Cooler master nepton 240m pump noise

[JOHN PLAYER]

hey guys.
i use nepton 240m since 2014
the 1st year i couldn't get any problem but past week i face problem regarding pump
it create bad noise like rattling and i think its not good what i can i do guys help me

 

[CountMike]

It's a part of closed system, there's no much you can do about it but change or return it for replacement. I think they have 5 year factory warranty.