Picaroon Posted January 22, 2010 Share Posted January 22, 2010 It seems there's some trapped air inside the H50 unit (hearable when I gently shake the radiator). Does this keep the pressure within a certain limit when the warm fluid expands? Or shouldn't be there any air in the unit in the first place and is my H50 defect? Temperatures are fine by the way. 30 degrees Celsius lower compared to stock cooling. Link to comment Share on other sites More sharing options...
anthonywilliam Posted January 22, 2010 Share Posted January 22, 2010 I ran my newbuild for the first time this morning and I could hear a slight gurgling noise from the H50. This settled down after a while and I heard no more. I imagine that there is a little air inside but, like you, don't know if there should be. Be interesting to see a reply from the Techs. Link to comment Share on other sites More sharing options...
Rex82 Posted January 23, 2010 Share Posted January 23, 2010 When I first got my unit, I also shook the radiator a bit and could hear some movement. I powered it on and I indeed heard some sloshing but went away after a minute. I think it's fine as my temperatures are pretty low (high/mid 30's) Though I am worried that I don't know how long before the liquid inside evaporates Link to comment Share on other sites More sharing options...
joytech22 Posted January 23, 2010 Share Posted January 23, 2010 When i first got mine, and installed it, the moment i turned it on it "sloshed" for about half a second, it hasn't happened again since. Link to comment Share on other sites More sharing options...
SeanG Posted January 23, 2010 Share Posted January 23, 2010 Mine never sloshed and I dont know how you can hear air shaking the radiator.:confused: Link to comment Share on other sites More sharing options...
MI-Tazz Posted January 23, 2010 Share Posted January 23, 2010 There is going to be air in the H50's, just as well as there is air in most water cooling setups. If you shake the radiator you will hear the coolant moving back and forth. As others have stated, once they fired up their H50's the noise went away after a little while. This is because the system has worked the air to the highest point in the loop, which means the air is no longer being pumped through the pump. Link to comment Share on other sites More sharing options...
Picaroon Posted January 23, 2010 Author Share Posted January 23, 2010 @seang: I think it's pretty clear what I mean :) @rexy82: I can't imagine the liquid eventually evaporates, because the h50 is a closed system. Link to comment Share on other sites More sharing options...
jroymd Posted February 7, 2010 Share Posted February 7, 2010 After three months of uneventful cooling, I noticed an air/fluid churning sound in my H50 which eventually went away after 20-30 seconds. I also attributed it to trapped air that worked its way to the high point of the heat exchange unit, not unlike old cars without a radiator expansion tank. Upon closer inspection, I saw coolant dripping from the pump assembly which spread over the bottom half of the motherboard and video card resulting in intermittent and unexplained crashes on my ASUS P6X58D Premium motherboard. This event was mentioned this on another thread but received no responses. I had to replace the damaged video card. I was able to salvage the motherboard, but it took several hours to mop up the ethylene glycol with cotton swabs, aspirate the blobs of fluid that adhered to the underside of the components with a mini-vacuum cleaner attachment, and carefully blow out the rest of the gunk with compressed air. The ethylene glycol is quite tenacious and difficult to remove. I think the H50 design is a good concept, but I would monitor it for any signs of a leak. As to the comments about "no other complaints about H50 leaks," somebody has their head in the sand. I have since replaced the H50 with a low noise fan based cooling unit. DO YOURSELF A FAVOR AND LOOK FOR A LEAK AT THE PUMP HEAD. Link to comment Share on other sites More sharing options...
jroymd Posted February 7, 2010 Share Posted February 7, 2010 When I first got my unit, I also shook the radiator a bit and could hear some movement. I powered it on and I indeed heard some sloshing but went away after a minute. I think it's fine as my temperatures are pretty low (high/mid 30's) Though I am worried that I don't know how long before the liquid inside evaporates I think you have it reversed. Charles' law (also known as the law of volumes) is an experimental gas law which describes how gasses tend to expand when heated. The trapped air in the H50 will expand when the CPU transfers heat to the heat sink in the pump head. The only way the air could disappear is to lower the temperature of the fluid or dramatically increase the pressure within the sealed system (Boyle's Law). As I said in my other post: BE VIGILANT FOR ANY BREAKS IN THE SYSTEM INTEGRITY. Link to comment Share on other sites More sharing options...
bobcb Posted February 8, 2010 Share Posted February 8, 2010 So far all the 'leaks' I've seen it has been extreme stress around the barbs, so while I appreciate you had issues, I don't think the whold system is flawed. Link to comment Share on other sites More sharing options...
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