Thread: What's the best coolant flush method?

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  1. #1 What's the best coolant flush method? 
    SE Level Member dl1027's Avatar
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    I have a Prestone flushing kit that backflushes with the water hose. I have tried some cleaners bought at AZ. I tried the Bobs the Oil guy dishwashing detergent method too but nothing can remove the dexcool sludge that is in the radiator and the rest of the cooling system. I'm getting a new radiator but want to clean the entire system before using the new radiator. Is there a product out there that will clean all the sludge out first try?
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  2. #2 Re: What's the best coolant flush method? 
    GTX Level Member cerick08GP's Avatar
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    On BITOG “they” recommend dishwasher detergent. NOT dishwashing detergent. There is a big difference.
    About the only method to get Dex out, is multiple drain and refills of the coolant. Just use plain (or DI if you like) water to fill it up. Drive it for a day, then repeat like 4 times. Then drain and use what ever coolant you had in mind. GL

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  3. #3 Re: What's the best coolant flush method? 
    The mod from over yonder TheOtherNick's Avatar
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    Wynns radiator flush kit and a power flusher at a shop.
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  4. #4 Re: What's the best coolant flush method? 
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    do you put the flush kit in the top heater hose into the firewall
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  5. #5 Re: What's the best coolant flush method? 
    GTX Level Member QUICKSILVER462's Avatar
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    He's right,
    drain, fill with water, drive a day,...repeat.
    To drain mine, all I did was use a long clear vynil hose pushed to the bottom of the radiator thought the cap opening, then siphon into empty jug (gallon or bigger).
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