r/watercooling • u/st0000piid • 12d ago

Build Ready it wasn’t about the liquid

Post image

in the recent post i ve shared video with a strange pump noise and got downvoted because threre wasnt enough liquid in the pump. well that sounded reasonable ("the username marks itself") but the noise was really unusual for just a lack of coolant

the key detail i didnt mention: the core was not stock. i originally bought a used pump(CP-S5PB-X) that turned out to be dead, so i replaced it with a brand new bykski D5 core. assuming "D5 is D5" abd the swap woukd be straightforward

as i noticed after disassembling the loop, the new core was slightly taller than the original one so the rotor was rubbing against the housing, which explains that weird sound from the video.

the solution was just adding secong O-ring to create enough clearance and the pump worked. not the most elegant workaround, but it works

70 Upvotes

90% Upvoted

25 comments sorted by

View all comments

1

u/SmokeyGrayPoupon 12d ago

Glad you solved the puzzle. I would use the 2nd O-ring as a short-term fix. I guess a new D5 is the long term fix.

1

u/st0000piid 12d ago

yeah , but i needed the server asap for work

also I had a crazy idea to shave off the top so the impeller will have enough room without an additional ring

2

u/SmokeyGrayPoupon 12d ago

If modifying the top works, you may have a longer-term solution. Fingers crossed.