I thought this topic deserved it's own thread since there seems to be a lot of confusion regarding this.

Pre 1994 Integras DO NOT have an air bleed valve for the cooling system. It is not on the thermo housing, you do not follow the top rad hose to find it there either. There is none, period. Some people have mistaken the drain bolt on the block as a bleed valve, as the name implies, it only allows coolant to drain out of the block. If you attempt to unloosen the bolt to bleed the system, coolant will come gushing out.