coolant leak cutlass ciera 3.1ltr

[marsiklassen]

I have a 94 cutlass ciera 3.1ltr that has a coolant leak. its coming from a about a half inch tube in behind the upper rad hose at the back of the engine block. can you please tell me what this is called where it goes and how to replace it, Do i have to take the intake manifold off.

thanks.

[carriedi]

is it the steel tube that comes from the water pump housing along the front of the engine and goes under the air intake tube? Hooks up to heater hose? Can you see it in this picture?

http://en.wikipedia.org/wiki/File:2005_ ... engine.jpg