Originally Posted by AleXileD
Originally Posted by Maelthras
You have to turn the case a full rotation till the res is at the top of the loop, and then be careful to set it right side up without letting the bubble back through the pump. If you can do this while it's running then that would be best since the water flow will push any bubbles to the res. Then open the res and let the air out as you fill it with more distilled water. You may have to do this a few times but if this doesn't work that means you are somehow pumping air into the loop and a leak would be a very real possibility.
I noticed that when I tilt my case in certain extreme angles (towards upside down) my pump sometimes grabs a bit of air and shoot a stream of bubbles trough my loop...
So it's hard to do this with the pump running ... but i have tried tilting it with the pump off.
Try filling the res up to almost maximum - this should reduce the amount of air available to your pump. As you move bubbles through the loop and they get caught in the res (as it is designed to catch them) the air in the res should build up again, at which point you fill it again, and so on. This procedure should eventually remove all the air from the system. If you still see bubbles after doing this several times, there must be a leak somewhere. Check the seal of the res, does the filler port cap have a rubber o-ring to make it air-tight?