BEWARE: GM "Dex-Cool" Anti-Freeze - Team Camaro Tech
Engine General Engine Discussion.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 23 (permalink) Old Oct 30th, 09, 05:14 PM Thread Starter
Senior Tech
Ron
 
Join Date: Nov 2006
Location: North Channel Lake Huron
Posts: 3,934
BEWARE: GM "Dex-Cool" Anti-Freeze

Read this link : http://www.consumeraffairs.com/autom...m_dexcool.html

Make you wonder if the ladies aren't overheating the engines ;o)

Z15CAM - There was a Viper in my Rear View
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

This was my 70 1/2 Z28

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Z15CAM is offline  
Sponsored Links
Advertisement
 
post #2 of 23 (permalink) Old Oct 30th, 09, 05:43 PM
Gold Lifetime Member
Jeff
 
yellow69RS's Avatar
 
Join Date: Jul 2007
Location: Aurora, IL
Posts: 5,065
Send a message via Yahoo to yellow69RS
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

That place is the opposite of here. We are here because we all love Camaros, they are there to compalian about products. You happened to hit the page about Dex Cool. I've had it in my truck for it's whole life (11 Yrs)and I can't confirm any problems that can be traced to Dex Cool.
Just my .02 YMMV

Jeff
yellow69RS is offline  
post #3 of 23 (permalink) Old Oct 30th, 09, 06:08 PM
Moderator
Kevin
 
KevinW's Avatar
 
Join Date: Jul 2000
Location: Millstone, NJ
Posts: 11,070
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

Running dexcool in both my 2004s, no problems!

Kevin


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
KevinW is online now  
 
post #4 of 23 (permalink) Old Oct 30th, 09, 06:13 PM
Banned
Alan
 
98blackburb's Avatar
 
Join Date: Feb 2007
Location: Indian River Chevrolet,
Posts: 3,632
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

I have a 1998 Suburban, replaced 2 water pumps,radiator,,thermostat,intake gasket.........took out thermostat,flushed dexcool out after 1 hour reving up here and there,finally got a clear visual ,put in green prestone and over 120,000 miles later no problems.
Do a search
http://www.google.com/custom?domains...ORID%3A1&hl=en
98blackburb is offline  
post #5 of 23 (permalink) Old Oct 30th, 09, 06:36 PM
Senior Tech
Shawn
 
Join Date: May 2005
Location: PA
Posts: 1,339
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

wow, this is such an old problem

there should be NO problems with dexcool if it is used properly, and with distilled water

my car had dexcool, and it was fine, i maintained the cooling system and used only distilled water.. at about 120k miles i flushed it out and put prestone extended life in (compatible with all colors of coolant)

meanwhile my fathers car had the dexcool get all messed up and black/brown because he would fill the overflow up with hose water, and in turn it ruined his intake gasket.

im not a fan of dexcool, but i wont bash it either because it works flawlessly if the cooling system is maintained properly
victimizati0n is offline  
post #6 of 23 (permalink) Old Oct 30th, 09, 09:14 PM
SY1
Senior Tech
Dave
 
Join Date: May 2001
Location: Michigan
Posts: 2,920
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

Of the 6 cars I still have only my 98 Grand Prix and possibly my 04 GTO have Dexcool. The GTO sits mostly so I can honestly say I've never even looked at the coolant. But the 98 GP's cooling system was a mess after a few years with Dexcool. I got tired of having it flushed due to all the brown build up every couple years and just switched to the Prestone and have had no issues since.

Hadn't thought about distilled water. That would probably help, but it's a shame it's that critical. All my other cars use tap water and no issues.

"..............what, and get out of aviation??"
SY1 is offline  
post #7 of 23 (permalink) Old Oct 30th, 09, 09:34 PM
Senior Tech
Todd
 
Join Date: Aug 2006
Location: Henderson, NV
Posts: 1,664
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

Dexcool is supposed to be used with distilled water. That was an error on GM's part thinking that people would actually follow directions. That being said, GM is known for leaky water pumps and intakes.
Vegas69 is offline  
post #8 of 23 (permalink) Old Oct 30th, 09, 11:31 PM
Senior Tech
Levi
 
Join Date: Oct 2007
Location: Modesto Ca
Posts: 1,451
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

Ive used dexcool in my 75 stock radiator even with the hose water no problems. Its still orange but who cares nothing hurts chevys.

1975 Camaro "Black Out"
.Bad75. is offline  
post #9 of 23 (permalink) Old Oct 31st, 09, 02:02 PM
SY1
Senior Tech
Dave
 
Join Date: May 2001
Location: Michigan
Posts: 2,920
Wink Re: BEWARE: GM "Dex-Cool" Anti-Freeze

Quote:
Originally Posted by Vegas69 View Post
Dexcool is supposed to be used with distilled water. That was an error on GM's part thinking that people would actually follow directions. That being said, GM is known for leaky water pumps and intakes.
Todd you are right. People aren't going to read instructions for something they've been doing all their lives, especially a simple task like this. Large bold letters across the top of the bottle of Dexcool that say "USE DISTILLED WATER ONLY" would probably have saved everyone, GM included, a lot of grief. But then if I read that on the bottle I'm probably buying the competitors product to save myself the trouble. GM was probably aware of that also.

When the low coolant light comes on and you're on the road you are going to top it up with whatever you can get your hands on. GM engineers should've known better than this.

"..............what, and get out of aviation??"
SY1 is offline  
post #10 of 23 (permalink) Old Oct 31st, 09, 02:16 PM
Gold Lifetime Member
Jim
 
Join Date: Dec 1999
Location: Yorkville, Illinois USA
Posts: 22,121
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

all gm cars have had dex for a long time, and most work well. I had one, an 03 malibu, that didn't.

I'm not sure about the distilled water, after all a sealed cooling system should not be using any or needing to be topped off.

One thing for sure dex doesn't like is air.
The system has to be full to the top and pressurized, no air bubbles. In that malibu, even the expansion tank is pressurized. It delveloped a leaky intake gasket, changed it, flushed and filled with orange, no more problems.





To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
New website for my vert is coming together. Do ya like the slide show on the home page?
JimM is offline  
post #11 of 23 (permalink) Old Oct 31st, 09, 09:08 PM
SY1
Senior Tech
Dave
 
Join Date: May 2001
Location: Michigan
Posts: 2,920
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

I agree with Jim in that a sealed system should not be needing any fluid added. That said the problems with GM plastic air intake plenums is well documented in that they crack due to problems near the EGR take off. The result is often coolant leaks that are hard to put your finger on unless you are aware of the design problems of the GM intakes. That's exactly what we have going on right now with the Grand Prix. After talking with several people who've all had to replace their intake manifolds due cracking I'm pretty sure that's going to be the source of the leak on the Grand Prix.

Luckily Dorman makes a more robust designed intake manifold for the GM 3.8 motor that solves the issues with the heat from the EGR cracking the intake. That's the route I'll be going. Bottom line is as a result we've had to add coolant/water for a while until we found the leak.

"..............what, and get out of aviation??"
SY1 is offline  
post #12 of 23 (permalink) Old Oct 31st, 09, 09:19 PM
Gold Lifetime Member
Michael Gekko
 
Join Date: Mar 2006
Location: Wrightsville Beach, NC
Posts: 5,583
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

I have a 96 z-71 with a vortec 350, I never saw any kind of sticker anywhere about proper care concerning the coolant system. I added water to the radiator in small amounts over time....then everything started leaking. Intake, quick disconnect POS, radiator, water pump.....a mechanic told me it was due to air getting into the system that started the corrosion process.
We flushed the radiator on the truck and ran a hose through it for 30 minutes and the water never cleared up . It was unreal.

1968 Camaro NHRA/IHRA SS/C 'Super Stocker' 396/Jerico
1968 Street/Strip Camaro 350 w/PG
1968 Caprice NHRA/IHRA Stock ELiminator O/SA 327-250 HP



Land of the Free Because of the Brave

It Takes a Long Time to Grow Old Friends
Eleanor's Nemesis is offline  
post #13 of 23 (permalink) Old Oct 31st, 09, 09:21 PM
Gold Lifetime Member
Michael Gekko
 
Join Date: Mar 2006
Location: Wrightsville Beach, NC
Posts: 5,583
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

Oh, and i forgot we replaced the heater core too. I would replace whatever was leaking and within 2 weeks something else would start leaking.

1968 Camaro NHRA/IHRA SS/C 'Super Stocker' 396/Jerico
1968 Street/Strip Camaro 350 w/PG
1968 Caprice NHRA/IHRA Stock ELiminator O/SA 327-250 HP



Land of the Free Because of the Brave

It Takes a Long Time to Grow Old Friends
Eleanor's Nemesis is offline  
post #14 of 23 (permalink) Old Oct 31st, 09, 09:58 PM
Senior Tech
Tim
 
77wolf10.85's Avatar
 
Join Date: Mar 2007
Location: Oklahoma
Posts: 3,222
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

Deb's 96 Burban drinks dexcool. Couple quarts a month easy, and always has. It is filthy brown, always has been even after I did a mega-flush. Now the drivers side radiator header tank is leaking a little and we said heck with it and put some radiator in a can in it. When I met Deb 7 years ago that thing had about 150k on it, and now it has about 300k. I guess if it goes belly up, it won't be entirely from antifreeze issues. Knocks like hell on startup(always has but now it's obscene), I gave it 2 quarts of 40 wt a couple days ago to help ease its pain. Tranny is leaking now too. I've been telling her for 2 years to trade it off. She don't wanna.

Damn, I don't wanna put an engine in a Burban. They look like they suck pretty bad to r&r. Oh well.

Tim Smith
77wolf10.85 is offline  
post #15 of 23 (permalink) Old Oct 31st, 09, 10:00 PM
kt
Senior Tech
kelly
 
Join Date: Sep 2009
Location: Vancouver
Posts: 975
Re: BEWARE: GM "Dex-Cool" Anti-Freeze

dex isn't the issue, people that continue to drive their cars and trucks in a state of disrepair is the problem. keep the system sealed, flush it every 5 years( who does this??) distilled water may help as some water contains minerals that will accelerate the corrsion process. 3.1/3.4 excluded of course as thier intake gaskets are a known issue.
kt is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome