i took out my TW Water temperature sensor and i had water come out everywhere as expected. i know i need to add some more coolant, but there will be air in the lines is this a problem in cooling system? how do i get my car operating again once i put the new sensor back in?

do i add water directly to the radiator and then what?

 

fill the radiator with coolant
turn on the engine
watch bubles come up
and
fill when its needed

takes about 10-15min

 

do i leave the radiator cap off? while looknig for bubbles? or do i close the cap and opent he bleeder, OR do i just add to the overflow resevoir?

 

Yes leave the radiator cap off and let it warm up to normal temperature then close it