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reb78

Is there an easy way to tell if I have diluted a bottle of coolant?

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I usually scribble on the tub when I dilute antifreeze so that I know I have done it. But I have two open 5l bottles of blue antifreeze and I am sure one of them is neat and one is 50% - there is a small chance they may both be neat! Is there an easy way to tell if I have diluted one?

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Measure the specific gravity (I think Wilkinsons might sell a cheap kit in the home brew section). Info can be found here on the measurements.

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Hydrometer is the word I couldn't think of!

According to the link in my previous post, the specific gravity of 100% concentration is 1.13 at 27'C or if it is 50% diluted then the SG will be 1.077 at the same temperature.

Hope this helps you.

 

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Hydrometer is of course the correct answer, as above.

Slightly more whimsically, dilute samples of both a bit more, and stick them in the freezer, see which freezes first :)

But if it were me, I'd just mix both bottles with 10L of water, and know I then had 20L of mix at somewhere between 33% and 50% which should be close enough for anyone...

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Surely the undiluted one will be a darker blue so just pour a bit from each into a glass, the darker one will be undiluted.

Mo

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Most motor factor sell Anti-Freeze Testers for determining levels of ethylene glycol anti-freeze. Example Silverline 427656 Anti-Freeze Tester.

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If you have a set of accurate scales, you could weigh 1 litre of each...

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Or... antifreeze is pretty thick, when diluted not so.

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99% of antifreeze for sale now is pre-diluted (at least from garages and supermarkets, professional may be still concentrate) -  easier to use for stupid people, but we are buying water at some inflated rate.

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Did you find out which was which in the end with your bottles of antifreeze?

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Will do tomorrow. I bought a specific gravity tool like you mentioned for a few pounds so that should tell me! (I dont know why i didnt think of it - we use them for measuring colostrum quality in cattle!)

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