The effect of wrongly mixing dexcool and green antifreeze greatly damages many components of your cooling system. Always ask a professional mechanic if you still need clarification about whether to mix the fluids into your radiator. However, it was labeled Dex-compatible, which assured me all would be fine. Personally, I have used the Dex-cool on my Silverado, and it worked fine. But cars manufactured in late 1990 forward actually require a 50-50 mixture between the two fluids. Most car owners before 1998 couldn’t mix both coolants without causing any harm to the vehicle. The obvious question is how to know what universal coolants are compatible with Dex cool. That said, wrongly mixing dexcool and universal antifreeze will produce a gel-like substance that can destroy the engine or cooling system and cause overheating. Today most universal coolant/antifreeze is compatible with Dex-cool than older green coolants. Can you mix universal coolant with dexcool? However, General Motors has noted that mixing universal antifreeze and dex cool will reduce the integrity of Dex-cool by more than 70% and require you to change fluids at regular intervals. It is generally in a 50-50 proportion shake them together and pour them into your radiator, which works perfectly. Some factors are essential to consider when mixing these fluids and will be examined in this article. Factory diagrams are much harder to read.If you are thinking of mixing universal coolant with Dex-Cool – You should stop and read this first to get your answer regarding can you mix universal coolant with dexcool? offers redrawn diagrams as well as factory diagrams. That saves a lot of time because you don’t have to refer back to the component locator or circuit locations. redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. If you’re tracking down a wiring issue, is the better choice. In most cases, their diagrams are right from the factory manuals. ![]() They include wiring diagrams and technical service bulletins. ©, 2017 Rick Muscoplat Posted on Octoby Rick MuscoplatĪ and are professional-grade shop manuals-period. ALL vehicle brands can suffer heater core failure if routine maintenance schedules aren’t followed. Electrolysis occurs when the anti-corrosive additives in Dex-Cool are depleted OR, if the a ground strap has been left off or has a poor connection. Erosion or too high a flow and electrolysis are the two most common causes of heater core failures. Early heater core failure is caused by failing to change coolant at the recommended intervals, mixing other coolants into Dex-Cool, removing a heater core flow restrictor. To avoid sludge, you must keep the system full so air doesn’t enter. But with the many different types of materials in modern engines, virtually ALL automakers not specify a certain type of coolant and further state that no substitutions can be used or any other type of coolant added to top off the vehicle.Ī faulty radiator cap, coolant additives and stop leak products, mixing a different coolant into Dex-Cool, running low on coolant or using Dex-Cool in an engine not approved for its use can all cause oxidation and corrosion that forms as a sludge. You may think that this alone means Dex-Cool is a bad coolant to use. NO OTHER COOLANTS can be mixed with Dex-Cool. GM approved brands include Dex-Cool coolants made by Chevron, Shell, Prestone, Valvoline, ACDelco and GM Vehicle Care. The ONLY coolants that can be added to Dex-Cool are those that have been licensed by GM. ![]() Dex-Cool compatible coolantsĮven though several coolant manufacturers state that their coolant are compatible with Dex-Cool. If a shop or owner fails to maintain the system, adds an incompatible coolant to top it off, or runs the vehicle too long without changing the coolant or runs the cooling system when low. Does Dex-Cool cause sludge?ĭex-Cool sludge is caused by neglect and not following directions. There have been class action lawsuits claiming that Dex-Cool causes gasket failure and sludge. It has been blamed for causing gasket failure and sludge buildup in cooling systems. Dex-Cool is an orange coolant is based on an organic acid technology that provides longer life than traditional silicate based formulas. Repair Topics > Cooling System Service > What causes Dex-Cool sludge What causes Dex-Cool sludge Dex-Cool sludge – Cause or effect?ĭex-Cool® coolant is a registered trademark for a coolant used in GM vehicles.
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