Question How can I tell where air is entering my water-cooling loop?

Jan 18, 2021
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I've got air entering my watercooling loop, causing the cpu block (which is the highest point that air can get trapped in my loop) to be constantly half-full as the water flows through the bottom half of the block only. When I tilt the case I can get rid of the air, but gradually within a few minutes of running normally, the air comes right back.

There's no water leaking at all. The only clue I have that the air isn't entering via the cpu block itself is that I can see the tiny air bubbles gradually flow up through the tube leading from the gpu block up to the cpu block instead of bleeding out through the open cap at the top of the reservoir as you'd expect if the air was being circulated all the way around the loop.

I've tried running the loop without the cap on the reservoir to let the air escape several times, but this hasn't worked which makes me think the air must be getting in somewhere between the pump and the cpu block. I have absolutely no idea how I can check where though.

I also wondered if anyone knows whether or not running the system with a half-full cpu water block could damage the cpu by not prodiving water all the way around as seen in the photos?

FYI the pump is running at 100% speed permanently. Thanks in advance for any help!



 

Ferimer

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Aug 19, 2011
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I've had it for just over 2 years, and it's still within a 3-year warranty including collection, parts & labour.
Yeah you've lost some water over that time. Evaporation still occurs in these systems. and as the above poster also mentioned you can see that the tank isn't filling up as much as it should, so the air is getting trapped in there and just pushing through your loop.
 
Jan 18, 2021
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Yeah you've lost some water over that time. Evaporation still occurs in these systems. and as the above poster also mentioned you can see that the tank isn't filling up as much as it should, so the air is getting trapped in there and just pushing through your loop.
But there's enough liquid in the reservoir that the pump isn't pulling air down, and plus i've tried leaving the cap off so theoretically the air coming through the loop would escape up through the top of the reservoir instead of being pulled down through the pump?
 

Ferimer

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Aug 19, 2011
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But there's enough liquid in the reservoir that the pump isn't pulling air down, and plus i've tried leaving the cap off so theoretically the air coming through the loop would escape up through the top of the reservoir instead of being pulled down through the pump?
When the Water gets forced through the radiator to cool down Oxygen (aka Air) gets pushed in through the water that needs to be cooled down. That process of cooling will cause evaporation within the radiator over time thus allowing the oxygen in the water (H20) which is 2 parts oxygen to possibly get trapped into the tubes and keep pushing through. Its what happens over times. It is part of the reason I avoid Water cooling Loops. one leak and things get ruined and they only last for so many years. If you are still within warranty I would just get it fixed and or replaced.
 
Jan 18, 2021
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When the Water gets forced through the radiator to cool down Oxygen (aka Air) gets pushed in through the water that needs to be cooled down. That process of cooling will cause evaporation within the radiator over time thus allowing the oxygen in the water (H20) which is 2 parts oxygen to possibly get trapped into the tubes and keep pushing through. Its what happens over times. It is part of the reason I avoid Water cooling Loops. one leak and things get ruined and they only last for so many years. If you are still within warranty I would just get it fixed and or replaced.
That's interesting and makes sense. Thanks for your help, I think i'll have to get it sent off to be repaired as you say.
 

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