Steam Coming Intake Manifold, Coolant Loss, Overheating?? SOHC KA24

[feooo]

Exactly as the title says. I've got a SOHC KA that just recently overheating.
I'm pretty sure steam is coming out from where the intake manifold meats the block, but I dont know for sure.
The night it overheated and started steaming I burnt through all my coolant. Steam smells strongly of coolant too.
When I shut it off after its been steaming it makes a long consistent hissing sound; again coming from the intake side of the motor.
Any ideas as to what this could be? Coolant line leak? Headgasket?

[rcdad123]

check all of the hoses on the intake side, including the heater hoses

[fliprayzin240sx]

One of your lines under the manifold got a hole on it...hope you didnt fuck the engine up when it overheated.

[Chaluska]

heater hose for sure.. i just had to replace all of mine.

[beeboyee]

had this same problem....
what kinda damage can be done to the motor?

[feooo]

What ended up being wrong with yours?