Question Watercooling pump making hum noise

[Dovahkiin673]

My pump started making this noise randomly a week or two ago

View: https://youtu.be/u1CUIL8n7o4

I can confirm that it's coming from the pump.
I tried running the pump alone to bleed the loop for air bubbles for about 45 minutes but that didn't work. Water is flowing and everything seems to be working as usual (besides this noise of course). Temps are slightly higher than usual while idling but nothing meaningful and they're normal under load. The pump is vibrating my entire case slightly.
My loop goes Res/pump>rad1>Cpu/mobo<rad2
My pump is the EK D5 pump and bay reservoir combo. Any help would be greatly appreciated.

 

[digitalgriffin]

My pump started making this noise randomly a week or two ago

View: https://youtu.be/u1CUIL8n7o4

I can confirm that it's coming from the pump.
I tried running the pump alone to bleed the loop for air bubbles for about 45 minutes but that didn't work. Water is flowing and everything seems to be working as usual (besides this noise of course). Temps are slightly higher than usual while idling but nothing meaningful and they're normal under load. The pump is vibrating my entire case slightly.
My loop goes Res/pump>rad1>Cpu/mobo<rad2
My pump is the EK D5 pump and bay reservoir combo. Any help would be greatly appreciated.

How is your radiator positioned? Are the connection barbs top or bottom if vertical rad? If could be running out of coolant.

 

[Dovahkiin673]

The radiators are both placed horizontally, with one at the top of my case and one at the bottom.

 

[grimfox]

Is that just the camera or are the hoses yellowing? Have you used a dye before and they are just stained?

 

[Dovahkiin673]

I used to use a red coolant, so I assume that they're just stained

 

[Turtle Rig]

Can you reduce the speed of the pump and see if the humming noise reduces. If it does then that is just the way it is, unless at one point there was no humming noise and what not.

 

[rubix_1011]

So, it's a D5 and I can see movement in the reservoir, so that is decent so far.

Is coolant moving? What are temps like? Have temps changed? Or is this only about noise?

The tubing looks absolutely horrible - how old is it? When was the system last flushed and re-filled?

I'm wondering if the noise is just vibration noise like a mounting screw came loose or fell out, or something else happened. Can you confirm if all mounting screws are in place?

 

[Dovahkiin673]

The coolant is moving, and the temps are fine, if (very) slightly higher than usual. The tubing is 2 - 3 years old now, I last flushed the system a couple of months ago. The hum is still there with the mounting screws in. Also, the noise did not reduce when I turned the pump speed down.