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Pump Issue and water block discoloration

post #1 of 6
Thread Starter 
I have two issues:

1. I opened up my EK GPU waterblock to find that the inside is very dark. The stuff does not seem to come off. I don't think it was like that to begin with. Want to get your thoughts. Do not see any performance drop - idle is around 34 - 35C and 100% load jumps to about 55 - 60C. The card is R9-290.



2. I had been having an issue with my pump where it makes a weird noise as if something is stuck on impeller. I contacted Swiftech and they asked me to clean the pump. When I took it apart, I noticed a spot where it appears that the impeller was grinding against the housing. The impeller appears to be sitting slightly lop sided inside the housing. I have not tested it yet, but want to know your thoughts as well. Pics attached.



EDIT: My original post on the pump with an youtube video.
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Wife's bane
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post #2 of 6
Did you use any dye in your loop?

What other fittings are in your loop?

What biocide are you using?
post #3 of 6
Thread Starter 
No dye. Distilled + drop of PT Nuke cu. Fittings are either bits power or XSPC.
Wife's bane
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GPU cooling - XSPC Razer full GPU blocks Win 7 Home Premium Asus PB278Q 2560 X 1440p ISP Logitech G15 
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Wife's bane
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i5-3570K @ 4.5 Ghz Gigabyte Z77 UD3H HIS R9-290 8 GB Samsung Wonder RAM 
Hard DriveHard DriveOptical DriveCooling
Crucial SSD for OS Samsung Spinpoint F3 Asus XSPC water block, 360 radiator, and 720 reservo... 
CoolingOSMonitorKeyboard
GPU cooling - XSPC Razer full GPU blocks Win 7 Home Premium Asus PB278Q 2560 X 1440p ISP Logitech G15 
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post #4 of 6
I had something similar happening in my waterblocks, but in a much milder form.



That did not seem to affect anything but I did notice that the black residue could be carried from the waterblocks, and then form a film inside fittings and quick disconnects. You can see some of this effect in the picture too, where there are darker stripes following the water flow.

As for the pump, I would not trust it again. Or at least test it outside the loop first.
post #5 of 6
Its a simple case of Copper oxidisation on the GPU block and the pump is dead.

All copper blocks will oxidise over time. It is not a problem other than its unsightly. It can be cleaned with a mixture of salt and white vinegar. The copper sulphate in the coolant and lack of anti corrosive has made it worse than it needed be.

The pump has worn through the graphite socket bearing on the impeller. As the bearing wears it allows the impeller to ride lower and move around more til it starts to contact the pump wall.
Edited by Jakusonfire - 10/21/15 at 12:32am
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Kusanagi
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post #6 of 6
Thread Starter 
Thank you all for your responses. +rep
Wife's bane
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i5-3570K @ 4.5 Ghz Gigabyte Z77 UD3H HIS R9-290 8 GB Samsung Wonder RAM 
Hard DriveHard DriveOptical DriveCooling
Crucial SSD for OS Samsung Spinpoint F3 Asus XSPC water block, 360 radiator, and 720 reservo... 
CoolingOSMonitorKeyboard
GPU cooling - XSPC Razer full GPU blocks Win 7 Home Premium Asus PB278Q 2560 X 1440p ISP Logitech G15 
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NZXT Hale90 V2 NZXT Switch 810 Logitech G500 Steelseries QcK 
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Optical out to Sony receiver; Deftech Monitor 3... 
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Wife's bane
(17 items)
 
  
CPUMotherboardGraphicsRAM
i5-3570K @ 4.5 Ghz Gigabyte Z77 UD3H HIS R9-290 8 GB Samsung Wonder RAM 
Hard DriveHard DriveOptical DriveCooling
Crucial SSD for OS Samsung Spinpoint F3 Asus XSPC water block, 360 radiator, and 720 reservo... 
CoolingOSMonitorKeyboard
GPU cooling - XSPC Razer full GPU blocks Win 7 Home Premium Asus PB278Q 2560 X 1440p ISP Logitech G15 
PowerCaseMouseMouse Pad
NZXT Hale90 V2 NZXT Switch 810 Logitech G500 Steelseries QcK 
Audio
Optical out to Sony receiver; Deftech Monitor 3... 
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