If the hose is leaking buy a new one the "release valve" may be the drain for the system that is usually located on the opposing side of the radiator from the lower hose connection open the main radiator cap slowly before doing this you may get as much as 1.5 gallons maybe less if there was a leak
You do not have one. Disconect the lower radiator hose. (after cold)
It is beneath the lower radiator hose on the radiator.
It is beneath the lower radiator hose.
In the 1994 Corsica 3.1 Litre the radiator hoses ar at the lower RH end and the upper LH end of the radiator as viewed from the driver's seat.
Just below the lower radiator hose.
It is on the bottom of the radiator below the lower hose.
It is located just below the lower radiator hose.
It is located just below the lower radiator hose.
It is located just below the lower radiator hose.
It is just below the lower radiator hose.
If it is not on the bottom of the radiator, then just remove the lower radiator hose to drain the system.
The cooling system on these vehicles is drained by detaching the lower radiator hose from the radiator. The radiator doesn't have a drain plug.