I did a liquid submerged computer once. It was a server for my friends and I. A very good learning experience, but something i would never do again. Its completely pointless aside from being something different, if u do have any questions though i would love to answer them.
Youtube is down for me, but i hope u have some sort of radiator for whatever liquid (mineral oil im presuming) ur using because passively the oil will easily reach 130*f on semi-lowend hardware. Add a respectable video card into the mix and your better off using the stock air cooler on ur cpu