Changing to Evans Non-Water Coolant - LotusTalk - The Lotus Cars Community
 
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post #1 of 6 (permalink) Old 08-25-2014, 09:57 PM Thread Starter
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Changing to Evans Non-Water Coolant

Hello Everyone,

I've been wanting to switch to Evans for a long time, as it works great in our race car, and should be a no-brainer on the street. It would also bring corrosion to an end.

But I have some questions.

First, has anyone done this? Forum searches did not turn up any results for me.

Second, the effectiveness of Evans requires less than 3% water in the entire system to be effective. They have a hygroscopic fluid which absorbs residual water, but there's no way it is designed for, say, a liter of it.

Which brings me to my problem....

Has anyone figured out how to drain the heater core?

The only solution I can figure out is to perform multiple flushes at temperature with the Evans solution, and measure the results with a refractometer until it gets under 3%. But getting the water/glycol out of the heater core is the major issue, I believe.


Any help, insights, and advice is much appreciated,

Stephen.

'A socialist is somebody who will take your flat-screen TV and give it to a family of meth addicts in the backwoods of Vermont.' P.J. O'Rourke

[B][I]2005 Lotus Elise, Laser Blue;2003 BMW M5;2005 JCW Mini Cooper Challenge (Race Car; 2007 Champion);2004 Acura (Race Car; 2011-2012 Series Champion);
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post #2 of 6 (permalink) Old 08-26-2014, 03:32 AM
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I looked into this a couple of years ago and eventually contacted Evans directly to see if it could be done on an Elise. Unfortunately a tech there told me the only way it would work would be to completely disassemble the entire cooling system to be able to effectively clean it out and eliminate the residual water. Being not willing to take apart my car's entire cooling system just to replace the coolant, I am still running with water based coolant and changing it out every two years.
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post #3 of 6 (permalink) Old 08-26-2014, 04:33 AM Thread Starter
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Quote:
Originally Posted by tesprit View Post
I looked into this a couple of years ago and eventually contacted Evans directly to see if it could be done on an Elise. Unfortunately a tech there told me the only way it would work would be to completely disassemble the entire cooling system to be able to effectively clean it out and eliminate the residual water. Being not willing to take apart my car's entire cooling system just to replace the coolant, I am still running with water based coolant and changing it out every two years.
Well, that's that, I guess. I was going to call them also. I assume it was the heater core where the residual water could not be eliminated. Thanks for the information.

Stephen.

Edit: On the other hand, there might just be a way....time for research and thinking. I'll call Evans just to bounce some ideas off him.....S.

'A socialist is somebody who will take your flat-screen TV and give it to a family of meth addicts in the backwoods of Vermont.' P.J. O'Rourke

[B][I]2005 Lotus Elise, Laser Blue;2003 BMW M5;2005 JCW Mini Cooper Challenge (Race Car; 2007 Champion);2004 Acura (Race Car; 2011-2012 Series Champion);
1974 Lotus Europa TC Special (sold, for marital harmony);1974 BMW Bavaria;1973 BMW 3.0 CS; Wife's Car - 2012 Mini Cooper...

Last edited by lighterthanair; 08-26-2014 at 05:01 AM.
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post #4 of 6 (permalink) Old 08-26-2014, 04:19 PM
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How much would a new heater core cost?

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post #5 of 6 (permalink) Old 11-17-2014, 12:10 AM
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Unplug the heater pipe and stick a compressor nozzle in it (seal with your hand), then blow the contents into the rest of the cooling system while the lower rad hose is off on the motor. It'll should push out the whole system...
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post #6 of 6 (permalink) Old 11-17-2014, 02:58 AM
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bit of thread resurrection there!!

Given that the Elise isn't short of cooling capability the reward-for-effort just isn't there to justify the switch IMHO
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