Evans Waterless Coolant
Melting Slicks
Joined: Jun 2014
Posts: 2,236
Likes: 498
From: NJ
Read about this years ago, but I seem to remember that this stuff requires a stronger water pump to circulate the coolant. Basically a water pump with more head pressure. Never used it because of the pump requirement. I wonder if that's changed now?
Le Mans Master
Joined: Nov 2016
Posts: 9,264
Likes: 951
From: Lake Tahoe, CA
I have to say Greg I saw one post here on CF that swears by it another on Amazon swears by it and when I finish my build I may even choose to use it.
Call Evans and speak with a tech for prep as to how to use it.
Only one way to find out.........use it.
Good luck
Call Evans and speak with a tech for prep as to how to use it.
Only one way to find out.........use it.
Good luck
Pro
Joined: Mar 2014
Posts: 529
Likes: 113
From: Texas
Pro" No corrosion in radiator, block, heads, intake manifolds, heater core, heater control value. Extends life of hoses, and water pump. Uses oem parts. I always recommend a up graded radiator and water pump but it works fine with the stock parts.
Con" You have to remove all water and coolant, and it is not cheap.
They sell a flush to remove the old coolant and any remaining water.
https://www.evanscoolant.com/
Con" You have to remove all water and coolant, and it is not cheap.
They sell a flush to remove the old coolant and any remaining water.
https://www.evanscoolant.com/
Race Director
Joined: Oct 2019
Posts: 10,735
Likes: 63
From: Deep in the Pisgah National Forest
The specific heat of water is very high, about 4200 J/kg K, which makes it so good at transferring heat. That's about 60% more effective than this stuff, and 75% more effective than pure antifreeze.
https://www.evanscoolant.com/Custome...og_hi_perf.pdf
https://www.evanscoolant.com/Custome...og_hi_perf.pdf
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
Pro" No corrosion in radiator, block, heads, intake manifolds, heater core, heater control value. Extends life of hoses, and water pump. Uses oem parts. I always recommend a up graded radiator and water pump but it works fine with the stock parts.
Con" You have to remove all water and coolant, and it is not cheap.
They sell a flush to remove the old coolant and any remaining water.
https://www.evanscoolant.com/
Con" You have to remove all water and coolant, and it is not cheap.
They sell a flush to remove the old coolant and any remaining water.
https://www.evanscoolant.com/
The specific heat of water is very high, about 4200 J/kg K, which makes it so good at transferring heat. That's about 60% more effective than this stuff, and 75% more effective than pure antifreeze.
https://www.evanscoolant.com/Custome...og_hi_perf.pdf
https://www.evanscoolant.com/Custome...og_hi_perf.pdf
Again, I don't see any benefit for the cost to convert.
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Race Director
Joined: Oct 2019
Posts: 10,735
Likes: 63
From: Deep in the Pisgah National Forest
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
I never use this stuff for the same reason I don't use Dot 5 brake fluid.........
1) The system has to be flushed and cleaned or new to use it....
2) It does not do anything better than the regular stuff if all of the components are function 100%
3) It does away with the chance of some ******* mixing the regular stuff into your high rent cocktail....
4) You can get distilled water anywhere.....you can get Evans coolant from people who sell Evans coolant....and I have yet to see a jug anywhere in real life.
Big fat nope.
Jebby
1) The system has to be flushed and cleaned or new to use it....
2) It does not do anything better than the regular stuff if all of the components are function 100%
3) It does away with the chance of some ******* mixing the regular stuff into your high rent cocktail....
4) You can get distilled water anywhere.....you can get Evans coolant from people who sell Evans coolant....and I have yet to see a jug anywhere in real life.
Big fat nope.
Jebby
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
The coolant can [and DOES] alter the operating temperature of the engine. The coolant, and its properties, define how well heat is transferred to the radiator fins. Less heat transfer, less cooling capability. If the radiator has an excess of cooling capability, that will prevent a lot of cooling issues.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
The thermostat controls the heat of the engine because its a valve that operates by temperature. The radiator just cools the coolant and the stat opens when it needs cooler coolant and closes when it doesn't. Irrelevant how fast or slow which coolant sheds its heat to the rad. The engine temperature will still be 180* whether its water, 50/50, Evans or mercury.
Thread Starter
Just another Corvette guy
Joined: Feb 1999
Posts: 8,518
Likes: 3,865
From: Palm Springs, CA.
Here is a quote from their website:
"As it heats, water generates high vapor pressures that exert internal stress on cooling system components. When the engine cools, the pressure reduces. This repetitive process often leads to fatigue and component failure.
Because Evans waterless coolants have a boiling point of above 375°F and will not vaporize within the cooling system, they generate such low vapor pressure that you can remove the radiator or expansion bottle cap while the engine is running.
This pressure reduction eliminates internal stress on hoses, pump seals and radiator seams, thus extending operating life by many years and preventing breakdowns."
I am just examining all avenues. My '65 350hp 327 runs warm here in traffic due to the triple digit ambient temps. All is good under the hood, engine is freshly rebuilt, new water pump, new aluminum rad, auxiliary electric fan, correct shroud with all seals in place. It's just that daytime temps are often over 100 degrees. If I drive over in L.A. where temps are in the 80/90's, never have a problem.
Came across this Evans Waterless Coolant on a few different forums so I'm looking for feedback from any Corvette owners who may use it. Downside, it is very expensive. About $30 a gallon for their system flush so that's about $120. Then it's $50 a gallon for the waterless coolant, another $200. So this is approx. $300-$350 to change up.
Last edited by Greg; May 19, 2021 at 05:15 PM.
Melting Slicks
Joined: Jun 2014
Posts: 2,236
Likes: 498
From: NJ
The specific heat of water is very high, about 4200 J/kg K, which makes it so good at transferring heat. That's about 60% more effective than this stuff, and 75% more effective than pure antifreeze.
https://www.evanscoolant.com/Custome...og_hi_perf.pdf
https://www.evanscoolant.com/Custome...og_hi_perf.pdf
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
So what? The bubbles are quickly swept away by the flowing coolant and the engine temperature remains normal. It does excel in the cost to buy it.
Melting Slicks
Joined: Jun 2014
Posts: 2,236
Likes: 498
From: NJ
Yes they do get swept away and more bubbles take it's place and the cycle just goes on and on. The point is you don't have heat transfer where the air bubble sits. Air is an insulator.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
Bubbles can only form if the cylinder walls/heads actually get hot enough to boil the coolant. But that's the purpose of the coolant i.e. keep the cylinder walls/heads cool to prevent bubbles from forming and sweep them away if they do. Its continuous so not a problem. Again, Evans is not bringing to light anything the engineers didn't know already and have dealt with it. Marketing hype to lure folks in. If it was REALLY good, the car makers would use it and pass the cost off to us. But they don't use it because 50/50 works just fine.
Melting Slicks
Joined: Jun 2014
Posts: 2,236
Likes: 498
From: NJ
Bubbles can only form if the cylinder walls/heads actually get hot enough to boil the coolant. But that's the purpose of the coolant i.e. keep the cylinder walls/heads cool to prevent bubbles from forming and sweep them away if they do. Its continuous so not a problem. Again, Evans is not bringing to light anything the engineers didn't know already and have dealt with it. Marketing hype to lure folks in. If it was REALLY good, the car makers would use it and pass the cost off to us. But they don't use it because 50/50 works just fine.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
Likes: 1,213
From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
The combustion temperatures do get hot as you say. But how much of that heat is transferred to the cylinder walls/heads? They are already being cooled by the coolant on the other side in the coolant passages. And then an instant later, there is a cool intake charge coming into the cylinder. So yeah, 4500*F looks pretty darn hot but the cylinder walls/heads won't get anywhere near that hot because there just isn't enough time to transfer that heat. Melting point of cast iron: 2200*F, aluminium: 1220*F. The engine should be melting, lol. A lot of the heat is blown out the exhaust into the headers and pipes. Evans does have its place just like 100% nitrogen in tires vice 80%. But not for normal street driven cars. There are benefits but the benefits are far greater in specialized applications.
Last edited by resdoggie; May 20, 2021 at 10:58 AM.