The nasty effects of DEXCOOL. Get rid of it! - Page 7 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 05-30-2007, 11:50 AM   #61
Administratus Emeritus
Certified Car Nut
 
GXP Venom's Avatar
 
Join Date: Jan 2006
Location: Purgatory, Pennsylvania
Posts: 16,538
Thanked 7 Times in 4 Posts
GXP Venom is on a distinguished road
Default

Sorry for picking Will, those are some NASTY gaskets! Did they see alot of high temps such as at the track?. Either way thats remarkable for 30K miles. Were You throwing an orange fog behind ya?
GXP Venom is offline   Reply With Quote
Old 05-30-2007, 11:52 AM   #62
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

John.... Similar to my thoughts Those intake runners should have been leaking..although if only wicking.. then the failure would have only been slight.

I've yet to notice the wicking with gaskets I've changed. GM changed the design to be a more sturdy gasket. Instead of changing the coolant. They are aware the coolant isn't up to spec...but they changed only one gasket on the motor.
BillBoost37 is offline   Reply With Quote
Old 05-30-2007, 12:00 PM   #63
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Venom, these aren't my car. I don't have a 3800 that ever saw a drop of DEX. My cars are 93 and 95. DEX started in 96. These are off EK98'* car. I pulled them myself. They were just starting to foul the plugs when we went in there.

These are NOT uncommon. These are very typical DEX-exposed LIM gaskets. I've seen MANY on this Forum that look just like this or worse.

Pics quoted over to page 4:

Quote:
Originally Posted by willwren
The thread is directly about DEX.

Here'* a set of L36 LIM gaskets at about 30-35k miles. Please note that the DEX was probably already acidic when these were installed:










Now for the explanation:

willwren is offline   Reply With Quote
Old 05-30-2007, 09:54 PM   #64
Senior Member
Posts like a Turbo
 
Join Date: Jan 2005
Posts: 259
Thanks: 0
Thanked 0 Times in 0 Posts
bigbadbonneville is on a distinguished road
Default Re: The nasty effects of DEXCOOL. Get rid of it!

You said this was your car, you dont ever bother to check your coolant from time to time or just dont ever until now? well just think the radiator looks like that, just think whats in the motor cooling passages and the UIM cooling holes and the water pump. I think I would replace the water pump and also clean the whole system out the best you can. Wow that is very serious. - in short term check your cooling system every 3000 miles like your oil. LOL Oh Also that looks like a mixture between DEXCool and a different type of Coolant mixed together. Thats what happens when you mix DEXCool and Non-Dexcool coolants together. Seen it happen on alot of different GM owners that dont know any better.
bigbadbonneville is offline   Reply With Quote
Old 05-31-2007, 12:08 AM   #65
Member
Posts like a V-Tak
 
Join Date: Sep 2005
Posts: 73
Thanks: 0
Thanked 0 Times in 0 Posts
GMCSonoma is on a distinguished road
Default

As for the thread starter...it looks like sealing tabs were added to the dex @ one time...

I've seen both green & dex eat away the LIM'*...the cure seems to be the metal LIM gaskets...

Dex supposedly has OAT for additives, whereas like Zerex G-05, Motorcraft Gold or Mopar Long Life has H-OAT or a G-05 additive which does not react to air like regular Dex with just an OAT additve.
The best way to see if a coolant is OAT, is to check the ingredients. If it lists 2-EHA..than you have a OAT..just like Dex.

One thing about G-O5, is that it tolerates cavitation and hard water better than the OAT blends as well as air in the system. It also is precharged...
GMCSonoma is offline   Reply With Quote
Old 05-31-2007, 12:15 AM   #66
Senior Member
Certified Car Nut
 
Join Date: Mar 2003
Posts: 12,432
Thanks: 0
Thanked 0 Times in 0 Posts
J Wikoff is on a distinguished road
Default

Prestone all makes has 2-ethyl hexanoate. Is that 2-EHA?
J Wikoff is offline   Reply With Quote
Old 05-31-2007, 02:09 AM   #67
Senior Member
Posts like a Camaro
 
Join Date: Dec 2005
Location: Clovis, CA
Posts: 851
Thanks: 0
Thanked 0 Times in 0 Posts
MACDRIVE is on a distinguished road
Default

How long does it take for dex to accumulate gasket eating acids?

I drain and fill my radiator every 6 months. The dex always looks like cherry flavoured CoolAid.
MACDRIVE is offline   Reply With Quote
Old 05-31-2007, 09:14 AM   #68
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

MAC.. I doubt you'll ever need to worry with that maintenance schedule. It'* tough to say when the bad effects start. 6 months should not be an issue though.
BillBoost37 is offline   Reply With Quote
Old 05-31-2007, 09:16 AM   #69
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Why do that every 6 months when you can ditch it completely and let it go at least a couple years?
willwren is offline   Reply With Quote
Old 05-31-2007, 04:18 PM   #70
Senior Member
True Car Nut
 
Join Date: May 2003
Location: Lethbridge, Alberta, _______Canada._______ West Coast Bonneville Fest ___05,06,07 Survivor___
Posts: 8,134
Thanks: 0
Thanked 0 Times in 0 Posts
SSEimatt93 is on a distinguished road
Default

I have converted recently from Dex Cool to the Green stuff, i will NEVER run that orange **** in any of my vehicles ever again, it wreaks utter havoc on gaskets, my LIM gasets at 139,000 kilometers looked like garbage, i was indeed consuming a bit of coolant down an intake passage on cylinder 2 I do belive.
They were collapsed worse than the ones willwren just showed.
YET the gaskets in my 93 at 179,900 kilometers looked like new, NOT a single issue...seems the ratio of failed or failing gaskets on dex vehicles to failing or failed on Glycol vehicles is high.
SSEimatt93 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
getting rid of a nasty moldy funk LittleHoov Detailing & Appearance 4 10-14-2006 03:02 PM
Looking to get rid of my 2001 SSEi Factory Chrome Rims (17&q jasonapr78 2000-2005 3 08-07-2003 02:00 PM
Looking to get rid of my 2001 SSEi Factory Chrome Rims (17&q jasonapr78 Performance, Brainstorming & Tuning 9 08-07-2003 01:59 PM
To Dexcool or not to Dexcool ???? along 1992-1999 7 06-08-2003 12:40 PM
Can I get rid of the ABS? Blk_Bonneville 1992-1999 16 09-27-2002 10:06 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:47 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.