C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

"Coolant Low" - DEX-COOL

Thread Tools
 
Search this Thread
 
Old Feb 23, 2007 | 11:32 AM
  #1  
vette-oholic's Avatar
vette-oholic
Thread Starter
Melting Slicks
15 Year Member
 
Joined: Jun 2005
Posts: 2,858
Likes: 1
From: Burlington County NJ
Default "Coolant Low" - DEX-COOL

Got this DIC message last nite. The users manual says to only use DEX-COOL. has anyone used anything else? I ended up just putting about 12 oz of water in and it was enough to clear the message. I guess i will have to pick up this DEX-COOL stuff. is it available all over?
Reply
Old Feb 23, 2007 | 11:43 AM
  #2  
Miaugi's Avatar
Miaugi
Le Mans Master
15 Year Member
 
Joined: Dec 2002
Posts: 7,588
Likes: 6
From: Montreal Qc
Default

Many retailers sell Dex-Cool compatible, I'm not picky for my regular daily drivers but I have always just bought it at a dealer when I needed some for the Vette(s).
Reply
Old Feb 23, 2007 | 12:24 PM
  #3  
dbradley's Avatar
dbradley
Pro
 
Joined: Nov 2005
Posts: 672
Likes: 1
From: Sapulpa Oklahoma
Default

Available everywhere. Just don't mix in the "green" stuff.
Reply
Old Feb 23, 2007 | 12:32 PM
  #4  
rfopt's Avatar
rfopt
Burning Brakes
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Nov 2004
Posts: 1,031
Likes: 4
From: Crete IL
Default

Originally Posted by vette-oholic
Got this DIC message last nite. The users manual says to only use DEX-COOL. has anyone used anything else? I ended up just putting about 12 oz of water in and it was enough to clear the message. I guess i will have to pick up this DEX-COOL stuff. is it available all over?
Was your coolant level in the coolant recovery tank very low, below the minimun level?
Reply
Old Feb 23, 2007 | 12:36 PM
  #5  
C7cmnthru's Avatar
C7cmnthru
Burning Brakes
20 Year Member
 
Joined: Jan 2004
Posts: 1,009
Likes: 54
From: slower lower DE
Default

IMO - the more important issue is why you got the message. My $.02
Reply
Old Feb 23, 2007 | 01:07 PM
  #6  
mlongo99's Avatar
mlongo99
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Nov 2004
Posts: 6,566
Likes: 2
From: Goleta CA
Cruise-In VIII Veteran
Default

When it say only use dexcool, it means don't use the green stuff. They are not compatible, and a cooling system should never be switched over from one to the other. But you still mix dexcool with water. Like the green stuff, the ratio is up to you. I don't have to worry about freezing, so I have been using 1/3 dexcool, 2/3 water.

And like already mentioned, you can find it almost anywhere.
Reply
Old Feb 23, 2007 | 03:30 PM
  #7  
stabori's Avatar
stabori
Burning Brakes
 
Joined: Apr 2005
Posts: 973
Likes: 0
St. Jude Donor '08
Default

Big question is where ur coolant went
Reply
Old Feb 23, 2007 | 03:54 PM
  #8  
vette-oholic's Avatar
vette-oholic
Thread Starter
Melting Slicks
15 Year Member
 
Joined: Jun 2005
Posts: 2,858
Likes: 1
From: Burlington County NJ
Default

well i have 14k miles and have never had to add any coolant or get a message before. I couldnt see the line so i figured i would just pour the bottle of water i had into it (about 12 oz) and the error went away, so it looks like it was a tiny tiny drop low. Then i drove the car about 10 miles and the temp gauge stayed normal.

is it that abnormal to burn a little off? I believe the manual says if u need to add collant more than 3-4 times a year, then theres a problem.

when i get out of work , I will check what level its at.

thoughts?

Originally Posted by stabori
Big question is where ur coolant went
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-1

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-2

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-3

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-4

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-5

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-6

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-7

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-8

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-9

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
Old Feb 23, 2007 | 04:25 PM
  #9  
stabori's Avatar
stabori
Burning Brakes
 
Joined: Apr 2005
Posts: 973
Likes: 0
St. Jude Donor '08
Default

Thats a good question. I dont know how much evap is normal. I havent added any in 2 years but u might be in a much warmer climate or track the car. Oops, we are in the same state. U been doing many of those miles 1/4 at a time at Englishtown ?
Reply
Old Feb 23, 2007 | 04:32 PM
  #10  
Miaugi's Avatar
Miaugi
Le Mans Master
15 Year Member
 
Joined: Dec 2002
Posts: 7,588
Likes: 6
From: Montreal Qc
Default

Originally Posted by vette-oholic
....is it that abnormal to burn a little off? I believe the manual says if u need to add collant more than 3-4 times a year, then theres a problem.

when i get out of work , I will check what level its at.

thoughts?
Good point by 04cmnthru & stabori. Basically the cooling system is a sealed system, well not totally sealed, but close, so there could be some lose considered normal. If your car was marginal to begin with, that may explain it, or if your fill cap was loose or defective could also do it. I would consider that having to add more water/coolant more than once a year abnormal.

Perhaps the best advice for now would be to check the level and all the connections for signs of any leaks and then keep and eye on it, especially with the warmer summer weather not too far off.
Reply
Old Feb 23, 2007 | 04:41 PM
  #11  
vette-oholic's Avatar
vette-oholic
Thread Starter
Melting Slicks
15 Year Member
 
Joined: Jun 2005
Posts: 2,858
Likes: 1
From: Burlington County NJ
Default

ive made 2 passes atco, but i drive the car hard at times.
about where do u live?

Originally Posted by stabori
Thats a good question. I dont know how much evap is normal. I havent added any in 2 years but u might be in a much warmer climate or track the car. Oops, we are in the same state. U been doing many of those miles 1/4 at a time at Englishtown ?
Reply
Old Feb 23, 2007 | 04:41 PM
  #12  
vette-oholic's Avatar
vette-oholic
Thread Starter
Melting Slicks
15 Year Member
 
Joined: Jun 2005
Posts: 2,858
Likes: 1
From: Burlington County NJ
Default

ive made 2 passes atco, but i drive the car hard at times.
about where do u live?

Originally Posted by stabori
Thats a good question. I dont know how much evap is normal. I havent added any in 2 years but u might be in a much warmer climate or track the car. Oops, we are in the same state. U been doing many of those miles 1/4 at a time at Englishtown ?
Reply
Old Feb 23, 2007 | 05:41 PM
  #13  
C7cmnthru's Avatar
C7cmnthru
Burning Brakes
20 Year Member
 
Joined: Jan 2004
Posts: 1,009
Likes: 54
From: slower lower DE
Default

As Miaugi noted, cooling system is a closed system. It may have come low from the factory, so watch it. If you keep losing it there is a leak somewhere. You might want to look around under the car for discoloration/crystalization - might be the sign of a coolant leak. Or better yet, take it to the dealer to check it out. That way if they find nothing you have established a service record in case there is a problem that went undetected. BTW- you do not just mix coolant with water at whatever mixture ration you think is right - the service manual will telll you what is right for your car. Coolant pH is critical in aluminum systems and can influence the myriad of sensors that rely on proper coolant mixture/temp. Also, mixing at the incorrect ratios can contribute to internal corrision.
Reply
Old Feb 23, 2007 | 06:01 PM
  #14  
stabori's Avatar
stabori
Burning Brakes
 
Joined: Apr 2005
Posts: 973
Likes: 0
St. Jude Donor '08
Default

Originally Posted by vette-oholic
ive made 2 passes atco, but i drive the car hard at times.
about where do u live?
I live about 15 minutes from Englishtown. I go and watch. This year I will make some runs.
Reply
Old Feb 23, 2007 | 06:16 PM
  #15  
CessnaDriver's Avatar
CessnaDriver
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Oct 2004
Posts: 2,210
Likes: 9
From: CA
Default

FYI

I believe there is no coolant sensor to speak of and determines low coolant by using temperature monitoring methods.

Anyone know the details?
Reply
Old Feb 23, 2007 | 06:56 PM
  #16  
mlongo99's Avatar
mlongo99
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Nov 2004
Posts: 6,566
Likes: 2
From: Goleta CA
Cruise-In VIII Veteran
Default

Originally Posted by 04cmnthru
BTW- you do not just mix coolant with water at whatever mixture ration you think is right - the service manual will telll you what is right for your car. Coolant pH is critical in aluminum systems and can influence the myriad of sensors that rely on proper coolant mixture/temp. Also, mixing at the incorrect ratios can contribute to internal corrision.
The service manual also tells people that live in Alaska to use the same water mixture and oil viscosities as people in the desert. Yes, there is a minimum level needed for corrosion protection, but some people also need a lot more freezing protection than others. 50/50 is not a magical combination, but it works well, and is a nice even number to reccomend. Also, there are corrosion inhibitors that are known to work well that are available as additives.
Reply
Old Feb 23, 2007 | 06:58 PM
  #17  
mlongo99's Avatar
mlongo99
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Nov 2004
Posts: 6,566
Likes: 2
From: Goleta CA
Cruise-In VIII Veteran
Default

Originally Posted by CessnaDriver
FYI

I believe there is no coolant sensor to speak of and determines low coolant by using temperature monitoring methods.

Anyone know the details?
That's right. I now recall reading that in the service manual. There was quite a bit written on how it works.
Reply

Get notified of new replies

To "Coolant Low" - DEX-COOL

Old Feb 23, 2007 | 08:10 PM
  #18  
C7cmnthru's Avatar
C7cmnthru
Burning Brakes
20 Year Member
 
Joined: Jan 2004
Posts: 1,009
Likes: 54
From: slower lower DE
Default

http://www.imcool.com/articles/antif...l-macs2001.htm

For those of you interested in the proper mix ratio, please see bullets 5 and 6 of the article.
Reply
Old Feb 23, 2007 | 09:27 PM
  #19  
Gearhead Jim's Avatar
Gearhead Jim
Team Owner
Supporting Member
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2000
Posts: 25,001
Likes: 2,700
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Default

AFAIK, Dexcool is Dexcool. But you've got to be careful with some brands like Toyota, they make two orange/pink coolants that are hard to tell apart unless you have them side by side.
Reply
Old Feb 23, 2007 | 09:34 PM
  #20  
aseipos's Avatar
aseipos
Racer
Supporting Lifetime
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Sep 2001
Posts: 362
Likes: 1
From: Chicago IL
Default

I had one of these "low coolant" incidents and responded by picking up a couple gallons of distilled water so I could get home and check it properly.

Turned out that I was only a few ounces low, if low at all. The no-float, non-mechanical way our cars has of monitoring coolant level also means that the "low coolant" warning can sometimes be wrong, especially if we don't warm up the car sufficiently before taking off. Starting in a warm garage, I usually allow a minute or two of warmup before taking off. That particular morning when I got the "low coolant" warning, I drove off after only about a 10 second warmup. False alarm.
Reply




All times are GMT -4. The time now is 11:44 AM.

story-0
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-1
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-2
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-3
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-4
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-5
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-6
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-7
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-8
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-9
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE