I have a 2006 hummer h3 with deathcool as some call it. Should I be worried? It has 57,000 miles on it. What's a good alternative? If dexcool is bad
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whats deal with dexcool
- Thread starter finalyzd
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What motor do you have?
The way I take it with my GMs is if it has a dry intake with no coolant passages I keep it. If it is a motor that has coolant through the intake and a history of LIM failures I switch too old fasioned green.
Regardless, I would swap the deathcool out every two years regardless of mileage.
The way I take it with my GMs is if it has a dry intake with no coolant passages I keep it. If it is a motor that has coolant through the intake and a history of LIM failures I switch too old fasioned green.
Regardless, I would swap the deathcool out every two years regardless of mileage.
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finalyzd
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5 cylinder 3.5 liter. Sorry forgot to add that
With 57,000 change it with new Dexcool. Thats the deal.
finalyzd
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So just swap it for new dexcool? That was my plan till I saw some threads about it and sludge problems and being a gasket eater. Any more recomendations?
Gasket eaters are being confused with non-coolant changers. Coolant neglect. The vast majority of folks don't think about the coolant until a problem occurs. Thats too late. Dex cool should be changed out every 25 to 30,000mi.
Originally Posted By: mechanicx
I think Dexcool would be fine in this application. your coolant is about 4 years old and due for a change though.
I agree. I changed mine in my Trailblazer at about the 4 year point and about 50K on the odometer. The engine, radiator and thermostat all looked clean as a whistle.
I think Dexcool would be fine in this application. your coolant is about 4 years old and due for a change though.
I agree. I changed mine in my Trailblazer at about the 4 year point and about 50K on the odometer. The engine, radiator and thermostat all looked clean as a whistle.
Originally Posted By: willix
Gasket eaters are being confused with non-coolant changers. Coolant neglect. The vast majority of folks don't think about the coolant until a problem occurs. Thats too late. Dex cool should be changed out every 25 to 30,000mi.
Why? GM says every 5yrs or 100k miles -- you know more than they do? Where did your engineering degree from?
Gasket eaters are being confused with non-coolant changers. Coolant neglect. The vast majority of folks don't think about the coolant until a problem occurs. Thats too late. Dex cool should be changed out every 25 to 30,000mi.
Why? GM says every 5yrs or 100k miles -- you know more than they do? Where did your engineering degree from?
Why? GM says every 5yrs or 100k miles -- you know more than they do? Where did your engineering degree from? [/quote]
I agree. Did my '00 Tahoe 5.3L at 5 yrs (~60K mi.), and will do it again this year (5 more yrs, 105K mi.). Looks clean now, and looked clean when I changed it the first time. Water pump and thermostat still original to truck.
I agree. Did my '00 Tahoe 5.3L at 5 yrs (~60K mi.), and will do it again this year (5 more yrs, 105K mi.). Looks clean now, and looked clean when I changed it the first time. Water pump and thermostat still original to truck.
Dexcool probably has better performance on aluminum, steel, and iron and a longer life than most any other coolant. It has no silicates or phosphates to form solid abrasives (I don't think this is a big issue really) and is pretty tolerate of tap water that's not too low quality. It's pretty cheap and easy to find. Plus if your car has Dexcool already it's good to stay with the same formula if you can especially during the warranty period.
Those are the advantages in an ideal situation, with a pressurized reservoir and compatible gaskets. I think its disadvantages have been covered. It does has disadvantages. Green and G-05 protect against corrosion good as well though.
Those are the advantages in an ideal situation, with a pressurized reservoir and compatible gaskets. I think its disadvantages have been covered. It does has disadvantages. Green and G-05 protect against corrosion good as well though.
Originally Posted By: mechanicx
Dexcool probably has better performance on aluminum, steel, and iron and a longer life than most any other coolant.
Absolutely, categorically, unreservedly. PURE speculation and conjecture. You cannot make that statement because you haven't one shred of evidence to back it up.
Remember, Chrysler, Ford, and Mercedes Benz all recommend using G-05 and only GM uses Dexcool (with many instances of disasterous results)
Dexcool probably has better performance on aluminum, steel, and iron and a longer life than most any other coolant.
Absolutely, categorically, unreservedly. PURE speculation and conjecture. You cannot make that statement because you haven't one shred of evidence to back it up.
Remember, Chrysler, Ford, and Mercedes Benz all recommend using G-05 and only GM uses Dexcool (with many instances of disasterous results)
I have the evidence bud. I don't need to link you to every document I've read. Go research it yourself. You are the one speculating and engaging in conjecture.
You are wrong, many HD manufactures and several European automakers use essentially what is Dexcool. The Japanese use an extended coolant with OAT that is in Dexcool or in the same class.
You are wrong, many HD manufactures and several European automakers use essentially what is Dexcool. The Japanese use an extended coolant with OAT that is in Dexcool or in the same class.
Originally Posted By: mechanicx
I have the evidence bud. I don't need to link you to every document I've read. Go research it yourself. You are the one speculating and engaging in conjecture.
You are wrong, many HD manufactures and several European automakers use essentially what is Dexcool. The Japanese use an extended coolant with OAT that is in Dexcool or in the same class.
Dude: You absolutely DON'T know what you are talking about. Asian coolants DO NOT contain 2EHA. They are phosphated OATs and have never exhibited any of the problems associated with Dexcool. Only one European coolant is similar to Dexcool. Remember, to be like Dexcool, a coolant has to contain 2EHA and have no phosphates or silicates. You cannot name any coolants other than the Dex-clones that have this composition.
Please try to discriminate between your OPINION and facts.
I have the evidence bud. I don't need to link you to every document I've read. Go research it yourself. You are the one speculating and engaging in conjecture.
You are wrong, many HD manufactures and several European automakers use essentially what is Dexcool. The Japanese use an extended coolant with OAT that is in Dexcool or in the same class.
Dude: You absolutely DON'T know what you are talking about. Asian coolants DO NOT contain 2EHA. They are phosphated OATs and have never exhibited any of the problems associated with Dexcool. Only one European coolant is similar to Dexcool. Remember, to be like Dexcool, a coolant has to contain 2EHA and have no phosphates or silicates. You cannot name any coolants other than the Dex-clones that have this composition.
Please try to discriminate between your OPINION and facts.
You are a waste of time to debate with. Original Dexcool contains 2EHA and sebacate. Asian extended life coolant contains sebacate. Sebacate and 2EHA have a lot of similarities. Many HD coolants and european coolants contain 2EHA. You are the one stating opinion not fact, and on top of that you are stating erroneous opinions.
finalyzd
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This is why I like bitog good debates lol get some good information on both sides. And I will stick to dexcool since I have a warranty
I've criticized Dexcool as much as anyone, and the one time I mention its positive characteristics when someone asked, it was too much to say anything good about it for at least one poster. Dexcool's corrosion protection and long life is well tested and documented. Anyone questioning that or calling it opinion couldn't have read up on coolants much.
+1 Dex got a bad rap from GM, if they properly designed their cooling systems we wouldn't be having this discussion.
In my experience, many of the 60degree GM v6 lim gasket failures were more a fault of a weak gasket design than dexcool. Sure the dexcool may not have helped, but it was a marginal gasket to begin with. My mom had an Oldsmobile with a 3.1, I think a 95-96. It was the last year they used the green coolant as factory fill, but it had the newer style plastic manifold gasket, it still failed at about 90k miles. The gasket looked just as deformed and wasted as one from a dex engine.
I personally prefer Peak Global Lifetime coolant, and generally use that in everything when flush time is due, but I think the hype of Dexcool being "DEATHCOOL" and ruining engines is exaggerated in most cases.
I personally prefer Peak Global Lifetime coolant, and generally use that in everything when flush time is due, but I think the hype of Dexcool being "DEATHCOOL" and ruining engines is exaggerated in most cases.
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