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Currently leak testing (finally!) -- few questions!

post #1 of 6
Thread Starter 

Leak testing for an hour now, so far so good.

Couple things I didn't expect (and questions):

- Radiators (XSPC RX120 & RX360) making dripping/leaking water sound. This may be normal, I just expected the loop to be completely silent other than the pumps and maybe slight ambiance of flowing water (but not dripping water ambiance). Is this normal? Here's a video I made real quick of the sound, you may have to turn volume way up:


- Pumps are decently loud, but nothing unexpected with two of them (2 x MCP355 through EK DDC Dual Top). The only thing I find odd, which may be completely normal, is a sound that to me sounds like frying water. That said, the reservoir has water (200ml-300ml) so the pump is definitely not running dry. I guess that's just the normal sound, or that is the sound with the pressure intensified as it's going through the EK dual top. Nonetheless, here's a video of the sound and maybe you guys can tell me if it's normal (turn volume up):


- When initially filling the loop I filled the reservoir to 300ml, turn on pumps, let water flow, stop pumps, fill reservoir to 300ml, repeat. Until the reservoir stopped draining. When the reservoir stopped draining I sat idly watching. At about 15 seconds the reservoir shot down to 100ml, and I stopped the pumps. When I turned off power the reservoir water shot up to 300ml. I turned the pumps on again, water went down to 100ml and then I filled the reservoir to 300ml while pumps were running. The pumps have been running since stabilized at 300ml. My concern is if I turn off the pumps, is the water going to shoot up past 350ml (roughly maximum capacity) and overflow outside?

- Also pump/reservoir related: it's been about an hour now and the reservoir was at 300ml but has slowly reached 200ml, I take it this is normal on first run and it will eventually stop lowering?

Just for reference, my loop is:
Res -> Dual Top Pumps -> 360 -> CPU -> 120 -> GPU #1 -> GPU #2

The 360 (mounted at the top) is the highest elevated component, followed by the reservoir.

If all goes well I will post my work log soon. Here's a picture of the leak testing. (towel crazy)
post #2 of 6
The rad sounds like it has air in it which is normal, it will work itself out over time. That's the gurgling you're hearing. The fluctuation in water level is due also to the air in the lines, which again will get reduced over time. I would fill the res, seal it, and let it run while you watch it, with that much water in the loop you don't have to worry about the pumps running dry, so you can wait for the res to get pretty low and then refill while running. Remember that the air and water will simply switch places in the res so there's no need for the res to be open during leak testing.

Edit: I always leave a bit of a buffer in my T-line to allow for pump expansion/compression, but as long as your res is sealed, even if it's full there won't be any leakage. Just remember that if you top it off while running, you'll need to beware of opening the res when it's off as the water may surge on you. You'll notice microbubbles working their way out for a week or so, so continued water intake is normal, but it will level off and you'll see that it'll be maintenance free- just make sure that if you don't keep it topped off, give yourself some expansion room. It's alot easier to add water than to mop up the mess

Congrats on the new loop!

Also, once the bubbles are out, it will be silent aside from pump/fan noise.
Edited by SaltwaterCooled - 1/23/11 at 5:12pm
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AC Mk-800 Cobra
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post #3 of 6
Sounds should go away as you get all the air out of the loop.
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post #4 of 6
The noise is just air escaping, the radiator noise will go away with time. Tiling and shaking the case helps a lot for getting the air out.

Once you've got the reservoir filled put the cap back on before turning the pumps off and the air pressure will prevent the water from sloshing back into the reservoir.
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post #5 of 6
Quote:
Originally Posted by charliehorse55 View Post
The noise is just air escaping, the radiator noise will go away with time. Tiling and shaking the case helps a lot for getting the air out.

Once you've got the reservoir filled put the cap back on before turning the pumps off and the air pressure will prevent the water from sloshing back into the reservoir.
Everyone recommends tilting and shaking, but at least for me, my case weighs in at a puny 75lbs, so I just leave it alone and let the pumps work.. Plus then I don't worry about ratting anything important. It may take a bit more time, but this latest edition only took about 30 minutes to quiet down and then several days for the small bubbles to work out. I usually start 'er up even with a few bubbles still bouncing around, there's enough water to get the job done...
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AC Mk-800 Cobra
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post #6 of 6
Thread Starter 
Alright I capped the reservoir and got rid of the radiator sounds.

I've been rocking the case as well, I think most bubbles are gone. Of course I have white tubing so it's really hard to see, but I can barely make out bubbles on the tubing. The reservoir has tons of bubbles, which I'm assuming is a good sign.

Thanks for the help all.
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