[Fixittt]

Ok, fist off....... #1 problem.... your using tap water, I know this because your hoses turned white.

Use distilled water.

#2. Remove your MB from the case. mount the water block on the board, Using your current bolt config, U did have that right. I would also replaces anything that is nylon with metal. Bolts, nuts ect. except for the washers. Dont use metal washers. with the water block mounted to the board (outside of the case) Get a machinists ruler (about $2 at harbor freight, or any whole sale tool co.) and measure the distance from the top of the block, to the board. make sure each corner is the same height. If this cant be done. hold the board up to a bright light, and try to look under the block, U should see ZERO light where the core touches the block. and try to visually inspect the gap between the block and CPU. see if they are even. Also a shim wouldnt hurt.

Make sure your AS is very very thin.

Another thing I would do, is... if i am understnading right, I have your pump on the floor, and the computer on a desk. So its safe to say that your pump is pumping about 3 feet upwards. try to move every thing to the top of the desk at least. as to get some of your flow rate back. Try to have the res directly over the pump, so gravity can feed the pumps inlet. Also make sure that your res is 100% full. install an air bleeder tube if you currently dont have one.

And something else that hasnt been mentioned. But is the front of the rad restrieted by the case? I would removed all case metal that is in front of the res. I mean cut a big square hole in your case. Also the front plastic of the case bexel should be modded to allow adaquate aire flow thrue the rad. and also are U using a fan shroud to displace the fan off of the rad at least an inch? To remove the dead spot created by the fans center motor?

let me know.
Hope this helps.