"Copper water blocks and aluminum radiators will cause corrosion."
distilled water will not allow mineral build up in a system and the "Blockage" you speak of would be irradiated as far a s minerals go. with a 50/50 mix coolant to distilled water mix, if corrosion is your worry, modern coolant has inhibitors to keep corrosion from occurring from the electrolysis which is very minimal on a system as small as a PC system anyway. i don't know if your aware of this, but copper/aluminum hybrid radiators have been around since water cooling engines came out. water cooling a computer is no different from water cooling a car. are you aware that most pumps (even the good ones) utilize steel shaft? they guy above has the right idea. instead of a radiator, he is looking for a transmission/oil/power steering cooler (all the same, different size options). I actually built a water cooling system for a friend 4 or 5 years ago and the coolant in it is still yellow as it came new (used universal coolant). coolant has a 5 year life if mixed properly with distilled water ONLY. no build up, no cooling problems. oh, and it also cools better than any aftermarket kit for a pc he has bought. lol, he keeps wanting to buy a more compact version but they don't cool as well. and i made it universal, this is the 5th or 6th computer he has put this system on. he has never had cooling issues, even when overclocking (conservatively, not overkill overclocking)
Materials used - mind you when i built this, water cooling had barely come out, if not, it was close to being released on the market. a can't really remember the specifics, but anyway, there weren't any aftermarket pieces that you could buy separately bcck then, so i made them.
brass 90 degree gas fitting ( they have a big square side that you must finish out smooth and perfectly flat. this is the heat sink), it was like a 1.5ish inch square. being a gas fitting, you can adapt hose connectors to it
submergeable pump for an aquarium (its been a long time, i forgot the gpm, but its very little. high gpm is not a good idea if the rest of the system is not suitable for it. the coolant won't stay in the "radiator long enough and it will cause overheating")
3/8 clear line
pvc reservoir with clear top and filler cap
automatic transmission cooler from a ford explorer (go to the junk yard 5 bucks) it has a different design than a normal tube and fin cooler and cools much more efficiently. look up B&M SuperCooler Oil Coolers, its just like those.
3 speed house fan (the small ones, like 8 or 9 inches. i can't really remember the size i used) i used a three speed as a quiet function for low performance instances like homework on microsoft word. the two higher speeds were for increased cpu output (like with gaming)
Red RTV Silicone (high temp silicone for coolant seal assistance on cars) use this on every connection (conservatively, it doesn't take much)
50/50 universal to distilled water coolant (never EVER use tap water. it is what causes blockage, as there is an organic additive that basically dies, if you will, and builds up when tap water is added. this is due to chlorine in water. only a thimble size of tap water is enough to destroy a cars organic additive. universal can accept tap water due to chlorine suppressants, but it hinders its life big time because it can't attach to 100% of chlorine before the chlorine gets to the organic additive. you are better off using distilled water. green coolant has a chemical additive in it, but it clogs stuff up when tap water is added too, so i wouldn't use that either. these additives are around to attach to small amounts of contaminant not controllable unless you are in a clean room. but they are not meant to take care of the huge amount of contaminants in tap water. if they are, they don't last very long at all.
im just trying to educate people on stuff like this so they can go and build stuff like this and build it right. since most people don't know some of the intricate stuff, they blame it on something other than the real problem. and i know this is an old post, but maybe someone will read this and get a better glimpse on how this stuff works.
"were all noobs at one point or another" <- that was really conceited and uncalled for mr. five years
don't bother replying i'm about to go to work and ill forget where the hell this site is anyway.