Right up front...Your situation may signal many to ask alot of questions moreso than giving you the assistance you desire.
That said I'll start.
How are you to refill with water?
How are you to get air out?
Was it in your system?
Was it turned on?
These questions are ones you likely needed to state up front.
Now for something helpfull...I hope
You may want to check the video card forum crowd that uses these to cool GPU's. They have many members that tinkered with these, though I believe it was another brand, but someone may have tried an H80 and is fully familiar with the process of teardown / rebuild.