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Discussion Starter · #1 ·
Loops been running for about 2 months now I never noticed it until about a month ago.

The rest of my loop is still crystal clear.

Running mayhems X1 clear concentrate. Cpu gpu and vrm block are nickel plated copper. Fittings are dark side/barrow(brass I believe). Tubing is bitspower petg. I did clean my tubing, rad and fittings but not my blocks before filling.

Any ideas what this stuff could be?

Some pics here



 

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Most likely leeched oil from the EPDM gasket. This is unfortunate as it is not aesthetically pleasing, however it is harmless to your system.

I would recommend dissasembling it and wiping it off. You can contact EK Support for further instructions if required: https://www.ekwb.com/customer-care/

And again, sorry for the inconvenience caused
mad.gif


Regards,
Niko:thumb:
 

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I also recently noticed this yellow goop leaching from the gaskets of my Asus Apex monoblock...

I initially thought it was some reaction with the coolant, then it also occurred with distilled water.

The yellow goop starts leaching into the system once the system is stressed and coolant temp rises, and can be seen sticking on to other surfaces as it travels downstream from the source.

It is exacerbated by the fact that the Asus Maximus IX Apex monoblock only comes in Plexi/Nickel, couldn't even choose the acetyl version to hide it, the contamination just looks disgusting.

I have already opened up and cleaned the monoblock 4 times in the past week, until I realized it was a losing battle to keep the block pristine.

EK, it is frankly unacceptable to put out a product that leaches crap when using it as designed. The gasket material/supplier will have to be changed.

I have also noticed that the gasket has become stiff and sticky/tacky, as if it is breaking down.

Please let me know the diameter of the gasket used in the Asus Apex monoblock, so i can source some quality gasket to fix your product.
 

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Discussion Starter · #4 ·
Hi Niko,

Thanks for the response. So just to clarify and help me understand, why is this happening? From your response I almost get the feeling that you are saying that it is suppose to happen.....

Also from Windeh's response he states that it continued to happened even after he cleaned the block out. Is this problem going to persist?

Thanks
 

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Hi jogfalls,

the EPDM rubber comes soaked in a mixture of mineral oils and sometimes there's a discrepancy in the raw material batches from which the gaskets are moulded. When compressed, the oils may leak from the surface of the material.

Unfortunately it is very hard to control and trace the composition of EPDM rubber of each batch. Unlike metals, rubber has much much broader specification tolerance, especially for automotive / industrial use.

This is not supposed to be happening on such scale. Please guys, contact our RMA department and they will send you out replacement orings at your wish. We're doing a lot of internal testing with different stiffness of rubber and different rubber profiles to mitigate these rare occurrences.

Hope this help.
Regards, Niko!
 

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The yellow goo is back after the 4th cleanup almost 2 weeks ago;







I have 2 MSI 1080Ti Blocks and a Memory block in Acetal in this loop, can't imagine what they look like inside now...



EK seems to be downplaying this issue, and ignoring my post above. This is no longer an isolated case, and as more and more people discover that their block is leaking gunk, hopefully EK will have a more serious solution to fix their product then to ask the end user to open up their block for cleaning.

Quote:
Originally Posted by EK_tiborrr View Post

This is not supposed to be happening on such scale. Please guys, contact our RMA department and they will send you out replacement orings at your wish. We're doing a lot of internal testing with different stiffness of rubber and different rubber profiles to mitigate these rare occurrences.

Hope this help.
Regards, Niko!
Can we have guarantee that the replacement will no longer leak the yellow gunk?
 

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Quote:
Originally Posted by EK_tiborrr View Post

Hi jogfalls,

the EPDM rubber comes soaked in a mixture of mineral oils and sometimes there's a discrepancy in the raw material batches from which the gaskets are moulded. When compressed, the oils may leak from the surface of the material.

Unfortunately it is very hard to control and trace the composition of EPDM rubber of each batch. Unlike metals, rubber has much much broader specification tolerance, especially for automotive / industrial use.

This is not supposed to be happening on such scale. Please guys, contact our RMA department and they will send you out replacement orings at your wish. We're doing a lot of internal testing with different stiffness of rubber and different rubber profiles to mitigate these rare occurrences.

Hope this help.
Regards, Niko!
Spent days putting loop together. Started leak test the night before, the oil came out. Spent a whole day to remove the block, clean up and put everything back. The monoblock is a pain in the butt to assemble.
 

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I am dealing with the same thing you all are. I just got a Monoblock for my ROG Crosshair Hero IV, just like WildWind said, I spent days working on this loop with, filled the loop to do a leak test and within 24 hours I now have brown discoloration showing up in the below marked area on the block.



@EK_tiborrr I just want to make sure that I understand this, and please understand that It is not my intent to come off harsh just blunt so I know what steps to take.

1. I can drain my system, disassemble the block and clean off the brown marks, reassemble, re-fill the system and wait 24 hours in hopes that the brown will not show up again, if it does, repeat all steps all over again.

2. Contact EKWB and request for a new O-ring. Wait an unknown length of time to receive the ring, drain my system, disassemble the block, clean brown spots, replace o-ring, reassemble, refill system and wait 24 hours in hopes that the brown spots do not show again because as you mentioned
Quote:
very hard to control and trace the composition of EPDM rubber of each batch
so there is a good chance that we might receive a replacement O-ring that is going to have the same issue.

I love EKWB products but this is just a downer when you spend so much time building a loop only to have something like this that is totally out of the builders control happen resulting in system draining and no guaranteed fix unless you get lucky with a good O-ring. When I ordered my mono block EK told me that they are built per order and not just sitting in stock on a shelf so why doesn't EKWB look at filling these mono blocks for 24 hours to see if the O-ring meets your standards?
 

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My 1080ti block. Same thing seems to be happening.
 

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My Monoblock for ASUS Rampage VI Apex ( Intel X299 Platform) is also starting to leak oil within an hour of starting to leak test?

ofymnn.jpg


EK_Tiborrr any update on a permanent solution ? You said these are rare occurrences, so is it possible that a new rubber gaskets are going to fix the issue ? Or is it always going to be the luck of draw? Any place where there are detailed instructions on how to open up these monoblocks, do maintenance and put them back in together ?
 

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Had this on a EK ThreadRipper Plexi/Nickel block, purchased at launch. Was going to take apart loop and clean, never got around to it. Now seems to have disappeared. I use distilled water with ~20% mix of Mayhems XT-1 Clear concentrate. Viewing coolant in reservoir seems as clean as initial fill, not noted any difference in temps of CPU, etc either over the course of usage.
 

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The same is happening with my Supermacy EVO and Aorus 1080ti waterblock...I literally don't have strength to do RMA for every broken thing I bought.So faulty fittings and blocks leeching oils I just trow in garbage and buy new ones,because it's cheaper.(when you calculate shipping,VAT,Customs taxes back and here,it really is)
Nevertheless,you can always put your GPU in horizontal position like I did,and that won't be visible(because they don't sell my GPU model anymore) and for Supermacy,try painting acrylic top.
frown.gif

After all,the most important thing is that it doesn't affect cooling-that's what I'm telling myself:)
P.S this is happening to every manufacturer,because they all use the same production technology
 

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Hi,
Yeah pretty wild and loose assembly practices by EK
No plugs on anything rad/ blocks/ pumps/.....
Not very impressed.
 

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Old thread but I just begun leak testing and momentarily I freaked out when I saw some brow bubbles on my Asus Rampage VI monoblock.
In fact I connected an in-line filter to the loop while testing so that I can catch any wandering crap that might be lurking in any of the parts and then I noticed some yellow / brown spots on the filter.

Then I hit google and bumped on to this thread. The good thing is that it is harmless but looks bad!!!

I hope that I can capture most of it on the filter because I am not going to disassemble the block right now. I need the PC for work as soon as possible.

If you look at the second image on the filter the yellow/brown spots are this stuff.
 

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