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#3589141 - 01/05/15 01:37 PM run straight coolant - NO water
slomo Offline


Registered: 08/23/13
Posts: 164
Loc: Oklahoma
Can we do this safely? Pros and cons for why and why not please.

Seems like if we stop using water there will be no corrosion issues. Only thing left is heat transfer.

How about that Evan's Waterless Coolant?

slomo

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#3589144 - 01/05/15 01:41 PM Re: run straight coolant - NO water [Re: slomo]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Don't do it. Straight coolant doesn't transfer heat has well as 50/50 coolant and distilled water.

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#3589156 - 01/05/15 01:55 PM Re: run straight coolant - NO water [Re: slomo]
eljefino Offline


Registered: 06/15/03
Posts: 32656
Loc: ME
Evans has its place, so they claim.

You could run 70% coolant if you think there's something to it, and if your system can shed the heat despite its worse transfer abilities.

If corrosion is bad, are your grounds good or are you somehow getting electrolysis?

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#3589157 - 01/05/15 01:56 PM Re: run straight coolant - NO water [Re: slomo]
racer12306 Offline


Registered: 10/06/05
Posts: 2309
Loc: Baltimore, MD
Water is a better coolant than coolant but coolant provide the ice and corrosion protection.
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#3589174 - 01/05/15 02:11 PM Re: run straight coolant - NO water [Re: racer12306]
Hokiefyd Offline


Registered: 06/24/04
Posts: 14505
Loc: Top of Virginia
Originally Posted By: racer12306
Water is a better coolant than coolant but coolant provide the ice and corrosion protection.


Yeah, in theory you could run straight water...especially if you live down south where freezing temperatures aren't as much of a concern. I think some used to do that very thing, with a corrosion preventative additive mixed in.

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#3589176 - 01/05/15 02:14 PM Re: run straight coolant - NO water [Re: slomo]
aquariuscsm Offline


Registered: 12/30/06
Posts: 18178
Loc: Dallas,Tx USA
Doesn't coolant also lubricate the water pump?
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#3589181 - 01/05/15 02:19 PM Re: run straight coolant - NO water [Re: slomo]
MinamiKotaro Offline


Registered: 08/01/12
Posts: 1307
Loc: TN
Water is the coolant. The antifreeze is best thought of as just an additive to lower the freezing point plus provide some lubrication for the water pump.
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#3589187 - 01/05/15 02:25 PM Re: run straight coolant - NO water [Re: MinamiKotaro]
Bgallagher Offline


Registered: 04/17/12
Posts: 3159
Loc: Boston, MA
Originally Posted By: MinamiKotaro
Water is the coolant. The antifreeze is best thought of as just an additive to lower the freezing point plus provide some lubrication for the water pump.


+1
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#3589190 - 01/05/15 02:31 PM Re: run straight coolant - NO water [Re: Bgallagher]
Sayjac Offline


Registered: 10/13/08
Posts: 12273
Loc: The Old North State
...And AF/Coolant also raises the boiling point.

As for why not to do it, link seems to pretty well cover the reasons. From 1989 but reasons still seem applicable. Guess they are the reasons why I always read/heard not to.

Pure AntiFreeze Can Wreak Havoc In Car


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#3589201 - 01/05/15 02:41 PM Re: run straight coolant - NO water [Re: slomo]
slomo Offline


Registered: 08/23/13
Posts: 164
Loc: Oklahoma
Who's actually ran on straight coolant?

slomo

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#3589202 - 01/05/15 02:43 PM Re: run straight coolant - NO water [Re: slomo]
Chris Meutsch Offline


Registered: 02/27/06
Posts: 2631
Loc: Cincinnati
Originally Posted By: slomo
Who's actually ran on straight coolant?

slomo


I have. No cooling-related failures or issues in my ownership of a 1989 Mazda MX-6.
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#3589227 - 01/05/15 03:07 PM Re: run straight coolant - NO water [Re: MinamiKotaro]
Artem Offline


Registered: 10/30/10
Posts: 5117
Loc: Florida
Originally Posted By: MinamiKotaro
Water is the coolant. The antifreeze is best thought of as just an additive to lower the freezing point plus provide some lubrication for the water pump.



I think today's coolant is more then just an additive to prevent freezing.

Prestone's mixing advice shows:

50/50 coolant / water = 265F boiling point.
70/30 coolant / water = 276F boiling point.

So if water cooled better then antifreeze, wouldn't more coolant concentrate not do anything for the boiling point?

What really confuses me is Red Line Oil's Water Wetter Super Coolant additive, which states:

50/50 coolant / water = 228F
50/50 coolant / water + water wetter = 220F
water only = 220F
water + water wetter = 202F

So according to these guys, water only is better then 50/50 coolant / water mix.

I don't know who to believe so I run 50/50 mix + Water Wetter for the heck of it.
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#3589230 - 01/05/15 03:11 PM Re: run straight coolant - NO water [Re: slomo]
Kiwi_ME Offline


Registered: 10/24/08
Posts: 1019
Loc: New Zealand
I have too, 1952 Austin A40. No issues, but would never do that on anything newer, plus I think it's not optimal for the water pump seal.

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#3589232 - 01/05/15 03:13 PM Re: run straight coolant - NO water [Re: slomo]
edwardh1 Offline


Registered: 01/17/03
Posts: 2944
Loc: Coastal South Carolina
and raise the boiling point
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#3589236 - 01/05/15 03:16 PM Re: run straight coolant - NO water [Re: slomo]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
The FIRST reactor installed in the SSN Seawolf used liquid sodium as the heat transfer medium. It didn't work out and was replaced.


Edited by HerrStig (01/05/15 03:17 PM)

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