Should I just buy a new liquid cooling unit?

Noticed weird noise coming from ?radiator? for the cooling unit... JUST started happening. Turned computer off asap as not to burn anything out. Turned it on once more just so show you guys and make the youtube vid above.

Do any of you know exactly what is wrong? I am not super good at repairs but my options are bringing it to a computer place which will likely charge 100 an hour or replace myself which I can probably do.

Unless if you guys think its something else that is manageable.

Note, it IS four years or so old.. maybe even older. Should be something similar to this http://www.avc.com.tw/product_detail.asp?id=34 (AVC brand)

http://www.frostytech.com/articleview.cfm?articleid=2321&page=2

Also. What do you guys recommend me buying if this one is a goner?

Yep, sounds like your pump is on it's way out. Might be time for a new one. What unit is that you're using? Was kind of hard to see from the video but it kind of looked like an older corsair All-In-One cooler.

Never seen that AIO before. Don't think its Corsair either. It could be some 3rd party no name one but not sure. It does sound like either your pump is on its last leg or its running dry with no fluid lubricating it or bubble trapped.

You say it's 4 years old, have you ever drained, cleaned and refilled it? Is it possible to do so?

Get an Air heatsink for your next one, pumps don't die on them.