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Can damage be done by running 100% G12 coolant instead of a mix

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Old 11-28-2004, 06:02 PM
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Default Can damage be done by running 100% G12 coolant instead of a mix

of distilled and g12?

how do i add distilled water if i have a full tank of g12 in?
Old 11-28-2004, 06:07 PM
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Default Just freeze sooner and be a little less efficient at carrying heat.

Ran mine like that for quite some time after a shop worked on the car.


Find some way to drain the system a little and top it back off. Either siphon/pump it out of the reservior, unhook a hose or pull a coolant sensor.

If you really want to do it, pull the lower radiator hose, let it drain, and start filling back up with a 50/50 mix. You'll still have more coolant than water, but it'll be a lot closer.


Should be a chart on the side of the bottle showing different mixes and the freeze temps, quite a wide range of OK mixes.
Old 11-28-2004, 06:11 PM
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u mean freeze later and stay cooler?
Old 11-28-2004, 06:25 PM
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Default Nope, pure coolant freezes at a warmer temp than a mix, and it has less heat capacity than water.

Granted you'll probably never see the temp pure G12 freezes at unless you live in canada

Couldn't find a handy chart for G12, but normal antifreeze at 100% freezes at -13C, same antifreeze with a 70%af/30%w mix freezes at -64C


If you never see freezing temps, best combo for heat transfer capability is distilled water + water wetter
Old 11-28-2004, 06:29 PM
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Default soooo is this why i see my coolant temp sensor inside my car alomost always 1 notch below normal?

and i have changed my switch twice to make sure that isnt the factor, but i bet my coolant never reaches "noraml temp" and my gauge always reads a little below center...im running 100% g12 btw....ouch
Old 11-28-2004, 06:29 PM
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Default i think the best method would be to siphon it out from the reservoir

then just add distilled water. might take 3 cycles but should work fine.
Old 11-28-2004, 06:30 PM
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Default Here's a chart for ethylene glycol, if I find a G12 chart I'll post it.

<img src="http://www.gi.alaska.edu/ScienceForum/ASF6/images/680.jpg">
Old 11-28-2004, 06:31 PM
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I had that happen, but it was a thermostat that wasn't closing :/
Old 11-28-2004, 06:32 PM
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Default what do you mean 3 cycles? how about if i just take out one full res. of g12 and stick some distill

ed h20 in it? what % do you think that i would be at then?
Old 11-28-2004, 06:33 PM
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elaborate please?


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