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Old 15-12-17, 11:55 PM   #11
littleoldman2
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Default Re: anti freeze

I cannot see why the water quality matters at all as long as it does not have anything capable of producing scale. So Softened, RO, DI, Purified or Distilled should not really make any difference. Distilled water should not contain any ions or ionising impurities at all, so should not be any different in this respect to DI water.
Don't forget modern engines do not evaporate water (and hence concentrate the impurities) like they did in the 50s, 60s and 70s.
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Old 15-12-17, 11:57 PM   #12
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Default Re: anti freeze

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Originally Posted by Bibio View Post
also try eurocarparts. they often have deals on the web with codes. any longlife 'pink' antifreeze will do the job.

whats 20 over 5 years.. burger all so best getting the premix.

i live in scotland where the water quality out the tap is superb but still buy premix.
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I cannot see why the water quality matters at all as long as it does not have anything capable of producing scale. So Softened, RO, DI, Purified or Distilled should not really make any difference. Distilled water should not contain any ions or ionising impurities at all, so should not be any different in this respect to DI water.
Don't forget modern engines do not evaporate water (and hence concentrate the impurities) like they did in the 50s, 60s and 70s.
+10.
Basic Chemistry.Way too much preciousness methinks
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Old 16-12-17, 12:17 AM   #13
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Default Re: anti freeze

Just as an aside I use the water from our household dehumidifier which has a "total dissolved solids" of 10 ppb, which is probably within the experimental error of the operator and the cheap tester.
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Old 16-12-17, 11:34 AM   #14
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Default Re: anti freeze

Bibio.....would this be ok?...https://www.eurocarparts.com/ecp/p/c...70511&&cc5_866
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Old 16-12-17, 01:18 PM   #15
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Default Re: anti freeze

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that will do nicely. its G12 compliant so same stuff as halfords and at 8 for 5ltr ready mixed you cant go wrong
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Old 16-12-17, 03:17 PM   #16
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Default Re: anti freeze

Great..thanks
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Old 18-12-17, 09:44 AM   #17
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Default Re: anti freeze

Water: Deionised is the name of the process, it doesn't (read: can't) just remove positive ions, it removes ionic materials which is basically all the things that cause scale, and any salt. The things in water that cause corrosion are, except for a tiny bit of organic acid perhaps, ionic i.e. minerals. Purified is a bit vague but it'll be deionised, distilled or RO (reverse osmosis) water, RO being the "best" but any of these will be good enough. Softened means the "hard" water metals of calcium, magnesium etc. are replaced with sodium, so you don't get any scaling of pipes/kettles but no change in ionic strength and it will corrode things more than one of the purified types of water. Water from a dehumidifier or condensing tumble drier is essentially distilled water, but might have a bit of fluff in it.
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Old 18-12-17, 10:08 AM   #18
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Default Re: anti freeze

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Water: Deionised is the name of the process, it doesn't (read: can't) just remove positive ions,
There are anions (positive charge) and cations (negative charge) that get removed, but this makes water chemically active (the dissolved solids that make water 'passive' get removed by de-ionosing process)

Excerpt from an article.

Placing the electrodes of a pH meter into a beaker full of deionized water will result in a somewhat meaningless value. This is because deionized water has a very low ionic strength (most if not all of the dissolved ions have been removed) and it is an extremely aggressive solvent when in this state.

This company (link below) warns about using deionised water in cooling systems other than ones using special metals which will resist action of the aggressive water.

http://www.lytron.com/Tools-and-Tech...eionized-Water
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Old 18-12-17, 10:47 AM   #19
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Default Re: anti freeze

The only reason that distilled or deionised are usually started is so that it's clear not to use tap water. In my neck of the woods tap water would kill the cooling system in weeks as all the timescale falls out.
Water is somewhat corrosive but doesn't need to be distilled etc to stop the corrosion. You could use tap water if you are willing to check pH balance, total dissolved solids and a couple of other things. But that's a faff unless you're running a water treatment plant.
Distilled and DI water will corrode your cooling system, but firstly you are not running pure water, you are adding coolant, and secondly the corrosion is slow. You'll sell the vehicle usually before corrosion is an issue. The bike will probably fall apart some other way first.
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Old 18-12-17, 12:43 PM   #20
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Default Re: anti freeze

Various things increase the ability of water to corrode things. If it's acidic, of course, and mineral acids tend to be stronger than organic acids. Dissolved materials such as salts or minerals are the main culprit in the modern world. The link talks about water being the universal solvent, it is, but corrosion is not a dissolution process, it's a chemical reaction on the surface of the metal. Removing things from water only makes it less corrosive. Higher ionic strength can make some things dissolve more, some things less, for what it's worth.

To be honest the quote about the pH meter is meaningless and demonstrates someone's misunderstanding of what it all means. Yes ionic strength is low but this does not mean you don't get a meaningful pH reading, you do - odds are it'd be neutral (pH of 7) as it's pretty much pure i.e. no acids or alkalis in there.
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