Dex-Cool is an ethylene glycol coolant that was introduced in late 1995 with the 1996 model year vehicles produced by General Motors. It was a derivative of the original formulation of coolant that eliminated silicates and phosphates from the formula, in order to extend the life span of the coolant. However, the chemicals that replaced them would soften some seals, and didn't handle an imperfectly maintained system. The orange coolant quickly gained a reputation for causing cooling system issues, but wasn't entirely to blame...

Dex-Cool is still used by GM today, still a factory fill for new vehicles. One way or another, the issue has been resolved, but it's still an important part of GM history, and, in Steve's opinion, a story worth sharing.

Chapters:
0:00 Introduction & What is Dex-Cool
1:09 Why Use a Different Coolant?
3:22 Perfection Required
5:10 All Roads Lead to Failure
6:54 Orange Bailout
8:40 New GM, Same Coolant
9:32 Closing Thoughts

The General Motors chapter 11 bankruptcy filing played an important role in the story of DexCool, but the full story of that and the Motors Liquidation Company (MLC) is a tale for another video.

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Cars Simplified is a show dedicated to automotive education, including DIY repair, automotive news, auto industry changes, automotive technology, performance modifications, and more, all presented in a friendly and easy to digest manner!

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Main Sources:
GM Technical Service Bulletin 05-06-02-002B
Texaco DEX-Cool Antifreeze: [ Ссылка ]
GM DEXRON Trademark: [ Ссылка ]
GM DEXRON Web Site: [ Ссылка ]
Coolant shelf life depends on if the bottle is sealed: [ Ссылка ]
Penray DEX-Cool FAQ Information PDF: [ Ссылка ]
Coolant Confusion: [ Ссылка ]
DEX-Cool Lawsuit Pending: [ Ссылка ]
DEX-Cool Lawsuit: [ Ссылка ]
DEX-Cool Lawsuit Finished: [ Ссылка ]
DEX-Cool MSDS: [ Ссылка ]
Old GM Cut Up After Bankruptcy: [ Ссылка ]
Old GM Dumps Liability: [ Ссылка ]

Other Sources:
Additional Dex-Cool Information: [ Ссылка ]
Patent for Improved Surge Tank Material: [ Ссылка ]
Hot Rod on using Dex-Cool, 1997: [ Ссылка ]
Coolant type timeline: [ Ссылка ]

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