Man that could be a lot of things.
If it is just pouring out then it could be the water pump (could you tell me what kind of car it is? that matters)
See when the water pump locks up usually there is a water bypass that will drain the water out of the car. A crack will not "pour" coolant.
Can you see where the leak is coming from?
It could just be the hose is broken near a clamp. if this is the case you may only be looking at $10 for a part.
Does it look like the water is leaking from under the engine, or from under the radiator.
Regardless, try the "stop leak" that would seal a small leak pretty good. Though if it is a part failure you are going to have to replace it asap. Running with your car overheating will screw up your head, and can blow your engine.
Okay a blazer.
Okay look at the area around your fan, the fan itself is attached to the water-pump. (unless you have an electric fan then the water pump is at the center of the serpentine belt, but not the lowest component, that is the crank)
Does the water appear to be coming from this area?
Or does it appear to be coming from the radiator?
Is your radiator wet?
You may have to get on the ground and look to see where exactly it is dripping from.
This post was edited on 4/13 at 10:47 pm