Radiator Coolant Flush - Kawasaki Versys Forum
 
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post #1 of 4 (permalink) Old 08-27-2018, 03:49 PM Thread Starter
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Radiator Coolant Flush

When replacing the coolant the service manual says to use 50% coolant and 50% "soft" or distilled water and that's what I plan to do next weekend, but I wanted to see if anyone is using 60/40? There is a Canadian YouTube video where a guy recommends it. Just curious and not saying that I approve of it.
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post #2 of 4 (permalink) Old 08-28-2018, 05:51 PM
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Bale - I don't see any advantage to doing a 60/40% mixture. From working in a gas station as a young fellow, I remember that 50/50% is good for -40F (or C - YOUR choice), and I do NOT ride at THAT TEMP (...and my V would be in the garage).

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post #3 of 4 (permalink) Old 08-28-2018, 08:11 PM
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If the bike is stored in an unheated shed and you live in central or especially northern MN I would go the 60/40 route.

My old and feeble brain remembers a 50/50 mix as being -34F, also from the gas station days.

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And most of Canada too, eh?
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post #4 of 4 (permalink) Old 08-29-2018, 08:56 AM
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Expensive cooling systems over 35 Years experience

Quote:
Originally Posted by Bale2011 View Post
When replacing the coolant the service manual says to use 50% coolant and 50% "soft" or distilled water and that's what I plan to do next weekend, but I wanted to see if anyone is using 60/40? There is a Canadian YouTube video where a guy recommends it. Just curious and not saying that I approve of it.
I worked on dry air coolers for large inverters in our Canadian climate, we did have days that went to -35, 50/50 becomes close to slush , the main thing you need to worry about is expansion and the cooling tubing failing.

There is no advantage to going 60/40, I have included several links,increasing % of glycol reduces heat transfer, ethylene glycol or propylene glycol both release the oxygen in the H2O , using premix has advantages of being distilled water and already releasing the oxygen. Never mix in a ferrous metal container and never store in a metal container, in less than a week you will have chocolate brown glycol. Most mixes are designed for use in aluminum, make sure you purchase the correct type. Glycol is not a very good heat transfer medium, increasing to 60/40 will reduce the heat transfer. At minus 35, ( C&F meet at -35), 50/50 will turn to slush, if you are in a area that goes down to -50, you may want to go with 60/40, or store in a warmer climate.
Please note to use either distilled water or de-ionized water when mixing.

This thread explains the heat transfer goes down as the glycol % is increased:
https://www.engineeringtoolbox.com/e...col-d_146.html
https://www.differencebetween.com/di...pylene-glycol/

https://www.clenair.com/sites/clenai...col_Values.pdf

https://www.carid.com/articles/antif...explained.html
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