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Problem: too much restriction? Radiator crunching when turning off pumps? - Page 4

post #31 of 41
Is it possible for you to get any video of this sound? That might help identify the problem. My guess is there's either a lot of air in the radiator, or there's semi-loose flux in there rattling around.
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post #32 of 41
Thread Starter 
I don't think its semi-flux depot inside.

This is why I think so, its complicated the way I'll explain (and english is not my mother language) but it goes like this.

Reservoir is open --- Pumps are off

-I turn on the pump
-Then the water level inside the reservoir is lowering (due to pressure I guess)
-Loop works fine (but still less flow than previous setup)

IF: I turn off the pumps, the level inside the reservoir kind of splash back higher to its original position while loop off. No sound on the radiator, I guess due to pressure leaving outside the reservoir.


Reservoir is open --- Pumps are ON

-Loops works fine

IF: I close the reservoir while the pumps are running, the loop still works fine but as soon as I shut off the pumps. Its like if the water want to expell some pressure but can't ... so Instead, the pressure seems to go all inside my top radiator and then it does a crunching sound. I assume that some pressure build in all my loop but the top rads seems to take the biggest hits.
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post #33 of 41
If you have a way to rock the entire case onto its back, without damaging the radiator, you could probably work the air out of both of them by gently rocking the whole thing onto its back, then back upright, with the pumps running.
Maybe alternate between having one and both pumps running.
You would need to make sure the reservoir outlet to the pumps is below the water line the whole time though.

I've got the radiator in both of my systems piped so they can be pulled out and moved around to work air out of them while bleeding.
Most of the time physics is working against you to some degree when trying to get air out of them.

Mine are "side panel closed" systems that are not for showing off though. wink.gif
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post #34 of 41
Semi off topic.....

Am I looking at this correctly? Do you have a 480, 360 and a 240 rad in that system? Overkill much? thumb.gif
 
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post #35 of 41
Thread Starter 
I know its overkill rolleyes.gif
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post #36 of 41
You want overkill has anyone seen this beast yet LoL lachen.gif

http://www.overclock.net/t/584302/ocn-water-cooling-club-and-picture-gallery#post_7303872
700

Don't get me wrong it's very creative, but my first reaction when I saw this was Why?
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post #37 of 41
Quote:
Originally Posted by WeirdHarold View Post

You want overkill has anyone seen this beast yet LoL lachen.gif

http://www.overclock.net/t/584302/ocn-water-cooling-club-and-picture-gallery#post_7303872
700

Don't get me wrong it's very creative, but my first reaction when I saw this was Why?

My wife would withhold you know what for months until took that down lol.




Man I hate dutch shots...
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post #38 of 41
Man thats only three rads I run four 360's lol
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post #39 of 41
Quote:
Originally Posted by KaRLiToS View Post

-I turn on the pump
-Then the water level inside the reservoir is lowering (due to pressure I guess)

That right there shows me the issue; air pockets.

Water is, as far as we are concerned, uncompressible. The tubes and rads will expand very slightly with the pump pressure but I very much doubt you will notice a level drop due to that. That just leaves air pockets in your loop compressing, reducing the volume of fluid in the loop and being replaced by water from the res, causing a level drop.

The reason it may have worked fine for a while then presented problems is either that your pump is drawing bubbles into it from turbulence in the res or that some small bubbles from the initial fill have eventually collected somewhere and formed a large bubble.

If your pump is drawing air due to turbulence in the res you either need to re-position your inlet to make sure it is below the water level and / or get some aquarium sponge to put over the outlet. No need to change res, unless you really want to.

Either way you still need to bleed your loop as others have suggested. The bracket you have holding the rear rad has a quick release, so you can detach the rad from your case and move it round to aid the bleeding. Just be careful not to pop a hose off whilst you do it.

The top rad needs another approach; try rotating, as previously suggested, to allow the air to follow the flow path of the rad. Tap parts of the rad with something like the handle of a screw driver to help detach the bubbles from the walls. Also turning your pumps on and off with the rad in different positions can help.

I sometimes find that heating the water helps with the bleeding process. To do this I run OCCT and Furmark and turn off my fans. Doesn't take too long to get the water up to ~45°C (I tend not to go further) which can sometimes help to move the bubbles along.
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post #40 of 41
Thread Starter 
GingerJohn, I appreciate your elaborated explanation.

Is it also possible that I connected the GPU Bridge the wrong way, I mean, inlet and outlet are not correct?
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Asus ROG Swift PG348Q (3440x1440 @100hz) CrossOver 27Q Led-P Logitech G15 EVGA SuperNova 1600T2 (Titanium) 
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Corsair Obsidian Heavily Modded Logitech G700 RocketFish Speed/Control M-audio AV-40 (Logitech G-35) 
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Quad Damage
(24 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 4930k @ 4.6Ghz Asus Rampage IV Extreme (Koolance Full WB) 2 x GTX 1080ti FE in SLI (EK WATERBLOCK) Corsair Dominator GT 2133 MHz (16GB) 
Hard DriveHard DriveHard DriveHard Drive
3 TB Seagate OCZ Vertex 4 256GB Crucial M4 128GB ADATA SX900 128GB 
CoolingCoolingCoolingCooling
RIVE Koolance Waterblock (VRM and PCH) Feser X-Changer 360 Feser X-Changer 240 Feser X-Changer 480 
CoolingCoolingCoolingOS
WaterCool MoRA3 Pro with Gentle Typhoon 3 x MCP 655 pumps (With EK top...all serial) 2 x EK FC 1080ti Blocks Windows 7 Ultimate x64 
MonitorMonitorKeyboardPower
Asus ROG Swift PG348Q (3440x1440 @100hz) CrossOver 27Q Led-P Logitech G15 EVGA SuperNova 1600T2 (Titanium) 
CaseMouseMouse PadAudio
Corsair Obsidian Heavily Modded Logitech G700 RocketFish Speed/Control M-audio AV-40 (Logitech G-35) 
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Reply
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Overclock.net › Forums › Cooling › Water Cooling › Problem: too much restriction? Radiator crunching when turning off pumps?