H105 cooler help

[localm007]

Just built a pc and installed this cooler(h105) everything was running fine for a week. Yesterday I turned my pc on its side to install a 5th fan and when I turned my pc back on I heard a muffled rattling sound... It's coming from the heatsink area of the cooler... Not the radiator or the tubes or any of the fans or even the gpu. I checked everything... Is it bubble rattle? Will that go away? Should I worry? Thank you

 

[feelinfroggy777]

In my experience when you turn on a AIO for the first time, you will hear some gurgling. But it should go away in a couple of seconds. If it is not going away I would take it back for a replacement.

 

[TechyInAZ]

H105 owner here, yeah it's normal to hear some gurgling, that just means there are air bubbles in areas of the AIO where there shouldn't be. The easy way is to just let the pump get rid of them after a few weeks. Or you can try tilting the cooler to get all the air bubbles into the radiator itself.

 

[localm007]

Thanks. I haven't ran it more than several minutes so I'll give that a try and see if it fixes itself. The tempurtures seem normal under stress tests so it's probably just those bubbles....