any tips on bleeding a loop?

[equk]

I have setup a small loop in my case

pump/res > cpu block > 240 rad >

I have filled the loop and have been trying to get rid of the bubbles.

If I run the pump for more than 5seconds it starts gargling where it's pushing air bubbles back around the loop as the res seems really small

Anyone got any tips on bleeding it?

if I leave it on for a while it just keeps pushing the air thru the system

Not sure whether to get a better res or maybe try a t-line?

this is the res

 

[JN]

You could try squeezing the tubing on the 'output' side of the pump. Tends to keep the pump primed a little more (so less foam) while also pulling in coolant from the loop.

Or try running the pump at a lower voltage for a while. A DDC with such a small loop is bound to cause some turbulence.

 

[equk]

You could try squeezing the tubing on the 'output' side of the pump. Tends to keep the pump primed a little more (so less foam) while also pulling in coolant from the loop.

Or try running the pump at a lower voltage for a while. A DDC with such a small loop is bound to cause some turbulence.

I was thinking of modding it down to 10w?

just seems like the water is going thru at such a rate it creates the bubbles in the res

 

[JN]

Personally I'd just slap it on a little variable resistor / fan controller so you can fine tune the output?

 

[equk]

Personally I'd just slap it on a little variable resistor / fan controller so you can fine tune the output?

cool, I'v found a rheostat, but not sure if it will be ok under 18watts

might give it a go tho

 

[JN]

cool, I'v found a rheostat, but not sure if it will be ok under 18watts

might give it a go tho

I've got some 5A ones floating about, but man are they huge

 

[equk]

bah just blew a rheostat haha

 

[JN]

You need one of these

 

[equk]

You need one of these

lol

I have some ideas on stuff to try

1. move the barb from the top to the bottom so it's running off the head but also leave the res on (not sure if this will suck air in)

2. open up the pump and desolder the 18w wire so it runs at 10w

3. run it at a lower voltage

 

[equk]

just ran it at 5v and there are no bubbles or anything, not sure about the flowrate but it seems like it's the res that's causing the problem

 

[JN]

just ran it at 5v and there are no bubbles or anything, not sure about the flowrate but it seems like it's the res that's causing the problem

You could give the 7v fan trick a go on it? Might be the sweetspot between flow and bubbles.

 

[equk]

You could give the 7v fan trick a go on it? Might be the sweetspot between flow and bubbles.

I tried it like this:

but it didn't even seem to run the pump up for some reason and the psu kept cutting out

 

[JN]

I tried it like this:

but it didn't even seem to run the pump up for some reason and the psu kept cutting out

Yeah some PSU's aren't keen on the 7v trick. Wont do any damage, but as ya say it'll just cut out probably from UVP or something like that. Fan controller options will be quite slim too if you're trying to control 1A+.

10w mod might be your best bet, or I can take some pics of those rheostat controllers I've got knocking about if you;re interested

 

[equk]

I'm only running it on my old psu atm so 7v trick might work on my alienware psu

Might still try the 10w mod (altho that would mean emptying most of the loop

)

 

[JN]

I'm only running it on my old psu atm so 7v trick might work on my alienware psu

Might still try the 10w mod (altho that would mean emptying most of the loop

)

Best thing I ever bought was some of these type things. Not sure what their name is but the ones I've got are made from metal and have a thumbscrew at the top. Just stick one either side of the pump and you'll only loose whats inside

Hopefully the Alienware doesnt mind 7v trick tho

 

[Colt1911]

I'm not terribly experienced, I just got my first water system, but mine did the same thing when I hooked it up. This is what I did (and some of what I read). pinch off the pump outlet with your fingers to give a slight restriction for a few seconds then let off. you can repeat over and over. What I read (which helped aswell) was running the pump at a low speed. I have a controller, but if you dont, try hooking up a NO or NC momentary switch, hook the pump to a PS and hit the switch in repitition to alter the duty cycle. Sort of like in a racing game when your going around a curve using a digital controller *tap* *tap* *tap*.

After a little while mine worked its self out. Hope your does too

 

[equk]

I've just installed my 360 radiator and changed the input barb around on the res/top so it's running like a top

(but I still have a res on top to fill water)

Got it running at full speed, just bleeding it now which is probably going to take a while with the two radiators.

I'm amazed at how quiet the pump is at full power