[SOLVED] CPU fan rattling/grinding noise

[dremix]

Hello everyone!
This is my first post and I hope I did it in the right section.
I've recently bought a new AIO cooler which is the Masterliquid ml240 r rgb.
Lately the two fans have been doing a rattling/grinding noise when I play due to the increase in the amount of speed.
I've looked up on google how to oil the CPU fans but to my surprise I've found out that unlike many others I don't have a rubber cap that I can remove to lubrificate the bearing, it is instead sealed where the hole should be but there's a small hole on the side where I can see some sort of components (sorry for the wrong terminology, I don't know much about PCs).

https://imgur.com/FemZjKt

View: https://imgur.com/FemZjKt

https://imgur.com/niv1CwQ

View: https://imgur.com/niv1CwQ

I was wondering if this is where the lubrificant should go but I didn't want to damage the fans somehow.
Could anyone help me? Thanks in advance

 

[CountMike]

I think that they come with 5 year warranty, I got a pair of fans for my Nepton 140 XL few months ago, one fan stared rattling like that and they sent me both for free.
Otherwise, only squeaky fans can be fixed with oiling them, not when bearing goes bad.

 

[icedog]

I think that you have to sent the aio back to coolermaster and you should properly have a warranty to deck the cost.

 

[CountMike]

I just called regional office, they just asked for serial number from packaging and sent me fans free, I only had to pay for shipping.