H80i noise issue from water block

Hey guys,



Installed my h80i and I am getting a weird sound or clicking from the water block on the CPU. Sounds like a hard drive read in data... it is not a vibration from fans fyi.



Any idea what could be?



Thank you guys.



Got this video from a guy ( youtube source ) I have the same problem.

I tried to contact him, but no success.

http://ift.tt/1vezfG0