Proper Procedure for Flushing Coolant system
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This is a discussion on Proper Procedure for Flushing Coolant system within the Maintenance, service, and repair forums, part of the Tutorials & DIY category; I know this thread is lurking out there somewhere and I just can't seem to uncover it. Anyway, like the ...

  1. #1
    Registered User
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    Sep 2007
    Millersville, PA

    Proper Procedure for Flushing Coolant system

    I know this thread is lurking out there somewhere and I just can't seem to uncover it. Anyway, like the title says, I'm looking for a DIY that explains the steps needed to properly drain the coolant from your motor and radiator, and then refill it.


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  3. #2
    Moderator YBNormal07's Avatar
    Join Date
    Jul 2003
    I Support ClubWRX
    Buy a flush kit from you local autoparts/hardware/walmart and follow the directions.

    Be sure to have a large container to collect the old coolant. Dispose of it at your local gas station.

    It's pretty simple really. Open the fill cap, open the drain-****, let old coolant drain as much as possible without adding new water (you can even start the car to make it drain faster...won't hurt it as long as you are watching your temp gauge/light and listening for water pump noise). Once stopped draining, flush with fresh water. Let drain. Once stopped draining, flush with fresh water, fill up, start car, let circulate until clear out of drain, let drain completely, close drain ****, fill with selected coolant and DI/RO/Distilled water mix, close fill cap. Start car, let circulate to remove air bubbles, stop car. Open fill cap, check level, fill again as necessary.

    Many coolant fluids are poisonous, and if glycol based, smells and tastes sweet to animals and children, so be sure to dispose of it properly.
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