Leak in the pump? Urgent!
Leak in the pump? Urgent!
Hello, everyone. I've been running this rig for quite a while. Almost 2 years ago changed from Monsoon Modular Reservoir System to this Bitspower Reservoir with MMRS casing. Due to the changes, I had to mount the pump elsewhere so mounted it horizontally. I've had zero issues whatsoever until this morning stumbled upon a small pool of fluid under my pump. Upon investigating further I noticed the pump is slowly leaking from the o-ring at the bottom part of it. After a week of troubleshooting I found that whenever I am filling the reservoir past certain limit (almost completely full), the pump starts to leak from the rear. Meaning it breaks the o-ring seal. Since then I have replaced: O-ring Rear mount of MMRS pump cover. Brought reservoir a bit lower. The last test lasted for almost 2 hours until I filled up the reservoir. Immediately it started to leak. I need a fluid dynamics expert to tell me why this is happening. I don't want to go back to MMRS because it is a pain to mount. Watercolling parts listed below: 2 rads - one on top and one on the front. EK cpu block. GPU block. D5 vario pump. D5 Monsoon MMRS cover. Bitspower hexagonal reservoir. Alphacool tubbing. EK fittings. I appreciate any help! PXL_20230209_010224093.mp4
The instructions for the D5 Pump cover...seem to be incomplete. You should verify if the leak originates from the cover or the pump itself. Check if the nylon body is cracked and whether the leak comes from the housing or the pump's main structure. Also, confirm you received the correct replacement gasket size. Look for any corrosion on the aluminum parts—mixing aluminum with copper in the same connection is never advisable.
I used the correct size for the oring. The first version looked a bit misshapen, but the replacement performed well. Testing the second version gave better results. The leak appears between the nylon casing and the pump, with about a 5mm space. Diagram 2 should illustrate this gap with fluid escaping. The pump body is intact—no bending or punctures. The nylon casing remains undamaged, and the metal "screw" casing is also fine. I swapped the original metallic screw on the casing for one I found nearby, and it functions better. What concerns me most is why the leak begins after filling the reservoir beyond a certain point. It doesn’t seem logical.
O rings serve to keep things sealed, but excessive compression can cause leaks. It might seem odd, but the threading isn’t a smooth flat circle—where the thread begins is slightly lower than the thread’s width. If you compress too tightly, it can flatten instead of filling the gap properly. A D5 works well in any orientation because its inner section stays filled with water and avoids overflow. The slow build-up makes sense since the pump generates pressure, allowing gradual release over time.
You just shared what I originally sent. The nylon might leak if it's too tight, causing the threading to come off. For quick checks, try removing a bit of the white plumber’s tape from the threads on the reel and reattach. If the leak stops, you can skip the replacement and save time.
This idea makes perfect sense. I’ll attempt to relax a bit and apply some white plumber’s tape. It should work out just fine. Thanks! I plan to check it out tomorrow and share my results.
Recent update: After applying white plumber's tape and slightly loosening the pump's grip, it began to fail after just five minutes. It started leaking. I'm planning to swap out the pump and casing, possibly opting for a Corsair Hydro X series. An EK combo sounds good, but they're too expensive for my budget.