The only thing I can tell is from what I have seen myself. 94 vett no problem. 09 hummer no problem 96 chevy truck all good too along with others but the bonnieville it ate the manifold or it had a problem and the coolant hydro locked it. when it was drained it had white powder eveywhere not sure if it was disolved manifold or a reaction to the leak before it died. I was loosing coolant for awhile before it died and never found out where untill I was pulling plugs to get it out of the cylinders.
I never said the white powder ate anything but it was everywhere and not sure what is was or where it came from.
I still use dex cool and very happy with it.

 

I'd add to that list:
Polaris: no problem
Arctic cat: no problem
Chevy trucks, vans and suburbans: no problem
Ford trucks, vans, Winsor, Mod motor, V8, V10: no problem
Cummins 8.3L Diesels: no problem
Cummings QSL 9L: no problem
CAT C9: no problem
CAT C13: no problem
Detroit Series 40: no problem
Allis Chalmers (200hp): no problem
Mercedes 906 and 926: no problem
Yamaha snowmobiles: no problem
Cast iron engines: no problem
Aluminum engines: no problem
Plastic intakes: no problem
aluminum intakes: no problem
2 stroke engines: no problem
4 stroke engiens: no problem
diesel engines: no problem

Bonneville SSE engines...problem?

I don't know....seems more like we have an engine problem, than a coolant problem. If the stuff works trouble free in aaaallllll these other vehicles, and the Bonneville SSE has issues, doesn't it seem more reasonable that the problem is w/the Bonneville motor and not the coolant? The motor is the variable that is different here. I agree that you could brow beat GM into warranty payment....but I can't see how that or 3.8L engine issues is proof of anything. Eyebrow raising, yes. Question provoking, yes. Proof? I'm not seeing it.

What I DO see, as a common "theme" regarding Dex Cool, is a pattern of people blaming Dex for problems that have other, more legitimate explanations when examined thoroughly. Kind of like when people blame "vapor lock". A problem occurs, the first obvious thing to blame is the one thing that is different or that you can't explain. That isn't conclusive, however...it isn't proof. In order for it to be conclusive, then Dex would also have to produce the same results in all engines. Or at least all similar engines....or something like that. If as the Admiral claims, "Dex produces white powder"...that is a blanket statement. Where is the white powder in the pics I've posted of HIGH mile vehicles? Or the 100's of engines that I've run it in? Where is the white powder and/or damage, after 100's of 1000's of hours of use in my fleet vehicles? It's not there....so there has to be another explanation that further examining would reveal.

.

 

I was just backing up the white powder in the coolant I never did get a answer what caused it but they paid me $400 and gave me a redisigned manifold not sure if the coolant ate it or it was just bad.

 

Copy that. GOOD that they took care of you....I'd be livid if they didn't.

 

Oh I was the only reason I was taken care of is I went to central office.

 

my 98 grand prix gtp ( supercharged ) has had coolant issues for the last 15 years whether it has dex cool or regular prestone in it. always had to flush/clean system once a year as it got brown/rusty looking. this is the only vehicle I have had coolant issues with except my wife's 76 cutlass w/350 when we got married.

 

Does it have the 3800 in it change the intake manifold to the new one raise some hell and they will give you one and some money or change it for you for free. Do some research and raise some hell Maybe you can get some answers and put this to bed.

 

White powder=electrolysis of the aluminum.When the coolant goes acidic(too little service )the iron block and aluminum parts form a low voltage battery and the aluminum bits go first.I suspect using hard water with your 50/50 mix might also set things off.The old school green coolant used to have silica in it to keep the iron water jackets clean.If you put the old silica coolant in anything modern you lose the water pump seal.Most modern cars use some type of manufacturer speced coolant.I have been using the premix non-silicate coolant at my shop.No hard water out of the tap to set the mix off.

 

The ford trucks listed do not have dexcool in them unless they were swapped out by the owner. Its fords own coolant which is actually gold/yellow colored not the orange dex stuff.

 

That would be a 3800. Interesting. That suggests an engine problem too.


I completely That iswhy I get 50/50 premix for my personal vehicles and it's one reason for our fleet/at work, I always ordered the bulk coolant, premixed. Good quality water, and the other reason is that you can't trust employees to mix coolant 50/50...that's too hard for most people.



If you're talking about my list above, you're right; Fords don't come w/Dexcool. Neither do most of the machines in my list. We'd swap out the OEM coolant on all vehicles at the first service interval to Dex Cool, then run that for the life of the vehicle.


.

 

Oh and I have no idea of the odds of someone running across this but on the diesel side of things NEVER put dex cool in a ford powerstroke diesel EVER. Cavitation nightmares will ensue. Well that and dose the right coolant with sca's.

 

Pics of my SSEi head gaskets removed about 2 weeks ago 110k some sludge buildup in multi spots. The coolant itself looked very healthy. The White powder I did save aside. And lost due to rain. While I was in there did some porting to Exhaust ports on the heads, 1 Iron manifold, the other is tubular. Also ported the supercharger, TB, & intake. Two 8mm exhaust bolts broke very difficult to access on the firewall. I was way more concerned about getting my daily driver back together. Then to prove or validate myself. to anyone that refuses to believe the fact Dex-cool does have problems with some engine combo's.. GM did in fact get sued. Tom your typical child like responses you consistently post are retarded from someone that knows enough about cars. I really Do not care if you believe anyone. because Tom say's it cannot happen!!!!! I do not need to prove or ask Tom for permission. I wish I placed the Actual white powder scraped off of various parts in a baggie. Luckily there was no real damage this powder did etch/corrode very minimal into a few parts including the upper radiator hose. The gaskets are now rusty from sitting outside.












digging into a few more GM lawsuits sources.
they claim the wet intake systems are the one's that suffered this problem. Taking out gaskets. Creating air in the system & so on. Pretty interesting the LT1 started the dry intake.

 

You don't "get it", what proof is. Anyone can sue for anything. That someone brought a suit against GM isn't proof of anything! It is evidence. Evidence of what? That there was some kind of problem. Was it the coolant? The gaskets? Other materials? We don't know, and the fact that a suit was brought, no more "proves" Dex Cool is the root problem, than if I were to bring a suit agains you, then tout it here on the forums as "proof" that you're what ever I'm claiming in my suit. Get it? Yes there were problems. Coolant related? WE DON'T KNOW, and a suit "proves" nothing.


I'm the one who's childish and "retarded" here? Have SEEN what you post? Here is childish:
As for "retarded"...have your READ your posts? Punctuation? Sentence structure? I think you calling my posts "retarded" is the pot calling the kettle, black. Learn how to type, and put a paragraph together that makes some sense, before you start calling others "retards".


Now hold on a second....TOM never said that. What Tom ACTUALLY said, was that Tom has managed a fleet w/100's of 1000's of hours of trouble free Dex use, then Tom posted real world results of PROPER, Dex cool use. Then Tom asked, where the "white powder" was? If Dex cool does the things you said, shouldn't there be evidence of that in a 243,000 mile vehicle?

I absolutely believe that things can happen; "white powder", sludge, and other issues. WHY are they happening? We don't know. Could be Dex, could be the water used, could be other contamination, could be poor PM....tons of things. Just b/c there is a "new/different" coolant in there, that isn't proof that is the cause, and spouting off about it makes it no more so that way. It just spreads misinformation. Additionally, when I post pics of 200k+ mile radiators that look virtually brand new (with proper Dex use), how can one rationalize that it causes hell in one engine, but not in another similar engine? How does that make any sense?


I'd guess that the "white powder" is the result of what ever you had going on in there, not the cause. I totally believe you that you saw something in that motor. Never said otherwise. I don't believe that what you saw was caused by the coolant. I think it's an engine-specific problem.

 

Excuse Me gentelmen, .... I don't know if dexcool is or not dangerous for some engine type..

What i'm not be able to get about it, is what should have inside dexcool to make it dangerous??? A corrosive component?

Coolant is coolant, it is for alu engine or iron cast but always coolant it is...

Anyone said yet why it should be

 

Excellent question.

 

The only real difference in the green and dexcrap is the inhibitor additive. I honestly believe if you replace the dexcrap every 2 years or so you probably will never notice a difference. The green type you can leave in there forever. But its ability to fight corrosion will be lowered over time too just like the dexcrap.

The primary difference is the green just drops deposits that sit there with no real habit of building up in one spot and the dexcrap creates orange mud when it falls out of solution and clogs up stuff.

So in my opinion based on what Ive seen over there years (its a bunch of vehicles) if you change it on a regular bases I doubt the dex stuff will cause any real problems.

My problem with the stuff is I dont want to have to remember to change the antifreeze in vehicles on a regular bases. Thus I run green coolant in everything. I do run a special coolant in my powerstroke diesels but its because I dont like bothering with the sca needs of other coolants and having to use test strips to make sure its "right". Easier to just run a coolant that doesnt require checking on those.

I have ford falcon that I inherited from my grandfather. Its had the same coolant in it since 1970 something and works fine. Its running 100% antifreeze in it. No water pump problems or cooling problems.

Oil changes, plugs, fuel filters are what I consider maintenance items. Antifreeze isnt on my list. But I run green not orange. But to each their own.

 

This site seems to cover what a shop has had to deal with on the dexcool stuff and their opinion of it.

http://www.sancarlosradiator.com/dex-cool.htm

 

You may be right about changing Dex to avoid problems, but not changing "green" will definitely lead to problems too. I saw the site you posed and there are pics (HERE) that pretty clearly illustrate what happens to "green" when not changed....you get posts on these forums about cars that run hot and "need new radiators". There is another site (HERE) that gets pretty analytical about it, and uses pretty good logic to draw some conclusions. They hypothesize that Dex "eats" nylon based gaskets, and there may be merit to that....only hitch there is that my Silverado (which now has 269,000 miles on it) has plastic gaskets in it. And ~40 of the pickups where I worked had plastic backed intake gaskets too.

So, it's pretty hard to find anything conclusive on the interwebs. The thing I've got "going for me" (if you could call it that) is that I had access to many, many vehicles running it, for 100's of 1000's of hours which is a good data pool. In addition, we'd have them from new, to trade in, and maintenance was controlled; we knew ALL the history on each vehicle. All of that exposure taught me these three things:
*Don't Mix Dex and conventional coolant
*Use clean, distilled water
*Enjoy 5 maintenance free years of use.

 

That reminds me of clean out job I did on a v8 (was a truck but I dont remember the model other than it was a chevy) that had dex in it and the owner had been "topping it off" with green. THAT was some crap. Took the entire weekend to get it all out of there. I kept fussing the entire time for getting suckered into doing that for the guy. I honestly dont remember how many times I flushed the system but it was over 10. Ended up having to remove the intake manifold and manually scrapping the gunk out.

I still dont understand how he made it to my house in that thing. It was running "hot" but not overheating and his heater wasnt working. No mention of him mixing coolant or Id of bailed before he got the truck to me.

This was before the days of handy digital camera's or Id of made pics of the mess.

So yep mixing is a sure way to plug up a motor.

 

Man, that sounds like a severely unpleasant way to lose money! Yuck.

I'm surprised that you were actually able to get it all out! That is perseverance!