Originally Posted by huckincharlie
Dunno what your fill port looks like, but if you have a cut off valve attach it to the top of your fill port. next fill your funnel with coolant while the pump is running and open that cut-off valve.
It will probably suck in some of the extra water that's in the funnel, that's fine. leave the valve open for a while and let the loop run. BE SURE TO CLOSE THE CUT OFF VALVE BEFORE YOU SHUT OFF THE PUMP
If you don't, your funnel will do it's best impression of a whale and spray water straight up into the air and all over the place.
After a few hours of running open. close the valve, and turn the pump off. SLOWLY
open the valve until you hear some noise, then quickly close it. repeat until no more noise is heard when you open the valve.
Now close it all off.
repeat as necessary.
Like someone said earlier, your reservoir is too small or your pump is set too strong, one of the two because the pump is pulling hard enough to overcome the rise of the bubbles.
What the method I described above does is make the funnel effectively part of the reservoir and lets the loop over-fill itself. the extra pressure helps force out the air. Once the extra pressure to remove the air is no longer needed, you will be able to release the extra pressure without allowing any air back into the loop.