Nissan Micra (1983 - 1992) - 88 1.0 Anti-freeze Tester scales -Eth. Glycol, Met

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Tue 5 May 2009 23:52
88 1.0 Anti-freeze Tester scales -Eth. Glycol, Met - peter973
Was topping-up the anti-freeze on my car (using standard Eth. Glycol).

Tried an Anti-Freeze tester (glass tube with float) like the battery acid testers you get.

The tester has scales for Methanol & Eth. Glycol.
The Methanol scale is above the Eth. Glycol scale on the float.

Then noticed the scales go in different directions, top to bottom or bottom to top.

-Eth.Glycol scale: -12degC is above -34degC (top to bottom)
-Methanol scale: -34degC is above -12 degC (bottom to top)

Does this make sense, as would have thought the float behaviour & concentrations of chemicals would work the same way ??
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Tue 5 May 2009 23:56
88 1.0 Anti-freeze Tester scales -Eth. Glycol, Met - bell boy
pass
tried to buy one for red last year but gave up
suggest you just get rid off all the old goo out of the system (a drain plug at the bottom of the radiator?) and go for a 75/25 mix
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Wed 6 May 2009 00:04
88 1.0 Anti-freeze Tester scales -Eth. Glycol, Met - Hamsafar
Glycol is heavier/denser than water, methanol is lighter, so they swing in opposite directions, the higher the concentrations.
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