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post #1 of 9 (permalink) Old 09-06-2019, 07:15 PM - Thread Starter
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Unable to get radiator completely clean

I have a Hardware Labs 360 GTS radiator that I've been trying to clean and install in my loop but I'm have a lot of trouble getting it fully clean.

I used Mayhems Blitz Part 1 for the initial cleaning and I'm currently trying to flush everything. For each flush I filled the radiator half-way with distilled water and shook it vigorously side-to-side and up and down for about 30 seconds.

I've attached an image of what the flushed contents look like after about 20-30 flushes. No matter what I've tried so far these brown "flakes" still come out of the radiator in roughly the same amounts each flush.

I even tried hooking up the radiator to my faucet, running some hot water for 10 minutes, and then doing an additional 10 flushes with distilled water and it's still the same thing.

Is this some kind of corrosion in the radiator or do I just need to keep going? I've quite literally spent 2-3 hours and about 2 gallons of distilled water trying to get this thing completely clean and I see no end in sight.

Thanks!
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post #2 of 9 (permalink) Old 09-06-2019, 07:59 PM
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I know it's going to sound insane, but when I was cleaning my HL (4x480) I literately shook them hard each time I flushed it, probably 20-30 times as well, maybe even more, my arms were sore is heck, but trust me, at some point you won't see that.

This is not rust, It's the flux, just make sure when you emptying the water turn the rad upside down and sideways then keep emptying, HL rads have way of trapping water in its channels and maybe that's why you keep on seen this, but the small particles you see will eventually be gone.
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post #3 of 9 (permalink) Old 09-06-2019, 08:08 PM - Thread Starter
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Quote: Originally Posted by NewUser16 View Post
I know it's going to sound insane, but when I was cleaning my HL (4x480) I literately shook them hard each time I flushed it, probably 20-30 times as well, maybe even more, my arms were sore is heck, but trust me, at some point you won't see that.

This is not rust, It's the flux, just make sure when you emptying the water turn the rad upside down and sideways then keep emptying, HL rads have way of trapping water in its channels and maybe that's why you keep on seen this, but the small particles you see will eventually be gone.

Thanks for the info. I'm glad to know I'm not going crazy, because this turned out to be more of a workout than I had planned.

Interesting note about the channels trapping water. Guess I'll keep going until I don't see this anymore. I'm at least a little bit disappointed in the quality of this radiator as I expected more from HL and had read their radiators were some of the cleanest out of the factory.
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post #4 of 9 (permalink) Old 09-06-2019, 09:03 PM
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No, you're not going crazy. HWLabs radiators are usually quite clean but I have heard of users having a lot of flux coming out of the GTS for some reason. As NewUser16 mentioned it'll eventually all come out.

I have a HWLabs Nemesis 360GTX, I used Blitz Part 1 in it and nothing came out of it after an 8 hour P1 soak but the blue/green water. I hooked my rad up to my res/pump, filled the res up with distilled water and let it push the fluid through the rad into a bucket to help push out any trash.

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post #5 of 9 (permalink) Old 09-07-2019, 06:55 AM
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Hi,
Yeah just run hot water through it using faucet for a few hours both directions
Save the shake and bake for after with distilled water.

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post #6 of 9 (permalink) Old 09-07-2019, 10:07 AM
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Quote: Originally Posted by ThrashZone View Post
Hi,
Yeah just run hot water through it using faucet for a few hours both directions
Save the shake and bake for after with distilled water.

Me too. I run flushes through my kitchen faucet spray hose, take the sprayer off and power flush that sucker then shake out as much water as I can then I install it in the PC, hook it to a pump/res, and flush it a couple of times with distilled to get faucet water out, drain, replace with sys prep, run that, drain, flush with distilled 2 more times, fill with coolant and done.


Sounds like a lot, and it kind of is, but my arms aren't worn out afterward and I inspect my blocks regularly, I buy clear top blocks just for that purpose, and I have no debris blocking the water channels, my temps even under load (I don't OC so) never go above 50-53c on my fluid going into the rad, CPU typically runs 5-8c hotter than my fluid.

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post #7 of 9 (permalink) Old 09-07-2019, 10:54 AM
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When comes to HL radiators, they are the best you can get. Not only that they are the cleanest, despite what you see, but they are also the best performing radiators and the quality is as good as you can get.

Unlike other rads that you need to get high static pressure fans in order to get good performance with HL you can use any and I mean any fans and they will perform great.

HL radiators uses very thin fin material and 2 row of very narrow inner tubes to accommodate both silent's and performance that's why any of HL rads will hold min. of liquid oppose to some of other brands, but that can create "issue" a little struggle like you seen right now.

The tiny dual rows of tubing traps water and any crap with it, so even thou, eventually the particles will find their way out, until then you have to try to clean them as much as you can and that's why just letting water even by connecting them to sink won't get them out, you need to change direction on how you holding the rad when you emptying them, but once the particles are gone, rest assure, you will not look at any other radiator the same way

Last edited by NewUser16; 09-07-2019 at 11:29 AM.
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post #8 of 9 (permalink) Old 09-07-2019, 06:44 PM - Thread Starter
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Hey guys, thanks a lot for the suggestions. I flushed the radiator about 10-20 times more and was able to eliminate the remaining flux residue.

@NewUser16 's suggestion about making sure the radiator is completely drained of water is what I think did the trick. I don't think the tap water flushing I did actually had a significant effect. The only way to fully clean these radiators seems to be violently shaking it several times and then shaking out the water while tilting it side-to-side like he mentioned.

HWLabs does make a really good radiator. I do have another 360 GTS that had little to no flux residue and was clean in about 5 flushes. I guess I drew the short straw with this particularly stubborn one.
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post #9 of 9 (permalink) Old 09-07-2019, 06:47 PM
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next time, just go get some pool acid, water it down, flush, then flush again with baking soda,

or mayhems cleaning supplies are phenomenal.

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