Ruune

I lowered my pump speed and all the foam went away! The flow into the res. was to high so the micro bubbles in the res. didn't have the time to surface and instead went back into the pump and the rest of the loop. Thanks for the help! The pump speed is usually not a solution mentioned in forums with the same issues so hopefully this will help someone else googleing around.

Yes! I found the little red screw thingy. I'll try with a lower speed to see if that helps!

Great! I've done leak testing for about 12-14 hours now and there are no leak from what I can see.. The flow seems pretty good when the system is running, the res is full and just a small small layer of foam on the top. But the second I turn the system off it starts foaming up like, alot. I know it can take time but what's wierd is that there is foam/air inside the pump, which is on the bottom of the case. Shouldn't the water pressure from the res. move the air out from the pump first? I have the D5-pump which has 5 different speeds but (I think) no way to control it since I can't enter the BIOS to change the voltage.

Can in be something then? I mean, what can cause foam to build up? Can the pump be to small to handel the loop? Can a bad fitting cause the foam/bubbles? It would be nice to know some differnet causes to troubleshoot while waiting.

Ok, I guess patience is gold, but I'm a little worried that something is wrong. So, should I run the system with the top off all the time? Or run it with the top on, stop the system, turn the case, top off, wait for (how long?), put it back on and the run it again?

Yes, I've turned the case around every angle there is

So I build my custom loop only with the CPU, no GPU: I'm confident the parts are good and the build is done well. Alphacool Pro 15 LT Res. Alphacool VPP655 CPU Block 360mm Radiator mounted in the front with in/outlets up against the case roof. 3/8" tubing Compression fittings, mostly straight but two 90 Mayhem Pastel Koolant The order is Res - Pump - CPUblock - Radiator - Res I build everything and when start filling the system I got a lot of foam and the system don't seems to "fill up" so to say, see picture. Not only in the res. but in the whole system, even inside the pump. I've bleed everything with res.top off over night but when shutting the system of the foam starts to build up again, so I guess I've a lot of air in my system. I've also noticed that the coolant enter the res. in quite high speed. Is that common? I know there are a lot of similar questions, but I've read the tips and nothing seems to help. I've tried rocking the case, pinching the tubing and start/stop. Nothing seems to help. Can a 90-fitting cause air to enter the pump? Or maybe my drain vault connected to the second outlet of the pump? Any advice?