Rick's Free Auto Repair Advice

Posts Tagged: DexCool

Is DexCool bad

DexCool problems Mechanics say they hate DexCool and blame it for all kinds of problems. Most aren’t the fault of DexCool. Here’s the REAL scoop on Dex-Cool and coolants in general. First some history Most of the older green coolants were silicate based. Their primary job was to prevent freezing. But they also had additives to prevent corrosion. In the case of the green coolants, the silicates deposit on metal surfaces to “PASSIVATE” them. In other words, the silicate coats the metal parts to prevent electrolysis. The problem with silicate … Read More

Is Chrysler antifreeze compatible with other types

New Chrysler antifreeze not compatible with other antifreeze types Chrysler has issued a TSB #07-004-12RevA regarding their new organic acid technology (OAT) coolant for 2013 vehicles. The new coolant is good for 10 years or 150,000 miles. The new coolant is purple. BUT, the bulletin warns about not mixing any other coolants with the purple stuff. And it’s not just so Chrysler can sell you their own brand. Chrysler has found that mixing coolants can accelerate corrosion in the engine and cooling system, develop an ammonia smell, and result in … Read More

Which antifreeze do I use?

Which antifreeze do I use There are many different types and colors of antifreeze. But only one is right for your particular engine. Using the wrong antifreeze or mixing different types of antifreeze can damage your engine and cooling system. When people ask this question I always answer the same way. Use what the car maker recommends. There is no such thing as a universal coolant. So, if you own a late model GM vehicle, use DexCool. For any other car brand, go to the dealer and buy the factory … Read More


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