coolant - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-06-2004, 08:47 AM   #21
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Quote:
Originally Posted by opensourceguy
Just stick with the coolant the car came with. You WILL run into problems later on. Dex and Gly don't get along well.. and they will wreak havic upon your cooling system.


-justin
Can't be that bad...haven't seen one reported incident of DexCool in this club yet.
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Old 10-07-2004, 11:52 AM   #22
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-vital49, just wondering for certain what you mean about not seeing one incident about dexcool yet on this forum?

I have read all through this thread twice, and also the techinfo article on dexcool. It seems to me that overall good advice has been given. I found the tech info very interesting, and I have also read the same data from other sources too, when doing some research on this whole "dexcool-problem related" issue. (-also found it pretty interesting that FoMoCo decided that there was no real advantage to using the "O.A.T." -type of coolants.) By the way, there is tons of horror stories out there on the internet related to dexcool, and probably in all cases people have not been "anal" enough about keeping ALL OF THE AIR out of the system.

Seems to me the best advice is to simply stick with whatever the manufacturer has installed originally, whether it be green, orange, pink, red, -whatever. Consulting the owner'* manual is advice that is hard to beat. ALSO, keep it clean, NEVER add any stopleak to the dexcool, and ALWAYS keep the level withing the operating range on the coolant bottle, and NEVER run the dexcool beyond the 5-year limit.

Now if you want to get into my >personal< experience with the two different types of coolant, that is a whole story of it'* own. I will not use up the space here that it would take to adequately describe two of my HORRIBLE experiences with the dexcool. -absolutely HORRIBLE . In ALL OF MY SEVERAL DECADES of automotive (and other) engine maintenance experiences I have NEVER NEVER seen anything in the "yellow/green coolant world" that even comes close. -and I have been around systems using the old green coolant that had never never been touched, and were still very clean.

But, bottom line for me is, I have stayed with the "OAT-compatible" coolant in my '99 bonneville. I was VERY TEMPTED to change, but decided against it. I did use the new Prestone "all-compatible" orange stuff, and I will keep a close eye on it.
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Old 10-07-2004, 12:31 PM   #23
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WOW, just did a "google search" using the two words "Dexcool problems". SHEESH, sometime when I have a couple of hours, I'll start reading through some of the articles.

Here is one link that I think is very revealing: http://www.imcool.com/articles/antif...l-macs2001.htm

-read on down past their sales pitch about thier video, and read the 12 points recapping the presentation. -looks quite accurate, from my personal experience.
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Old 10-07-2004, 01:28 PM   #24
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Quote:
Originally Posted by 57chevythunder
-vital49, just wondering for certain what you mean about not seeing one incident about dexcool yet on this forum?
Yes, nobody here on bonnevilleclub.com has reported any incidents of the DexCool in their 3800 powered cars. That'* why my suggestion was to stick with what the manufacturer recommends. In a properly maintained vehicle (fluids topped off, and air kept out of the system), I don't see why DexCool is so bad?!?!
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Old 10-07-2004, 02:05 PM   #25
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-vital49, And I agree with you, (-I think?) in that dexcool should be fine, IF -and that is a VERY BIG IF people will be real "anal" about keeping all of the air out, etc. Also, I'd darn sure NEVER go one day past the 5-year point on replacing it.

I'm very serious about suggesting people do a "google search" using the two words, "dexcool problems."

The education is WELL WORTH the time.

You certainly know me well enough by now, to know that I always appreciate those (like yourself) who do a good job of dispelling myths, and take the extra effort to dig out the real facts on a topic.

Keep up the good work

Oh, also the web link that I listed in my previous reply explains the VERY important reason to use the "spring-loaded" cap on dexcool systems.

-"later"
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Old 10-07-2004, 02:08 PM   #26
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We've had our share of the 'sludge complaints' with dexcool here. How many cars really have or have had a problem with it here is unknown.
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Old 10-07-2004, 03:03 PM   #27
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Quote:
Originally Posted by 57chevythunder

Oh, also the web link that I listed in my previous reply explains the VERY important reason to use the "spring-loaded" cap on dexcool systems.

-"later"
I actually installed a Stant cap in my 99, per the recommendations of various anti-DexCool sites. I did it at the same time that I installed the lower intake gaskets and upper intake. Hopefully by closely monitoring the system, in combination of the Stant cap, the air will remain out of the system and I won't have an issue with the DexCool.

Quote:
Originally Posted by willwren

We've had our share of the 'sludge complaints' with dexcool here. How many cars really have or have had a problem with it here is unknown.
That is an interesting comment because your counterpart (jr's3800) actually went from the green to DexCool!!!!
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Old 10-07-2004, 03:40 PM   #28
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Re: the statement, "That is an interesting comment because your counterpart (jr's3800) actually went from the green to DexCool!!!!"

Did anyone yet notice that Item 7 of http://www.imcool.com/articles/antif...l-macs2001.htm addressed that issue?

Hmmmm,,, personnaly I still wonder,,,,

GOOD DISCUSSION here folks !!
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Old 10-07-2004, 03:54 PM   #29
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Quote:
Originally Posted by vital49

Quote:
Originally Posted by willwren

We've had our share of the 'sludge complaints' with dexcool here. How many cars really have or have had a problem with it here is unknown.
That is an interesting comment because your counterpart (jr's3800) actually went from the green to DexCool!!!!
My counterpart has nothing to do with this comment. Don has converted to Dexcool, true. But nevertheless, we've had sludge issues on this site, and have had Dexcool warnings and FAQ'* in Techinfo dating WAY back.
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Old 10-07-2004, 04:01 PM   #30
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Quote:
Originally Posted by willwren
Quote:
Originally Posted by vital49

Quote:
Originally Posted by willwren

We've had our share of the 'sludge complaints' with dexcool here. How many cars really have or have had a problem with it here is unknown.
That is an interesting comment because your counterpart (jr's3800) actually went from the green to DexCool!!!!
My counterpart has nothing to do with this comment. Don has converted to Dexcool, true. But nevertheless, we've had sludge issues on this site, and have had Dexcool warnings and FAQ'* in Techinfo dating WAY back.
Sure he does. I was reitterating that it must not be THAT bad if an admin of auto forum went from the known, problem free green coolant TO DexCool, that DexCool can't be THAT bad.
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