Water Cooling System Slowly Loses Fluid - Also, advice on adding gpu waterblock

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drake2231's picture
Joined: 06/17/2009
Posts: 51

I have had a custom water cooling system for about 6 months now and it slowly loses fluid. I have hear this is common but I was hoping to get some feedback from someone with experience in these. It has an EK block, res, and radiator with a swiftech pump. I am using Primochill fluid that you pour straight from the bottle into the system(as opposed to the additives to distilled water). I was very careful assembling it and making sure everything was properly assembled. I cannot find signs of a leak anywhere. Is it normal for a custom system to slowly lose fluid?

Any help is very appreciated

Also, I am adding a GPU waterblock soon. Will it affect the CPU(high overclock) much to have it in the loop before the CPU waterblock? I do have a EK 360 radiator with 3 120mm fans so I am not worried about the system being able to handle the added heat, just a little concerned about how much more heat the water will be able to carry after being passed through the gpu.

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Joined: 02/21/2009
Posts: 68

i would put the gpu after the cpu rather than before it, since your overclocked, and plus gpu's run very hot, as for leaking, if you are using dyed fluid, you can put a white piece of paper under and area where you have w/c hardware, like the bottom of your case, is your radiator on the inside or outside, if its on the outside, place one under it outside as well, this will track a leak after the water has evaporated, as it will dye the paper, if its leaking slowly like you say. your not going to see a pool of fluid, monitor that for about a week, it will help you find out if there is indeed a leak, and if there is, i would reconnect all your hoses and secure them tightly, and run the system outside the computer to better monitor the connections.

Andreas Hofer
Andreas Hofer's picture
Joined: 10/31/2009
Posts: 121

Most tubes you will find in water cooled systems will leak small amounts of water over time. Some materials tend to leak much more than others. I've had similar problems in the past with my water cooled workstation PC (almost no water in the reservoir after 6 months, the pump suddenly made some strange noises because of all the air sucked in and performance dropped dramatically). I've replaced all tubes with stainless steel tubes, like the ones used in bathrooms, just a little smaller, to solve the issue. Note that those tubes come with various fittings, choose the one suitable for your configuration.

The reasons why you should place your CPU first is that not only do GPUs get very hot, they were also designed to handle those high temps. Although I doubt that you will reach those temps with a decent water cooled setup. If you would like the temperature to drop a little further (maybe because you'd like to have some room for OC your GPU) you could place another radiator between CPU and GPU (also known as inter-cooler).