I purchased a G5 tower for cheap, on a whim, from my local university surplus store. There was a strange sign that said "may leak". I was really confused as to

I purchased a G5 tower for cheap, on a whim, from my local university surplus store. There was a strange sign that said "may leak". I was really confused as to why they were talking about memory leaks W.R.T. hardware. Only once I got home and opened up the case did I realize that they meant leaking of the liquid cooling system... I have yet to repair the cooling and boot up the system. Any tips/guides for doing so? I ended up using another second-hand Mac Mini G4 for PowerPC testing. Much less hassle but also much slower. LLVM builds take ages.