Model A Engine Cooling

[28ACoupe]

Hey all,

A few days ago, I mentioned that neither I nor my dad run standard cooling(water/antifreeze) in our cars.

The coolant we run is the Evans Cooling NPG+C. You use this coolant straight out of the bottle with no additives. It is anti-rust and is PH-neutral so it won't harm paint.

According to their website about the product:

Evans High Performance Coolant combines the benefits of Evans NPG+ and NPGR. NPG+c provides superior cooling protection for all gasoline and light duty diesel engines, including marine and light aircraft. In conditions ranging from -40˚ to 375˚F. High Performance Coolant provides cooling protection through constant liquid coolant contact with engine metals. Eliminates water-causing corrosion, electrolysis and cavitation. One successful installation provides cooling protection for the life-time of the engine, reducing maintenance time and expense.

When dad first got the 28 coupe, it would overheat on occasion. Most especially in parade-like situations. Once he switched to the Evans product, the car never overheated again.

When I get the coupe back on the road again, I will be running this product in my car with no hesitation or fear.


It should be noted that I am not a representative of or affiliated with Evans in any way. I am just a strong believer in their products.

[28ACoupe]

It should be noted that you do NOT run water with this product.

[28ACoupe]

I just got the official word from Evans regarding the possibility of their products attacking the paint on our cars and this is what they said, "I asked the engineering dept. about the paint issue- their advise is to treat it as you would any antifreeze spill- it will not attack the paint, but if left for an extended length of time, it could leave a "ghost" stain. Wash any spill with soap and water as quickly as possible."

[MrTube]

You say he had overheating problem before switching to Evans.

You know what really scares me?

Boils 375F @0psi


So it won't boil over until 375F but I bet the engine doesn't appreciate running at 300+F! In my opinion Evans is UNSAFE to run in a model A without a quality water temp gauge.

[28ACoupe]

You are looking at things backwards. Standard coolants boil much sooner than that and will boil out of your radiator. Because this product doesn't boil out, it stays there to keep things cool when everyone else is on the side of the road.

This product actually keeps your engine cooler than standard coolant. I have seen the results personally.

Just because it boils at a higher temp doesn't mean that the engine is going to be allowed to reach that temp.

[28ACoupe]

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Standard antifreeze boils at 231F at 0psi.

In a normal engine situation, when you are running at normal temps, standard coolant forms a vaper between the metal that is hot and the liquid coolant due to this lower boiling point. The vapor doesn't get a chance to form with the Evans coolant so the liquid is allowed to actually contact the metal directly and cool much more efficiently.

[MrTube]

Yes but my concern is when normal coolant or even straight water with a boiling point of approx 212F at 0PSI boils, it lets people without a gauge know they are running too hot and to react.

If Evans doesn't boil to almost 400F what is going to be a warning sign on an "A" without any gauge? When the engine seizes from burnt oil that has now turned into sludge?

I'm not attacking the coolant, maybe I'm wrong.

[28ACoupe]

First off, if the engine gets to 400F, you will have long since locked it up.

Second, if your cooling system is in good shape, it will never get that hot.

Believe me, the boil over point of standard coolant is one of the causes of engines overheating, not the result. When Dad was running the Evans coolant in his car, we never saw the car get over about 170F and that was running without a thermostat and with a stock radiator.

The final point on this is that the Evans coolant is a lifetime product. You never have to change it. It is anti-rust, it won't cavitation the pump due to the high boiling point, and it doesn't break down like standard coolants.

I have used this product. In my opinion, it is many times more safe than standard Antifreeze and water.

[MrTube]

It also appears to be A LOT thicker than water + antifreeze. Many people have radiators that do not flow too well and may have problems with this overflowing.

That aside as well as my concern for a temp gauge being needed they do seem to stand behind the product. They claim they will even cover damage caused on a vehicle if the manufacture denies your warranty.

[28ACoupe]

Nope, actually it really isn't any higher viscosity than standard antifreeze.

If someone has a radiator that doesn't flow well, they need to fix the problem.

[MrTube]

Originally Posted by 28ACoupe

Nope, actually it really isn't any higher viscosity than standard antifreeze.

If someone has a radiator that doesn't flow well, they need to fix the problem.

According to their chart its a lot thicker.
http://www.evanscooling.com/how-it-w...fferentiators/


However, you are right if someones radiator isn't flowing good it should be fixed regardless.

[28ACoupe]

Their chart compares to water, not the mix. The new NPG+c is new and is, according to the guy I talked to this morning, thinner than the original NPG+ formulation. I used the original formulation and I could see or feel no appreciable difference from standard anti-freeze in viscosity.

[Louis]

If an A model overheat's with 50/50, It will overheat with any other coolant you can buy, Their is no magic coolant.
50/50 is as good as their is. JMHO.

[28ACoupe]

A couple of things that you should do before you run this coolant:

1) get as much of your old coolant out of the engine as possible.
2) replace your belts and hoses and make sure your water pump is properly functioning.
3) have your radiator checked and cleaned professionally.

#1 and 2 should be done each time you change your anti-freeze anyways. It is just cheap insurance.

If you have a clean system that is working as it should, this is simply the last coolant you will ever buy.

[28ACoupe]

Originally Posted by Louis

If an A model overheat's with 50/50, It will overheat with any other coolant you can buy, Their is no magic coolant.
50/50 is as good as their is. JMHO.

Their product isn't magic, nor do they claim it to be. However, you are incorrect in thinking that your car will overheat just as fast. Yes, 50/50 works. However, this works more efficiently.

[28ACoupe]

It should be noted that I found out about this product from my cousin about 10 years ago. He was running a 650hp small block chev powered SS Impala at 11.5:1 compression on the streets of Los Angeles with no overheating issues.

Those of us who have built high performance street rods know that when you get over about 10.5:1 compression ratio, heat becomes a major issue. Pre-detenation is going to happen with standard coolant unless you run a huge radiator.

He was running a good aluminum 4-core radiator that fit in the standard SS Impala radiator spot.

[Bruce Adams]

Hi, 28A Coupe,
Thanks for the interesting posting.
so is it PROPYLENE GLYCOL as the Evans web site says?
HOW does it differ from, say Sierra which is Propylene Glycol.

Its TEN TIMES THICKER, viscosity -wise at Model A engine operating temperature than water or normal coolant, according to Evans web site.
Surprising how it passes through the Model A non-pressurized cooling system.

I wonder why the Evans web site did not mention its "Superior" Cooling properties and superior heat transfer properties compared to water or normal coolants???
Isn't THAT the property that would makes "overheating" cars like your Dads to stop overheating after using Evans?

[Louis]

Originally Posted by 28ACoupe

It should be noted that I found out about this product from my cousin about 10 years ago. He was running a 650hp small block chev powered SS Impala at 11.5:1 compression on the streets of Los Angeles with no overheating issues.

Those of us who have built high performance street rods know that when you get over about 10.5:1 compression ratio, heat becomes a major issue. Pre-detenation is going to happen with standard coolant unless you run a huge radiator.

He was running a good aluminum 4-core radiator that fit in the standard SS Impala radiator spot.

My 31 coupe only has 40hp , 50/50 works fine with me, And I don't have to change my belts and hose's every time I change my 50/50 every 3 or 4 years, I change them when they need it.

[28ACoupe]

I don't know about Sierra. I am sure you could contact Evans and ask their tech dept though.

Actually, it does mention the superior cooling and transfer properties on their site. Yes, that is why our cars run well with it.

The coupe never overheated while in dad's possession either before or after the restoration. However, it did run cooler after with the Evans product. I am very sure that some of that was due to getting the radiator completely cleaned out and like new again though.

[28ACoupe]

I am not saying that everyone should run this product. I am saying that I have run it and will run it in the future in all my vehicles. The choice is up to you.