The antifreeze in my 2000 is that pinky/redish looking GM stuff. Is this a good thing or a bad thing?? I have had some people tell me to get that garbage out of there and others tell me its great stuff. Also had people tell me that if you mix the green and red together it will gel, also had people tell me the red gells on it own.............
whats the deal???

 

I would stay with the DEX COOL, do not mix with other types.
Change at 100k, or five years, check your owners manual.
Just had mine replaced, with 30k on the car

 

I would also stay with the DEX COOL. I think I would change it before five years though. It is my understanding that some of the reported problems were time related. I do mine on a three year replacement now.

 

I was one of those "reported problems" and it cost me over $700 to become a member of the club

 

I had my Chevy dealer do a power flush on mine last year. I, personally, have not had any issues with the Dex Cool in any of my vehicles.

 

Stay with the Dex Cool. It does a good job. No problems here on this 2001.

Chuck

 

 

I never heard of any coolant gel, maybe at -50 degrees ??

 

But I went ahead and changed mine at 4 years.

 

I flushed at 5 yrs and stayed with Dex-Cool on the re-fill.

It has received a bad rap from some people, most of whom are speaking out of ignorance or are just repeating unfounded rumors.

I do recommend keeping your coolant full. I keep mine full up to just below the "grid" you see after you remove the cap and look inside the tank. I also like to use distilled water to mix but clean drinkable tap water is OK too.
HTH

 

I'm changing ever 2 years... It's cheap should keep the cooling system flowing freely. $.02

 

On the Vette you do not have to worry about any DexCool problems. Here is a copy of a DexCool article that was printed in an auto industry trade publication back in early 2001. It addresses the reasons why people were having problems with DexCool. I bolded some interesting comments.

MACS 2001: GM and Texaco “Bare All” about DEX-COOL®
As in the past, the MACS 2001 Convention and Trade Show in Orlando provided some very interesting and helpful air conditioning information. However, the sleeper presentation at this show was not about refrigerant, but—of all things—engine coolant! (Sleeper does not refer to making you sleepy; it was anything but boring.)

Marketing departments of major consumer goods manufacturers are known for their attempt to conceal even a shred of negative publicity about their products. You can’t blame them; you do the same in your business. That’s why it was refreshing to witness a candid GM/Texaco presentation about DEX-COOL coolant and its related field service problems. I give the big guys credit for even bringing up the subject because, well, let’s face it, there are not a lot of kind words being spoken about this coolant at automotive service shops today. (Especially at radiator shops.)

Left: 14-Minute GM Training Video is now available to help technicians service known cooling system contamination problems in specific GM vehicles.

GM’s Jay Dankovich and Equilon Enterprises’ (Texaco) Stede Granger directed a 2-year study of thousands of DEX-COOL cooled vehicles. Armed with the results, they really didn’t have anything bad to say about the coolant. In fact, they strongly defended the product’s reputation. What they revealed to the audience is that specific models of GM vehicles have specific cooling system contamination problems. And essentially, that DEX-COOL is not the culprit!
Their presentation started with a 14-minute video that is now being circulated to technicians at GM dealers nationwide. In the video, GM’s trainers succinctly described the problems that have been found and the corresponding corrective actions to be taken by technicians.

Suggestion. This video is a “must see” for all technicians considering themselves antifreeze/coolant experts. Without this information, your cooling system service knowledge of late model GM vehicles is severely limited. Seriously!
Fortunately, you can buy the video for only $10 (plus S&H). Call MSX International of Auburn Hills, Michigan at 800-393-4831. Ask for the DEX-COOL Video: “Understanding Radiator Cap and Cooling System Contamination.” Part number: RADCAPK. Immediately following this article is a report on this training video by John Brunner, recently retired GM field service representative.

What was said at the presentation? Besides the video, Jay and Stede included their personal observations about the study. At the end, they fielded several questions from the audience. Here’s a recap of their entire presentation.

Keep the cooling system filled. In fact, fill the reservoir bottle to “Hot” level when the system is cold. Problems arise when a system’s coolant level is not maintained. (Fleet vehicles receiving regular maintenance, and with reservoirs kept slightly above normal, do not show signs of contamination. This even applies to the specific “problem” vehicles.)

The coolant problems found in this survey were caused by system contamination, and not due to the breakdown of DEX-COOL.

Check and keep the pressure cap clean and functioning. A contaminated and/or malfunctioning cap causes low coolant levels, which in turn causes overheating and a greater loss of coolant: the notorious vicious cycle. No matter what the vehicle, if the cooling system acts suspiciously, test the pressure cap.

On the ST vehicle models mentioned in the GM DEX-COOL video, you “must” replace all suspect radiator caps, especially those with a Drop-Center design, with a Stant Model 10230 or 11230 (Spring-Center type). (Just do it.)
Make sure that the coolant is at a 50-50 mix. Often, the flush water was not being removed from the engine block. Consequently, when a 50-50 mix is added to the system the resultant mixture could approach 30-70. Like any fluid that has been diluted beyond its recommended levels, the lowered level of inhibitors will not be able to protect the coolant system effectively. Low levels of inhibitors can cause pitting on aluminum surfaces and general corrosion of cooling system metals.

Left: Drop-center, “vented” radiator pressure cap. GM found this cap to be less helpful than a Spring-center cap in controlling the formation of contaminants in the cooling system. If contamination forms, the debris fouls the valve and restricts its ability to seal. In turn, the coolant boils at a lower temperature. Coolant loss is accelerated and so is the accumulation of contaminants.

Left: Spring-center, sealed radiator pressure cap. This is the preferred cap for GM applications that are more prone to accumulating cooling system contaminants.

A safe method of achieving a true 50-50 mix is to first determine the actual capacity of the system (use the owner’s manual). Then add 50% of “that” amount of undiluted DEX-COOL (or any coolant), and top it off with water.

Mixing a “green” coolant with DEX-COOL reduces the batch’s change interval to 2 years or 30,000 miles, but will otherwise cause no damage to the engine. In order to change back to DEX-COOL however, the cooling system must first be thoroughly drained and flushed.
Bacteria cannot live in a hot, Ethylene Glycol environment and is therefore not a threat to DEX-COOL.

While there have been intake gasket failures on CK Series, V8 powered vehicles for various reasons, DEX-COOL has never been found as a cause.

Use a refractometer to check the condition of DEX-COOL. Its inhibitor package is strong enough that if the batch still provides proper freeze protection, it is probably still providing proper corrosion protection as well.

DEX-COOL can handle the minerals in hard water better than silicated conventional chemistry coolants. Drinkable water is suitable for top off.

In ST Blazer applications where the radiator cap is mounted at an angle to the ground, the vehicle is more susceptible to radiator cap contamination and its related problems. The Stant 10230 is a wise choice for these vehicles.


Bill

 

Problems with Dex Cool are almost always due to air leaks in the system. So if you are loosing a lot of coolant, don't just keep filling it up, find the leak! Air will cause Dex Cool to turn thick and muddy. Cheap head gasket problems in some GM cars caused a lot of problems when they went undetected.

I stuck with Dex Cool, it lasted 5 years very well in my car.