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Thread: Phosphoric Acid in radiator?
          
   
   

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  1. 09-27-2009 05:51 PM #1
    BigTruckDriver
    BigTruckDriver is offline CHR Member/Contributor
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    Phosphoric Acid in radiator?

     



    I have been playing with this stuff but while researching it I see you could put in your radiator to clean out the rust. Has anyone tried this?
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  3. 09-28-2009 04:55 AM #2
    R Pope
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    Might be hard on water pump seals, heater valves, and composite gaskets.
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  4. 09-28-2009 07:17 AM #3
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    Mike52
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    Don't know the boiling point and how it changes under pressure, but it's used in food processing so it should be safe for seals, valves, etc.
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  5. 09-28-2009 08:59 AM #4
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    HWORRELL
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    Flush the radiator. add your phosphoric acid and fill radiator with water and run till hot.Drain and flush.Add 1/2 box of baking soda,fill radiator and run till hot,drain & flush,refill with 50/50 antifreeze and water.
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  6. 09-30-2009 08:08 PM #5
    paul274854
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    White vinegar is supposed to be a very good cleaner for rust and crud. Fill with the vinegar, run it a couple of days and drain. Flush good with water.
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