Ok, I redid the tubing with new (tighter) clamps and fittings. No more leaks. Think I also got all the air out of the system. I’ve reassembled the G5 however it fails with a overheating error (red light next to the ram), all fans spin up, and ASD says “failed to communicate with CPU0 and CPU1”...
My rebuild LCS comes along nicely. However, still getting tiny leaks around the hose barb fittings. Anyone else experiencing this? I used Alphacool ones but the o-ring doesn’t seem to fully screw into the top for a snug fit.
Thanks got it! Somehow both o-rings were still stuck in the old Delphi tops and I didn’t notice.. I even almost threw those in the trash already. Seems to be sealed now.
Currently working my way through this guide as well for my Quad G5. Thanks so much for writing this @CircuitBored . I'm on exactly the same steps as you are @Amishallin. However, when I started to fill up the LCS system with fresh coolant, both pump tops started to leak back here (see photo)...