Well that's definitely a problem...though the fact that a large bubble was able to collect in the rad makes me question its design..how do you have it mounted? I would still recommend getting more rad space (either another rad or replace the existing with a bigger one), but at least your CPU temps seem to be ok now. Granted, that's about the temps I got on my Q9450 with the stock cooler, but they're not dangerous at all, just makes the liquid cooling seem a bit superfluous. What temps is your GPU getting?