Coolant rant - Hyundai Forums : Hyundai Forum
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post #1 of 38 (permalink) Old 06-10-2017, 11:09 AM Thread Starter
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Coolant rant

So I am in the process of trying to get pure coolant as I just hand flush my system with distilled water.

Thought Zerek G05 would be ok...but further PI analysis says its got silicates in it. So I figure Ill just bite the bullet and get Hyundai stuff and call it a day.

WRONG. The dealer I last let work on my car says "We just use whatever green stuff we can get from the local KOI; its all the same". BULLSHIT! Asian cars use a HOAT formula and color meand diddly squat.

So now I KNOW I have to flush the entire system before I add the correct stuff because god know what the **** is in my cooling system right now. This stuff bends me so out of shape its not even funny.

I am thinking of going Honda Type 2 or ol' Fashion Toyota Red. I can get both locally.

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post #2 of 38 (permalink) Old 06-10-2017, 11:30 AM
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Okay, this has come up pretty often ...
Coolant change question

Hyundai from the factory comes with: https://www.amazon.com/Genuine-Hyund...sortBy=recent#

Thread above has alternates - of which, I would recommend Pentosin, OEM, or Zerex Asian Blue (red is fine, but doesn't match what Hyundai usually ships with).

The manual is really vague on this, my 2016 Accent says the original is good for 10-years or 120K miles, and then replace it every 2-years or 30K miles:
Mixture of antifreeze and water (Ethylene glycol base coolant for aluminum radiator)

Pretty much anything other than Sierra is going to be EG based and most anything is fine for aluminum - the newer formulations aren't supposed to be used in brass. So - Antifreeze/Coolant O'Reilly GAL - Engine Coolant/Antifreeze | O'Reilly Auto Parts - which the dealer probably used or similar is probably correct per the OM.

Personally, I agree with you and will probably change it at 60K miles and then every 60K - probably with A2 - http://www.pentosin.net/specsheets/Pentofrost_A2.pdf


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post #3 of 38 (permalink) Old 06-10-2017, 01:56 PM
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Go to AutoZone and get some Pentofrost A4, it's the same as Toyota super long-life (pink). My Toyota dealer doesn't even use the red stuff anymore.

http://www.autozone.com/antifreeze-r...mix/534410_0_0

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post #4 of 38 (permalink) Old 06-10-2017, 02:42 PM
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Peak Global is available in full strength and works great in Asian cars.
https://peakauto.com/products/antifr...full-strength/

If I had purchased G-05.... lightly silicated... I would've just used it. Its not like the mud forming coolants of the 1970's.

Zerex Asian is a great choice but only 50:50.... you already flooded all the nooks/crannies with 'water'.....same problem with the 50:50 Pentofrost A3 and A4... but I think that A1 and A2 are concentrated full strength.

My current fill is Recochem/OEM from Pepboys....
Anti-freeze, windshield wash, solvents, Global supplier of automotive liquids & household chemicals - Recochem Inc.

Toyota Red concentrate and Ford VC10a2 concentrate can also be used.
Honda/Mazda/Subaru.... are 50:50's so they're a no go after a water flush. Think that Subara LongLife(not super)is full strength and worth a check.

And, there is the much maligned Prestone that I've used 100's of times and never had a problem with, along with other all makes all models coolants:
Antifreeze / Coolant | Prestone®
Valvoline? MaxLife? Antifreeze/Coolant : Product Catalog - Valvoline®

The problem with a water flush is that you need concentrate in order to bring up all that water in the block back up to 50:50 ratio. This is why I never recommend flushing for beginners or DIY'ers. Just drain/refill the radiator, recovery/overflow bottle, with a 50:50 coolant. Repeat again if necessary and every few years. The newer Asian coolants really never need flushing since they don't crud up or leave deposits.

Napa, Walmart, Pepboys, Oreilly, Advance, and Autozone... all have a good Asian and allmakesallmodels antifreeze selection. I can usually find the Peak Global 50:50 in supermarkets and pharmacy chains in case of an emergency.

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post #5 of 38 (permalink) Old 06-10-2017, 02:46 PM
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A2 is the proper one for Hyundai's. I think A4 would work fine but I don't see why you wouldn't get the correct one if you are going for the same brand anyway.

I thought red was just the concentrate of the pink, but it isn't: https://bobistheoilguy.com/forums/ub...pics/1747873/1

Personally, the pink and most likely the A4 has sebacate, so I personally would avoid it, but ...


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post #6 of 38 (permalink) Old 06-10-2017, 02:50 PM
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Quote:
Originally Posted by deadrx7conv View Post
And, there is the much maligned Prestone that I've used 100's of times and never had a problem with, along with other all makes all models coolants: Antifreeze / Coolant | Prestone®
Agreed - the Prestone has 2-EHA (dexcool) - not recommended for Asian cars (or really anything buy GM and newer Fords), but I've used it in my 2002 Focus without issues before.


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post #7 of 38 (permalink) Old 06-10-2017, 02:58 PM
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now most of coolant are ethylene glycol based. Mixing some of common brands with different colors won't cause anything
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post #8 of 38 (permalink) Old 06-10-2017, 03:19 PM Thread Starter
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Originally Posted by camper View Post
now most of coolant are ethylene glycol based. Mixing some of common brands with different colors won't cause anything
I would not make this a public statement. Depending on the chemical makeup you may or may not have problems. I see the above statement as the same as my dealer "its all the same"...and its not. Color means nothing anymore.

I wanted to do a 50/50 with Zerex Asian because I was feeling lazy (drain, fill...have a nice day). However I was going to be around the dealer (who did a drain and fill a year ago) and figured Id price it out and found that whole we just put whatever in mantra. So yeah, I need a gallon of pure, not mixed.

So I am doing the whole flush. Not hard, just time consuming and I have to take 10+ gallon jugs of coolant/water to the recycle station. I was planning only to drain and fill once a year. But I have to do all this first to get the system back to where it should be. Other may disagree but I dont want to screw with the cooling system.

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post #9 of 38 (permalink) Old 06-10-2017, 03:57 PM
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I might get the terms wrong, but there are four main types of coolants:

https://www.hemmings.com/blog/2014/0...of-antifreeze/

- IAT - the old green stuff, okay for brass and I think it has phosphates in it. This is what your dealer was using, and is PROBABLY okay.

- OAT - basically DexCool, GM Orange, according to the article, this is PG-based, Prestone All-Makes would fall in this category. Dex-Cool has 2-EHA which is supposed to gel when exposed to air to seal leaks. I used it some in my 2002 Focus, but it had a pressurized reservoir. In a Hyundai, it could cause issues, but I don't know of any specific cases. I would avoid it if possible.

- HOAT with silicates - typically gold Zerex G-05. Typically Mercedes/Porsche/Audi/BMW - the Germans love silicates and hate phosphates, the Asians hate silicates and love phosphates. Not recommended, but doubt it would hurt anything.

- HOAT with phosphates - typically Zerex Asian, Toyota Pink, etc. This is really what you should be running in a Hyundai.
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post #10 of 38 (permalink) Old 06-10-2017, 04:58 PM
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Where in the owners manual does it state that a certain coolant tech as the only type usable?
And, what does the owners manual/factory service manual state for the type of coolant that you should be using?

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