No Flow in the system. 2x 360 rads + 420mm Rad ????

ViRuS2k

ViRuS2k

ViRuS2k

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I tested tested the loop out
with 1 d5 vario max speed and once pressure or loops if filled up circulation stops dead.
tried removing the external 420mm rad and same issue.

tried using 2 pumps one at the start of the loop and one mid loop to try and get some circulation again as soon as the loop is full flow stops dead.

am i doing something wrong here or what cause the only other thing i can think of is that there is a high flow blockage somewhere. or high resistance.

if i try to blow out all the water i have to put a lot of effort into draining the system as in a lot of pressure

i really have no idea what to do next.....

is there a pump out there from some other vendor that has very very high head pressure.
cause i think thats what i need to get the flow going.
 
NMBlack said:
Did you flush the rads properly before you fitted them?
Click to expand...

No i didnt flush them 1 360mm and 1 420mm where both phobia monsta`s i read somewhere that they dont require flushing out before use also my red mayhems coolant has turned from a light red to a dark dark red color.

though i have been using the same coolant for ages when i dump the coolant from the system there is loads of black little bits at the bottom of the bole ....

so what do you recommend is the pump powerfull enough to go through 3 radiators cpu and gpu block without loosing flow ?? cause i tried using 2 pumps both had the same head pressure 3.7m

just that the flow still stops moving when it gets almost full of coolant.

do you think i have a hard resistance blockage somewhere ? cause the pump is ment to show a vortex when its all flowing right but its as still as anything in the res.
 
Last edited:
Try just pumping through and see, just use water in a bucket to feed the pump. Make it go all through the loop and feed it back into the bucket.

Or try each component separately to see if there's a problem.

Have a D5 with 2 360 + GPU/CPU with no issues
 
ViRuS2k said:
No i didnt flush them 1 360mm and 1 420mm where both phobia monsta`s i read somewhere that they dont require flushing out before use also my red mayhems coolant has turned from a light red to a dark dark red color.

though i have been using the same coolant for ages when i dump the coolant from the system there is loads of black little bits at the bottom of the bole ....
Click to expand...

Always flush the rads before you install them. The darkening change in colour of the coolant and the little black bits you can see in the bowl are the reason why....bits of gunk left over during the manufacturing process that the manufacturers haven't got the time to remove. They can also clog pumps over time and stop them working.
 
Yeah it's a good idea to flush your radiators out, but I don't believe that's at the heart of your issue with flow. It's likely to be something like an air lock somewhere and it'll just be a case of bleeding the loop of trapped air (presumably from one of the radiators).
 
thanks guys will give it a shot tonight will pull all watercooling gear out and flush the radiators with warm water
then i will take the cpu block and gpu blocks out and check for blockages and bits that have gotten stuck it then will retry once again and see if there is flow

but seriously even with all that done do you think there is enough flow rate of this pump to go through 1 gpu block 1 cpu block 2x 360 radiators and 1 420 radiator and back to the pump.

are these xpsc d5 vario pumps enough for something like this...

i see videos on youtube with people using these pumps with quite a few radiators and quad setups and they have no issues....
 
NMBlack said:
Always flush the rads before you install them. The darkening change in colour of the coolant and the little black bits you can see in the bowl are the reason why....bits of gunk left over during the manufacturing process that the manufacturers haven't got the time to remove. They can also clog pumps over time and stop them working.
Click to expand...

This x1000. Even if they claim they are pre flushed still flush them. I did a 2 day cleaning routine on my g-changers
 
There seem to be something really wrong. I can run 1x480, 2x240 and 1x360, two gpu blocks (parallell) a cpu block and a vram block on one D5 (i have three pumps in the loop, but when filling the loop i usually just run one). While the flow porobably wont be very high, you should definitely have atleast some flow.
 
going to give the loop a drain and flush rads and clean blocks at the weekend and retest
will be using 1x D5 vario pump to go through

1cpu block 1 gpu block 2x 360 rads and 1x420 rad.

im sure i must have a blockage somewhere cause when i was bleeding the system the first time to change pump it took a lot of blowing pressure to get the loop drained.
 
Yeah, a D5 should be perfectly fine with that.

I have a D5 running 2 GPU's a 480mm rad and a 240 X -Flow
And another doing Mobo, 2 RAM blocks, CPU & 480mm Rad
I don't need it on more than 50% to cool everything.
 
Well i fixed the problem.

But i have had to use an unorthodox method.

its probably not the right way but temps are great.

-----------------------------------------------------------------

i have decided to remove the 420 external for the time being
then i changed the flow of the system from clockwise to counterclockwise.

instead of the pump res going to the 360 rad then the next 360 rad then the cpu block then the gpu block then back to the pump, that method for some reason stops flow.

so i changed it to rad/pump to gpu then gpu to cpu then cpu to 360 rad then 360 rad to 360rad then back to the pump.

means all that hot air from my R9295x2 is going to be dumped onto the cpu.
but going by temps they seem fine.

for now this works but i have a feeling its going to need to be changed in the future so that the gpu does not dump heat into the cpu....

but the weird thing is i now have good flow and i can see in my res a vortex or liquid going around and around now where as before i didnt.
 
ViRuS2k said:
Well i fixed the problem.

But i have had to use an unorthodox method.

its probably not the right way but temps are great.

-----------------------------------------------------------------

i have decided to remove the 420 external for the time being
then i changed the flow of the system from clockwise to counterclockwise.

instead of the pump res going to the 360 rad then the next 360 rad then the cpu block then the gpu block then back to the pump, that method for some reason stops flow.

so i changed it to rad/pump to gpu then gpu to cpu then cpu to 360 rad then 360 rad to 360rad then back to the pump.

means all that hot air from my R9295x2 is going to be dumped onto the cpu.
but going by temps they seem fine.

for now this works but i have a feeling its going to need to be changed in the future so that the gpu does not dump heat into the cpu....

but the weird thing is i now have good flow and i can see in my res a vortex or liquid going around and around now where as before i didnt.
Click to expand...

have you switched around the fittings on your Res & CPU block when you did this?
 
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