Jeep Maintenance |
Maintenance vehicle came with the inferior green stuff, you must do a complete and thorough flush before switching to Dex-Cool. Also make sure to stay away from 'organic based' rust inhibitor additives. They originated in Euro/Asian markets and are not compatible with Dex-Cool. These additives may cause gumming of the antifreeze. OEM style additives designed for use with the green antifreeze (propylene glycol) may reduce the durability of Dex-Cool. If you started off with green, GM recommends switching to Dex-Cool in their technical service bulletins.
Jeep Maintenance Features- The primary limiting factor in the shelf life of a coolant is silicate instability. Since silicate will eventually polymerize to silicate gel, all traditional [green] coolants have a shelf life of about 18 months. Dex-cool is silicate-free and therefore can be stored for at least 8 years without a problem, provided the container holds up.
- As for deciding when to change your antifreeze, don't go by miles or you WILL certainly have seal and mechanical failures. One interesting spec I found is to use a multimeter. You put your negative probe to the negative post on your battery. You then place the positive probe in the neck of your radiator, making sure that the positive probe touches nothing but the antifreeze.
- Make sure the coolant is warm but not HOT (this is for SAFETY reasons as well as accuracy of your readings. Always be careful when opening the radiator cap on a warm engine).
- Another way to ensure longer life of parts and get better corrosion protection is to make sure you USE DISTILLED WATER when mixing with antifreeze. By just using regular tap water you contaminate the new Dex-Cool and drastically lower the corrosion protection.
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