AIO rattling

[dzmin]

I‘ve owned the Corsair H150i Capellix XT AIO for about 1 week. When I turn on my PC after, for example, more than 8 hours of being off, I hear a rattling noise from the pump for about 3 seconds, then immediately stops and doesn't appear again, even if I turn off and on the PC, and sometimes it doesn't even happen after 8 hours. Should I be worried? Could it be because I have the radiator mounted on the front side? Here is a photo: https://ibb.co/BGZfcrg
The noise is like this:

This is not my video, this guy has constant rattling noise but I have a similar noise.

 

[beers]

I think @Darren has experience with rattling AIOs

 

[Darren]

It's probably on its way out. Not much you can do. Mine rattled for quite a while and still cooled fine but I did eventually replace it with an air cooler.