Looking at post #2, install a clamp as Woody says on the RED return line to the LEFT of the little YELLOW hose.

Then tighten the clamp to restrict flow(increase pressure) coming from the IC. (this forces the more water and the air through the yellow line into the surge tank)

Run engine, or drive mildly, for maybe 10 - 15 minutes. If you were to install a clear line in place of the yellow line you would be able to see the air passing and be able to tell when it is just water.

Have fun....

Edit: DONT forget to release the clamp when your done...