Massive Stationary Bubble HELP

[Commander_OO7]

Hi
I re built a system the other day which decided to generate the worlds largest bubble that does not move.

My loop goes:

Swiftech MCP655 Pump in base of case (set to max pressure)
first 3.120mm rad in roof of 800D
through flow meter
CPU (Swiftech Apogee XT)
Full Board (inc mosfets) EK FB RE 3 block
Rear 3.120mm rad
2x EVGA GTX 590 Classified Hydro Coppers (connected via Koolance Dual VID single space)
Reservoir
Back to pump

Massive bubble is between rear rad and first graphics card.

Temps are a bit higher that on first build: CPU 30 and GPU 35 but not much

On power off the level of fluid (where my finger is in a pic) moves back to the rear reservoir so the tube looks full and level in the res raises a good 2 inches.

Then on power up, the "tube level" moves back down as seen in pics within about 10 seconds and then syats there until power of again.

The flow meter is no longer spinning although as seen through the res, this clearly demonstrates that there is flow.

there were smaller air bubbles on initial fill which emptied by them selves as normal. I've shaken the the rear res 100 times and tipped up side down. Disconnected the tubing to the res and blown through it to look for blockages.

I've completely drained and refilled the system but that massive bubble appears in the same place with the same bizarre behaviour

Bottom of massive bubble:
http://imageshack.us/photo/my-images/825/bottomofmassivebubble.jpg/

another pic with flash of bottom of 6 inch bubble:
http://imageshack.us/photo/my-images/84/giantairbubbleseenclear.jpg/

Rear res where top of bubble visible:
http://imageshack.us/photo/my-images/11/rearrad.jpg/

Stationary flow meter, and “below (nearer)” full tube of res inlet port:
http://imageshack.us/photo/my-images/20/stationaryflowmeterandf.jpg/

Res filling as fluid enters from fill port (sorry I need to clean outside of it after it over flowed whilst in use in another pc)
http://imageshack.us/photo/my-images/853/swiftechresfilling.jpg/


any advice really appreciated.

Thanks in advance

 

[mmj_uk]

The flow meter is no longer spinning although as seen through the res, this clearly demonstrates that there is flow.

Can you clarify this statement please? surely if the flow meter is not spinning it points to there being no flow? (i'm guessing they work by spinning = flow? )

Is all of this running on the single pump sitting at the bottom of the case? it seems a lot to me are you sure it's not just struggling to push the water around and so the flow rate has slowed something chronic? do your load temps look normal?

edit: btw people here are complaining that those Hydro waterblocks are very restrictive, add to them a chipset block, cpu block and 2x360mm rads it seems an awful lot for one pump? especially with the uphill climb to the first radiator.

 

[Cleeecooo]

Gently bend the tube back and forth. I ha a similar problem and it was just the angle of the tubing.

 

[Commander_OO7]

Thanks for your help guys.

Temps wise, playing assassins creed brotherhood 3d temps didnt get above 45 according to EVGA precision on my g19.

Lol I agree with your observations with the flow meter. Fluid is entering the reservoir such that I can see it flowing in gently but the flow meter does not turn. I disconnected the flow meter and blew down it, but it didn't turn.

I don't know whether the flow meter has had it (its a yr old just, can't think why it would be bust) or just that the pump is dying.

As it happens whilst playing assassins creed with highest settings the fluid at te base of this huge bubble got quite kinetic and turbulent. It definitely was not boiling at all, but low and behold the bubble has overall shrunk about two inches, sufficiently that I had to add some fluid to the res as total volume had decreased and airbubbles were forming near exit of res to pump. I think that maybe the increased kinetics may have aided shrinking the bubble. Then again I'm a pharmacist, not a physicist lol.

When I load up the game for a go tomorrow I'll try gently bending the tubes to see if that helps too

Thanks again for your help

 

[pat_c]

Probably a time consuming suggestion would be to rip everything apart and test.

Blow through every component to test for blockage, then run the pump in a simple loop with the flow indicator to check the pumps flow speed in a full non restricted circle.

A MCP655 at max setting 0.33 litres per second should not be forming air cavities unless you have a major blockage. The water should not be just seeping back into res.

 

[Cleeecooo]

Probably a time consuming suggestion would be to rip everything apart and test.

Blow through every component to test for blockage, then run the pump in a simple loop with the flow indicator to check the pumps flow speed in a full non restricted circle.

A MCP655 at max setting 0.33 litres per second should not be forming air cavities unless you have a major blockage. The water should not be just seeping back into res.

I had this and it was just because of the angle of the tubing coming from the radiator to the pump.

 

[Cleeecooo]

final pic for today


The tube going from rad to res has an area which has no liquid flowing to it. Hw would I solve this??

If you have a look at the left between the rad and res you can see a bubble. I adjusted the tubing angle and it went