I have learned alot on this forum and im relying on you pros to teach me some more. I bought a used oil cooler (first mistake) and when I recieved it, it appeared to have water inside. The previous owner confirmed that he flushed it with water. :3d_frown: I need some advice on how to get all of it out. I dont want ANY moisture in my fresh build! I have tried shooting compressed air in there and nothing came out at first. But then I got quite a bit out, but when you look down in it you can still see moisture. My concern in getting it all out and how will I do that, when I assume there are alot of small passages in there that could be contaminated. I would assume it would have to be filled completely with some kind of cleaner and would probably be best under pressure or flushed somehow. Im not sure what is best to used w/o being in the same boat after im done. This is all I found in my search: http://www.supramania.com/forums/showthread.php?t=31213&highlight=water+oil+cooler Any other recommendations would be greatly appreciated. Thanksssss!!!!