Taurus Fan Test. Need Feedback!

I test fit the Taurus radiator this evening for fit and function. Everything seemed good except that I'm hearing a clicking noise during operation. Watch the video and let me know what you think. The air flow seems good so I'm happy with that. High speed I think would be overkill so I'm just going to run the low speed. Right now I'm just worried about the noise. This is a brand new unit.

[ame]http://youtu.be/nUfCGZWxyHo[/ame]