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Evans Coolant

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Dan Wilde

Joined: 05 Jun 2011
Posts: 34

Posted: Sun Apr 29, 2012 6:18 pm Post subject: Evans Coolant

I am doing my 200 hour Rotax checklist and find that they recommend 

draining the Evans coolant, flushing with the magic fluid and then 

reinstall new Evans.  My question is why?  The Evans container says it 

is good for the lifetime of the vehicle.



I don't mind doing this but there should be a good reason.



Dan Wilde

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tomrv4(at)me.com
Guest

Posted: Sun Apr 29, 2012 7:04 pm Post subject: Evans Coolant

As an aside to this question...I have a (never been opened) gallon of Evans NPG+ coolant I bought from AC Spruce that I won't be using. Will part with it for less than half price...$15.00 plus shipping...



Tom

Rans S-7S

On Apr 29, 2012, at 9:17 PM, Dan Wilde <stolpilot.wilde(at)gmail.com> wrote:



 	  Quote: 	
		   

 

 I am doing my 200 hour Rotax checklist and find that they recommend draining the Evans coolant, flushing with the magic fluid and then reinstall new Evans.  My question is why?  The Evans container says it is good for the lifetime of the vehicle.

 

 I don't mind doing this but there should be a good reason.

 

 Dan Wilde

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rampil

Joined: 04 May 2007
Posts: 870

Posted: Wed May 02, 2012 6:10 am Post subject: Re: Evans Coolant

The chemicals in the Evans may not decompose, but the fluid does pick

up dirt and swarf over the years and should be drained every few years to

prevent clogs.



PS Are you SURE you want to be using that nasty stuff instead of DexCool?

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_________________
Ira N224XS

BARRY CHECK 6

Joined: 15 Mar 2011
Posts: 738

Posted: Wed May 02, 2012 7:40 am Post subject: Evans Coolant

That does not sound like a bad deal.  If it does pick up dirt - you are making the engine cleaner.  Where would the swarf come from?  Doesn't the manufacture clean their product before shipping?  And even if it does pick up these items - That is a good thing.. You could always filter the them out. 



Barry



On Wed, May 2, 2012 at 10:10 AM, rampil <ira.rampil(at)gmail.com (ira.rampil(at)gmail.com)> wrote:

[quote] --> RotaxEngines-List message posted by: "rampil" <ira.rampil(at)gmail.com (ira.rampil(at)gmail.com)>

 

 The chemicals in the Evans may not decompose, but the fluid does pick

 up dirt and swarf over the years and should be drained every few years to

 prevent clogs.

 

 PS Are you SURE you want to be using that nasty stuff instead of DexCool?

 

 --------

 Ira N224XS

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=372270#372270

 

 

 

 

 

 

 

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ronlee

Joined: 25 Dec 2006
Posts: 141

Posted: Wed May 02, 2012 11:31 am Post subject: Re: Evans Coolant

I vote to leave it in as the Evans manufacture recommends. It has been in my Rotax for about the same amount of time as yours and it is clear as can be. I live in the AZ desert and it cools my engine just fine. I have never overheated or had to add a drop yet. If you read about the hot spots (steam pockets around the combustion area) it can prevent in a Rotax I don't understand why anyone would want to use anything else, especially since Rotax recommends its use. If it can keep the old Ford flat head engines cool and keep the block from cracking between the valves it has to be good.

The only drawback I can think of is if it does get low on coolant to maintain its integrity Evens has to be added. I carry a pint with me. 

Remember, Ron Lee and Roger Lee are two different persons. Roger is the certified expert on Rotax engines.

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_________________
Ron Lee
Tucson, Arizona

bob(at)fly-ul.com
Guest

Posted: Wed May 02, 2012 11:57 am Post subject: Evans Coolant

On 12:31 PM 5/2/2012, ronlee wrote:

 	  Quote: 	
		  



I vote to leave it in as the Evans manufacture recommends. 


	


If one does the good ol' Rotax 5 year replacement of all rubber parts, seems to me it wouild still be best to just replace the coolant at the same time (instead of draining it into some container, where its likely to get contaminated anyway)

--

Bob Comperini

e-mail: bob(at)fly-ul.com

WWW: http://www.fly-ul.com

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rampil

Joined: 04 May 2007
Posts: 870

Posted: Sun May 06, 2012 11:18 am Post subject: Re: Evans Coolant

The debris in the coolant comes from a variety of sources including vibrational fretting of the hoses, heat and ozone induced decomposition 

of the hoses, vibrational gasket wear, wear in the water pump and other 

moving parts, oxidation of the aluminum radiator, etc.



By definition, if the hoses change at 5 years, so does your coolant.

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_________________
Ira N224XS

Dan Wilde

Joined: 05 Jun 2011
Posts: 34

Posted: Sun May 06, 2012 12:57 pm Post subject: Evans Coolant

On 5/6/2012 12:18 PM, rampil wrote:

 	  Quote: 	
		   



 The debris in the coolant comes from a variety of sources including vibrational fretting of the hoses, heat and ozone induced decomposition

 of the hoses, vibrational gasket wear, wear in the water pump and other

 moving parts, oxidation of the aluminum radiator, etc.



 By definition, if the hoses change at 5 years, so does your coolant.



 --------


	


I guess I will change it next year when I get to 5 years in service.   

If you have used Evans from the start, do you need to flush the system 

with Evans flush after replacing hoses or can you just refill with new 

Evans?



Dan Wilde

 	  Quote:

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klinefelter.kevin(at)gmai
Guest

Posted: Sun May 06, 2012 4:29 pm Post subject: Evans Coolant

You can just replace the Evans.

Kevin

On May 6, 2012, at 1:56 PM, Dan Wilde <stolpilot.wilde(at)gmail.com> wrote:

 	  Quote: 	

 On 5/6/2012 12:18 PM, rampil wrote:

> 

> 

> The debris in the coolant comes from a variety of sources including vibrational fretting of the hoses, heat and ozone induced decomposition

> of the hoses, vibrational gasket wear, wear in the water pump and other

> moving parts, oxidation of the aluminum radiator, etc.

> 

> By definition, if the hoses change at 5 years, so does your coolant.

> 

> --------

 I guess I will change it next year when I get to 5 years in service.   If you have used Evans from the start, do you need to flush the system with Evans flush after replacing hoses or can you just refill with new Evans?

 Dan Wilde

>

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