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#3332561 - 04/03/14 05:37 PM Re: What's the best way of getting proper coolant mix? [Re: Gokhan]
Brent_G Offline


Registered: 07/12/11
Posts: 406
Loc: Aberdeen SD
IF you are that worried about being perfectly exact measure out each and mix in a larger container before filling the system.

You engine isn't going to notice or care if you accidentally get 48/52 or something.
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#3332572 - 04/03/14 05:51 PM Re: What's the best way of getting proper coolant mix? [Re: Wolf359]
eljefino Online   content


Registered: 06/15/03
Posts: 23552
Loc: ME
Originally Posted By: Wolf359
Originally Posted By: Gokhan
Originally Posted By: mrsilv04
A higher concentration of coolant has a higher boiling point... better than lower. Not sure where you got the opposite.

Of course, it has a higher boiling point and lower freezing point.

I am talking about the cooling efficiency -- how much a coolant can extract heat from the engine. Water is more efficient than antifreeze in extracting heat; so, in principle, your engine would run cooler with 100% distilled water than with an antifreeze mix. Of course, there would be little corrosion protection.


As someone else said, you are over analyzing things. Your car has fans, if it gets too hot, the fans will kick it. It's a moot point. You might save 2 cents in gas due to use less electricity to power the fans. Life's too short, just fill with water and move on. If you wanted to go nuts, make sure you use distilled water, but that would affect your savings from a going with a more efficient mix.


I spent a week flushing my cutlass ciera by simply draining the radiator. Every night I dumped the previous night's water and put new in. It ran better, less pinging, on pure water than it ever did with antifreeze. Since water conducts the heat away better it was cooling down a specific hot spot in the motor.

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#3332589 - 04/03/14 06:15 PM Re: What's the best way of getting proper coolant mix? [Re: eljefino]
sayjac Offline


Registered: 10/13/08
Posts: 7911
Loc: The Old North State
Originally Posted By: eljefino
... I spent a week flushing my cutlass ciera by simply draining the radiator. Every night I dumped the previous night's water and put new in. It ran better, less pinging, on pure water than it ever did with antifreeze. Since water conducts the heat away better it was cooling down a specific hot spot in the motor.

Well McGyver (j/k), while I personally wouldn't run pure water, that is an interesting anecdote about reducing the pinging. Never heard that one before, but an interesting result nonetheless. Since I don't want to bothered trying to find or use block drains, I usually use a similar method only using distilled water, and do it all in one day. Difference though after last drain, I fill with concentrated AF to ~50% capacity, then top off with distilled.

Running straight water wouldn't help me sleep at night. But for McGyver I could see it working out just fine.

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#3332799 - 04/03/14 09:48 PM Re: What's the best way of getting proper coolant mix? [Re: 901Memphis]
artificialist Offline


Registered: 09/23/07
Posts: 6572
Loc: Florida
Originally Posted By: 901Memphis
Guy at work insisted on filling his pt cruiser with straight antifreeze and wondered why it overheated in the winter. Now he has castor oil in there and said it doesn't over heat anymore.

My dad also made the mistake of using 100% antifreeze in his '71 Toyota Corolla.
He looked at the package of the antifreeze and noticed that 70% Antifreeze and 30% water would not boil at higher temperatures.
He then was sure 100% antifreeze was best, but he was wrong.

He said his cooling system had the worst corrosion he ever saw. He used a very strong chemical to clean his cooling system, and he truly needed it.

He then learned more about how cars work, so he didn't make mistakes in the future. He said that what he learned was that anti-corrosion additives weren't effective without water.

Anyway, I get as close to a 50/50 mix by putting a small amount of antifreeze in, then use an equal amount of water. After I do this several times, the system is full, and since the antifreeze goes in first, if I can't add water, I don't have much more than 50% antifreeze.
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#3333397 - 04/04/14 03:24 PM Re: What's the best way of getting proper coolant mix? [Re: Gokhan]
circuitsmith Offline


Registered: 12/17/09
Posts: 140
Loc: Wash, DC
Pouring concentrate into some systems can cause a problem:

http://www.agcoauto.com/content/news/p2_articleid/322
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#3333501 - 04/04/14 05:38 PM Re: What's the best way of getting proper coolant mix? [Re: circuitsmith]
Gokhan Offline


Registered: 12/29/10
Posts: 1545
Loc: Los Angeles, California
Originally Posted By: circuitsmith
Pouring concentrate into some systems can cause a problem:

http://www.agcoauto.com/content/news/p2_articleid/322

Great tip, thanks!

All set for measuring and mixing.

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#3333518 - 04/04/14 06:18 PM Re: What's the best way of getting proper coolant mix? [Re: Gokhan]
Rick in PA Offline


Registered: 01/04/03
Posts: 2066
Loc: Southeastern, PA
Antifreeze = this.
Distilled water = that.
A quart of this, then a quart of that, then a quart of this, than a quart of that... Until full.

That's how I do it. No worries about if it wasn't totally emptied.
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#3333529 - 04/04/14 06:33 PM Re: What's the best way of getting proper coolant mix? [Re: circuitsmith]
901Memphis Online   content


Registered: 08/14/10
Posts: 4892
Loc: Northern Kentucky
Originally Posted By: circuitsmith
Pouring concentrate into some systems can cause a problem:

http://www.agcoauto.com/content/news/p2_articleid/322


I've heard that but plenty of us pour straight anti freeze right into our radiators and it seems to mix just fine.

I'm sure some have coolant analysis to back up the positive mix too.
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