[SOLVED] PC making grinding sound on cold startup

[lxnars]

Hey, recently everytime i startup my pc on a cold startup (usually overnight) my pc makes a super loud grindy sound for around 5 minutes before going down to its normal noise, listening to my pc closely and stopping fans, I think its coming from the radiator of my AIO. I've searched everywhere and I've tried things such as tilting the pc/laying the pc down and tapping on the AIO, I've laid the pc down overnight as well and its still an issue, is there a fix to this without potentially buying a new AIO?

 

[jay32267]

My first though is the bearings on one of the fans on the AIO is going.
You probably can replace just the fan....but I would do both....and you might find them on EBay. I find a lot of different fans on EBay.

 

[lxnars]

My first though is the bearings on one of the fans on the AIO is going.
You probably can replace just the fan....but I would do both....and you might find them on EBay. I find a lot of different fans on EBay.

I've verified its not the fan

 

[jay32267]

I've verified its not the fan

Other than the liquid...isn't the fan the only moving part on the AIO?
Might it be air?

 

[lxnars]

Other than the liquid...isn't the fan the only moving part on the AIO?
Might it be air?

it may be the liquid, I'm mostly looking at air bubbles, but after trying to solve it with the solutions above I'm just confused now

 

[Mtop]

Watch your CPU temp - Does temp go down after 4-5 minutes?
Are fans speeds the same?

 

[lxnars]

Watch your CPU temp - Does temp go down after 4-5 minutes?
Are fans speeds the same?

the temps are the same throughout the whole process
and yes

 

[scout_03]

press on the pump pipe to see if thee sound change or temp goes up .

 

[Mtop]

Cold loose - Hot tight
All I can think of is the bracket for AIO, the CPU clamp
Nothing wrong there you may have an AIO going bad - pump bearing? air bubbles?

 

[rickypicky5]

I've verified its not the fan

Then it must be the pump itself.

 

[Randi Poling]

Is the pump part of the radiator? If so, could be a bad, or going bad pump.

 

[rickypicky5]

Is the pump part of the radiator? If so, could be a bad, or going bad pump.

AFAIK, no. The pump is either in the heatsink, or just on top of it.