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run straight coolant #4674320
02/22/18 11:43 AM
02/22/18 11:43 AM
Joined: Aug 2013
Posts: 217
Oklahoma
slomo Offline OP
slomo  Offline OP
Joined: Aug 2013
Posts: 217
Oklahoma
Who has done this?

Re: run straight coolant [Re: slomo] #4674324
02/22/18 11:46 AM
02/22/18 11:46 AM
Joined: Dec 2005
Posts: 10,328
Upper Midwest
kschachn Offline
kschachn  Offline
Joined: Dec 2005
Posts: 10,328
Upper Midwest
Why would you want to so this? In general, heat transfer is compromised compared to a water mixture, as is freezing point. Most automakers specify a maximum concentration and there's a reason they do so.

For reference here are a few threads on waterless coolants, including one you started a year or two ago:

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4338324/Waterless_Anti-freeze#Post4338324

https://bobistheoilguy.com/forums/ubbthreads.php/topics/4038277/Evans_waterless_coolant#Post4038277

https://bobistheoilguy.com/forums/ubbthreads.php/topics/3699927/Waterless_coolant#Post3699927

https://www.bobistheoilguy.com/forums/ub...ant#Post4491106


1994 BMW 530i, 238K
1996 Honda Accord, 266K
1999 Toyota Sienna, 407K
2000 Toyota ECHO, 280K
Re: run straight coolant [Re: slomo] #4674326
02/22/18 11:46 AM
02/22/18 11:46 AM
Joined: Feb 2016
Posts: 686
NJ, USA
MotoTribologist Offline
MotoTribologist  Offline
Joined: Feb 2016
Posts: 686
NJ, USA
What do you mean by coolant? Are you referring to water?

Re: run straight coolant [Re: slomo] #4674329
02/22/18 11:48 AM
02/22/18 11:48 AM
Joined: Mar 2017
Posts: 683
West Ma.
rollinpete Offline
rollinpete  Offline
Joined: Mar 2017
Posts: 683
West Ma.
50/50 for me


Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive185k miles
Last Change;
50/50 QSUD, QSHM. 5w30
Fram XG8A, Fram CA8141

Currently under the influence of oil shocked2

Re: run straight coolant [Re: slomo] #4674343
02/22/18 12:00 PM
02/22/18 12:00 PM
Joined: Jan 2006
Posts: 1,144
Ohio
Dave Sherman Offline
Dave Sherman  Offline
Joined: Jan 2006
Posts: 1,144
Ohio
No, because it would be expensive and pure coolant does not transfer heat as well.


2015 Honda Pilot EX AWD Valvoline 0W-20 Bosch filter
1977 MG Midget Valvoline VR-1 20W-50 Bosch Filter
Re: run straight coolant [Re: slomo] #4674351
02/22/18 12:05 PM
02/22/18 12:05 PM
Joined: Feb 2009
Posts: 225
NY, USA
windeye Offline
windeye  Offline
Joined: Feb 2009
Posts: 225
NY, USA
No one should be doing this. Aside from the reasons mentioned already, straight (near 100%) coolant actually has a much higher freezing point than 50/50 mixed with water. Use de-ionized water or distilled water, or buy premixed from dealer.


2000 Mazda MPV LX, 202,500 miles
2007 Mazda 3 Touring, 112,800 miles
2013 Toyota Camry XLE, 100,800 miles
Re: run straight coolant [Re: slomo] #4674367
02/22/18 12:21 PM
02/22/18 12:21 PM
Joined: Aug 2017
Posts: 164
Displaced Texan in Mexico City
Gimpy1 Offline
Gimpy1  Offline
Joined: Aug 2017
Posts: 164
Displaced Texan in Mexico City
Never run straight coolant it doesn't transfer heat very well. Ideally straight DI water is the best coolant due to its ability to absorb heat, however using pure water leads to lubrication and oxidation issues. Most race tracks especially for motorcycles ban the use of coolant and will check you radiator to pass tech they only thing allowed is water wetter (purple ice or redline water wetter for example)
Question is why would you want to do that, just run what the OEM recommends, don't try to out think the automotive engineers, they test vehicles in severe conditions for a reason, plus running 12 or 14 quarts of pure coolant is way more expensive than diluting it.

Re: run straight coolant [Re: windeye] #4674369
02/22/18 12:22 PM
02/22/18 12:22 PM
Joined: Feb 2009
Posts: 1,585
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,585
wv
If you dont do a complete block flush and drain and only do the petcock or lower hose removal.. you can run straight coolant then drain at a later date and install the 50/50 mix. There is a bit of coolant that doesnt get removed in a lower radiator drain so you wont technically be running 100 percent coolant if you just fill the rad with straight unmixed coolant.

Re: run straight coolant [Re: slomo] #4674377
02/22/18 12:25 PM
02/22/18 12:25 PM
Joined: Sep 2007
Posts: 1,027
TX, USA
JMJNet Offline
JMJNet  Offline
Joined: Sep 2007
Posts: 1,027
TX, USA
Is there a particular reason to ask the question?


  • 2017 Toyota Sienna
  • 1995 GMC Suburban 6.5L Turbo Diesel


Re: run straight coolant [Re: slomo] #4674378
02/22/18 12:26 PM
02/22/18 12:26 PM
Joined: Sep 2015
Posts: 3,948
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,948
Connecticut
I ran 80-90% water + RL WW during hot summers on one of my old muscle cars that ran "hot." Would never think of running beyond 60-70% straight coolant. What's the advantage?


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: run straight coolant [Re: Gimpy1] #4674380
02/22/18 12:29 PM
02/22/18 12:29 PM
Joined: Jan 2018
Posts: 9
DC
fredly Offline
fredly  Offline
Joined: Jan 2018
Posts: 9
DC
Why you think glycol coolants not allowed on race track? Reason has nothing to do with which better, reason is strict ly to do with glycol spills are very slippery. Period, end of discussion. Water wetter garbage fine for track events where you changing it out constantly. Go peddle your water wetter elsewhere.

Re: run straight coolant [Re: fredly] #4674411
02/22/18 12:54 PM
02/22/18 12:54 PM
Joined: Aug 2017
Posts: 164
Displaced Texan in Mexico City
Gimpy1 Offline
Gimpy1  Offline
Joined: Aug 2017
Posts: 164
Displaced Texan in Mexico City
Who's peddling water wetter, I simply stated what is allowed. Never said put water wetter in your radiator did I?

Re: run straight coolant [Re: slomo] #4674416
02/22/18 12:58 PM
02/22/18 12:58 PM
Joined: Feb 2016
Posts: 686
NJ, USA
MotoTribologist Offline
MotoTribologist  Offline
Joined: Feb 2016
Posts: 686
NJ, USA
Apparently you didn't read about how the discussion (that we were all obviously having about why water wetter is so great whistle) was ended.

No need to respond further LOL

Re: run straight coolant [Re: slomo] #4674459
02/22/18 01:27 PM
02/22/18 01:27 PM
Joined: Oct 2015
Posts: 2,809
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,809
Balearic Islands , Spain
I run premixed 20-30% coolant 80/70% water green gycol coolant in everything i own.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.

Finnish expat in Spain.
Re: run straight coolant [Re: FordCapriDriver] #4674465
02/22/18 01:32 PM
02/22/18 01:32 PM
Joined: Aug 2003
Posts: 13,144
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 13,144
NE,Ohio
Originally Posted By: FordCapriDriver
I run premixed 20-30% coolant 80/70% water green gycol coolant in everything i own.


if you use less than 30% coolant or more than 70% coolant it can cause issues

30/70 is a good compromise for hot climate.

70/30 is for best freezing protection

50/50 for most climates is great.

disclaimer I am talking about normal stuff, green,pink,red,orange,blue etc.

not including exotic "waterless coolant" etc.


2019 Jeep Cherokee Trailhawk 2.0T
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