I would not use Dexcool in a vehicle where it came with something besides Dexcool from the factory.Ī flush at PepBoys would likely get you a flush using tap water and universal coolant added. With ethylene Glycol or Green coolant, if spilled it is poison to any. The formula is such that if it is exposed to air, it neutralize itself. But DexCool chemistry behind DexCool is such that it will not harm the environment if there is an accident or leakage. And change the coolant as listed in owners manual. DexCool is a required coolant in most all GM vehicles after 1995, if Im not wrong. And you have to make sure cooling system is air tight. There were issues with a few engines that needed some new design gaskets. Your article and the discussion of problems is very old news. Prestone 50/50 Prediluted Antifreeze/Coolant with Cor-Guard is compatible with ANY antifreeze/coolant, regardless of color, and can be used in ALL makes and models of cars and light duty trucks. Peak Global Lifetime is the same coolant minus that chemical. Prestone 50/50 is a blend of concentrated antifreeze/coolant and demineralized water. Https:/ / news04/ 2006/ 08/ gm_dexcool.htmlĭexcool contains an aggressive plasticizer chemical. GM has been having problems with Dexcool since they started using it in 1996. Lets say you keep cruising with Dexcool mysterious problems will happen like a leak in the radiator.a leak in the coolant reservoir.etc. Pepboys seems best equipped around here to perform these fluid flushes. The best thing you can do is get the "Dexcool" coolant flushed and replaced with Peak Global Lifetime. Im in the livery ed to own a Suburban.know a lot of people with these vehicles. The system is still clean all round with zero issues at 135,000 miles, which is stil less than half that of the Avalanche. I flushed out the factory coolant on the Envoy when I replaced the factory thermostat at 56,000 miles and again when I replaced the water pump at 115,000 miles. Top up everything else with your second coolant-G-05 or conventional American. I no longer have the Avalanche, but I personally know the person who now has it with 293,000 miles now and he's got no issues with it either. Top up with DexCool in GM and VW/Audi vehicles, and '98 Chrysler L/H cars or the '99 Mercury Cougar, if you get one with the original coolant or DexCool. thermostat or water pump, the system was thoroughly flushed and back flushed and refilled with premixed Dexcool. Whenever a cooling system repair was performed, e.g. The LM7 5.3L I had on an old Avalanche didn't cause me any grief, nether did the LL8 4.2L in my Envoy, both of which have been running Dexcool since they left the factory. I, personally, have never had a problem with Dexcool. Newer gasket material, primarily HNBR with aluminum frames addressed the problem, but until that point both GM and some aftermarket manufacturers were paying for warranty claims. The plastic would soften, swell and eventually leak. The root cause was air in the system, which caused acid to form when mixed with the coolant and attacked plastic carrier gaskets. By the early 2000s, manifold gasket failures on the 3.1L/3.4L as well as 4.3L, 5.0L and 5.7L using plastic carrier gaskets with moulded silicone was common. I just found out there are three types of coolant, IAT, OAT and HOAT and I don’t even know what is this green stuff I got.Back in '96, GM made the "mistake" of calling Dexcool a "lifetime" coolant. He showed me a jug of “Prime by Prestone” green low silicate coolant that meets ASTM requirements or something like that. I asked to see the green coolant he was going to use after flusing the dexcool out. He says he do flushes all the time, and use these two coolants without a problem. He basically told me green and orange is the same to him. I don’t think he knows much about coolants. So I had a shop flush the dexcool for me but when I asked about the coolant he was going to put in, he told me to choose either orange or green.
No matter where I ask, who I ask almost everyone seem to hate Dexcool with a pasion. Back in 1995, GM began to use Dex-Cool coolant in its vehicles in fact, you may very well be driving a vehicle. I am not a mechanic, the idea of my coolant turning into sludge whenever it comes it contact with air is a headache I don’t need. 11,300 owners of 1995-2004 GM vehicles are nearing the end of a long road. It can be used in limited quantities for top off, but the OEM coolant is the G-05 type, which has a different additive chemistry from DexCool and the traditional green coolant. So I drained and added Dexcool but I was worried about that muddy stuff in my recovery tank. Chrysler specifically warns against using DexCool in our engines. I initially planned on keeping the Dexcool, I needed the car ASAP.
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