Air in the Radiator

hi all, I recently got Wcing.. first here are my WCing setup specs:

Swiftech MCW-6002
Eheim 1250
Critcool Clear Vertical res.
D-Tek 120Jr heatercore/ Radiator.
ClearFlex60 tubing
Distilled water with 20:1 Zerex coolant solution.

now the system specs:

P4 2.6Ghz @ 3.2Ghz
Asus P4P800 DLX

Now the question regarding air in the radiator. My setup is running perfectly fine.. idles =25C, Loads = 29-30C, ambients = 23-24C.. I did a fine bleeding/filling job, but I still get air bubbles in my setup.. Currently my Radiator/Pump/Rservoir are lying outside my case, when i try to tilt the Radiator, a suden gush of air comes out of it towards the reservoir? where did this air come from? Is there some point/barb which is lose and needs extra teflon?

This air goes away(I think it collects in the radiator) after few hours.. but comes again once in a while.. what should i do? Redo my reservoir? or fill and bleed the whole setup all over again?

thanks.

Sounds like a leaky inlet on your pump, or res placement issue.

pics???

I don't know if what I do is normal, but when ever I fill up my sys, I pick up the whole PC and tip it upside-down, side-ways and every which-way until I am sure all air is out of the heater core. But check with others as I have no real experience in this matter other than what I do that works for my sys.

If it is a recurring problem, you have to make sure your whole sys is air-tight. I don't mean your res, as that can run with the lid off just fine. But it sounds more like you have air trapped in your radiator with just a little coming out when you mess with it.