Author Topic: Magnesium waterpumps  (Read 266 times)

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Offline pecrazy

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Magnesium waterpumps
« on: October 31, 2017, 08:23:53 PM »
Got a couple CR's that have the dredded magnesium water pumps, just wondering if it is worth using liquid intelligence for bikes that may get ridden once or twice a year or just use distilled water and drain after ridding and leave dry.

Offline Hoony

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Re: Magnesium waterpumps
« Reply #1 on: October 31, 2017, 09:02:45 PM »
use a waterless coolant like evans i think they recommend. mine now has a billet cover to stop the rot.
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Offline Woody

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Re: Magnesium waterpumps
« Reply #2 on: November 01, 2017, 08:36:28 PM »
I used Liquid intelligence in my '83 CR and it seemed to slow the process. Like Hoony though, I ended up getting an alloy cover for peace of mind.
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Offline djr

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Re: Magnesium waterpumps
« Reply #3 on: November 01, 2017, 08:48:56 PM »
does anyone know what coolant Honda recommended when these CRs were new ?
never had one of these bikes, but if I did I would probably use a 50-50 mix of water + good antifreeze with corrosion inhibitors and drain between rides
there is a lot of mixed reviews of Evans Waterless Coolant { and similar products } some people love it, and some people  finding engines running hotter when Evans etc. are used


Offline pecrazy

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Re: Magnesium waterpumps
« Reply #4 on: November 02, 2017, 06:21:43 AM »
My DT200r runs 11 degrees hotter with liquid intelligence, ran back to back tests on the road on the same day. I compared Liquid intelligence to distilled water and coolant.

Offline djr

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Re: Magnesium waterpumps
« Reply #5 on: November 02, 2017, 10:08:51 AM »
My DT200r runs 11 degrees hotter with liquid intelligence, ran back to back tests on the road on the same day. I compared Liquid intelligence to distilled water and coolant.
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That backs up a lot of peoples results when using Evans etc. In cars & bikes , some people are getting increases a lot more than 11 degrees 
but it shouldn't be surprising as most of these "waterless" coolants are just about 100% Glycol , which doesn't transfer heat as well as water .
This is probably why motor manufacturers ( and antifreeze manufacturers) generally recommend 50/50  mixes, up to a maximum of 65% antifreeze / 35% water
Personally I wouldn't be changing anything on a bike/ car etc. Which caused it to run at a higher temperature 
( but this is just my opinion, other opinions are available)

Offline Woody

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Re: Magnesium waterpumps
« Reply #6 on: November 02, 2017, 11:28:24 AM »
I haven’t taken any temp readings or scientific proof but I would have to say that my CR ‘appears’ to run cooler with the LI than when I was running socool.
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