Would be shockingly bad quality from EK

Would it really be though?

Only thing I can think to check is to maybe reseat the impeller and make sure that didn't get messed up, but otherwise, yeah something is way wrong there.

 

Don't know much about the internals of pumps. So you want me to detach and reattach the impeller fan?

 

maybe wait for EK support to get back to you before bagging them on this forum?

 

I know, I'm just saying that I'm shocked.

 

Maybe crap from your chiller got into it? Open it and check.

 

The impeller just pulls right off the shaft after you remove the screws to the pump housing. I've had D5s fail quickly; for whatever reason they start to move off center and hit the pump housing which starts chewing up metal and makes it worse. The one in my "old' rig is about 2 years old and it's still going strong but I've had 2 fail way earlier than that (1 probably only made it 3 or 4 months).

 

So it's just a common issue with D5 impellers? Perhaps I should be building with the expectation that these D5 pumps will fail...

I wonder if it's possible to plug up the dualtop so that I can take apart the pump without it pouring out water.

 

You may have caught it in time , tear it down and recenter the impeller, there is nothing to them, and make sure everything it fine, I had one do this and it was easy to fix , just don't run them like them like this or they will chew themselves up pretty quick

 

Check out the video below and you can see how easily the impeller removes and reinstalls. I wouldn't say its common for D5's to fail. I have some that are 12 years old. Its just that every now and then it's possible for some debris or something in the loop to get stuck in the impeller and that upsets the balance and it hits metal on metal. That's why I am suggesting just checking it out. Often times that's the problem with the pump, clear the debris, reseat the impeller and should be good. If still broken after that, then probably yeah a bad pump. If not, then should be good.

Yeah, I caught it live and immediately stopped it, only plugging it back in for a few seconds just to test the noise and record it.

When you say recenter/reseat, do you mean do something like this? D5 Pump Impeller Replacement

Where you detach the impeller, clean it up a bit, stick it back in, and test its ability to turn smoothly?

 

When you get it together prime is slowly by turning it on until it starts to spin and turn it off, repeat this step several times just to make sure its not going to cavitate, that's what throws them off sometimes

 

So, after I reinstall the impeller and pump onto the dual top, cycle the power on/off for it so to help get out any air bubbles and lessen the possibility of cavitation?

 

YES , I use a separate power supply just for bleeding the system so I can do this , otherwise you have to pull the 24 pin MB cable so your system wont post while you short cycle the pump, it just helps so it wont cavitate

 

Def sounds like a misaligned impeller. Easy to take off and inspect.

 

I had two D5 pumps fail in the EK dual revo within the 2 year warranty period. EK replaced them each after I sent in a video, but I'm guessing the design doesn't deal with vibrations well which leads to premature wear and failure. I had D5's in an old Koolance duel pump reservoir last >8 years no issues as others have noted.

 

Yeah they aren't all necessarily built to the same standard. My 12 year old ones are Swiftech and still solid.

 

I replied to your Reddit post about this issue, and let me repeat it here:

How are the pumps getting water? From the looks of it the reservoir isn't on top but rather on the side somewhere, possibly below the pumps? If this is the case it might be a huge air lock and one of your pump just isn't getting enough water into it (wild speculation)

 

Water's fed into it from an external D5 pump beforehand; the entire PC is saturated with water, including the D5 dualtop.

 

hmm swiftech MCP655 d5 pump + XSPC res ,mine is 12 years old, again bad sound,you must be very unlucky

 

Yeah? My DDC3.2 with Petra's top is probably older.

 

I had a D5 fail like that. In my case the bearing/bushing in the impeller wore out and caused it to vibrate badly. Some of the impellers are balanced with small weights (I've had one that didn't, not sure how it was balanced) which can fall out also.

EK will RMA it if you want to go that route. But it's cheap to buy a new impeller from AliExpress.

https://www.aliexpress.us/item/2251832640368454.html?spm=a2g0o.order_list.order_list_main.10.21ef1802yzd5Ed&gatewayAdapt=glo2usa&_randl_shipto=US

I just bought a couple of them so I'd have replacements on hand.

Obviously take it apart first and make sure there isn't gunk stuck in it as someone else suggested already.

 

Thanks, I'll check it out.

To everyone: EK got back to me, but is giving me a hard time. Typical loops you'd expect from meh customer service who want you to try stuff before sending out a replacement. Says my video isn't adequate and wants me to retake it. Thoughts?

 

Dude, just send them and recieve a new part. You over-complicate simple things.

 

I'd like to, but they're not helping =|

 

Is it on a loop with your used chiller that you were trying to clean in that other thread? Most likely explanation would be that gunk from the chiller ended up in the pump, especially if it's the first pump after water exits the chiller.

Second explanation is it's defective. Either way, open the pump and look.

 

Nah, this D5's in the PC, which is away from the chiller and split off by an inline filter. The chiller reaches the external D5 first in the loop before anything else. And it goes through the MO-RA straight after that.

I'll take a look inside then, before proceeding with the RMA.

 

Yea that's a worn out bearing/bushing. Just need a new one either from EK or just get one of the AliExpress impellers I posted. They work fine. I've got one in service. By the time you pay for shipping to EK (I assume you would have to), just as well get the new impeller. That's what I ended up doing.

 

I'm shocked. Hopefully they don't now tell you that the impeller is indeed bad, but won't warranty it because you opened it.

With those pics I would expect that they will replace it for you without any hassle.

Proceeded on with the RMA. Let's see how they respond.

Somehow the carbon ceramic bearing is destroyed. Have you hit / dropped the pump while still in operation or the impeller is hitting the top cover?. Because from the pictures is missing a big piece.
I have 15yr old D5 that still working fine and they have minimal wear in the bearing

No. No physical damage by me whatsoever.

 

Somehow the carbon ceramic bearing is destroyed. Have you hit / dropped the pump while still in operation or the impeller is hitting the top cover?. Because from the pictures is missing a big piece.
I have 15yr old D5 that still working fine and they have minimal wear in the bearing

 

The one I had wear out was just like that, although not as severe. Only had it a few months.

 

@Ichirou
you can buy the impeller on aliexpress..I had that happened to one of my D5's and I just bought the impeller assembly off Aliexpress and its done!!

 

i would spend the 15 on the new impeller. or you can pay shipping to send it to ek for them to do it for you i guess. really the difference is time .

 

Yeah, I'm not expecting a lot from EK. It's more that if they are willing to offer a replacement for free, I'll obviously take it.
But if they're gonna charge me in any fashion (e.g. shipping) without reimbursing me, I'm not gonna bother.

 

EK has usually done the right thing once they commit to doing something about the issue. I would be surprised if they didn't do a full replacement at no cost at this point. Hope it works out that way for you.

 

So out of curiosity, while I'm dealing with getting a replacement for the impeller, how often do these impellers break down? Especially in the way that happened for me above, where it's simply beyond repair? Or is it completely random? Are there methods of limiting potential cavitation besides cycling the power to the pumps?

 

So out of curiosity, while I'm dealing with getting a replacement for the impeller, how often do these impellers break down?

Pretty rare. There's usually no reason for them to break down at all unless there is debris of some sort in the loop that gets stuck in the bearing and tilts them off balance, or something was inherently broken with it to begin with when new.

 

Photo of your pump locations?

 

Well, I think I might be going through a different problem now. I think some parts of the impeller might've broken off and jammed my flow meter. Because now it's just showing as 0 L/h, and it feels like the other half of the loop in the PC is just hot while the other side is cold. @ciarlatano

 

It's a possibility. What flow meter is it? Are there visible missing pieces from the impeller?

 

I remember spending hours on internet, to choose the best D5. Originals where super expensive. 755 are trash.....

I finally went for a Aqua computer. +-4 years so far so good.

 

But the 755 is not a D5, nor is it a Xylem/Laing product.