Removing Radiator Scale Buildup???
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Removing Radiator Scale Buildup???

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    Super Moderator HammerDown's Avatar
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    Default Removing Radiator Scale Buildup???

    Though I'd ask here, is there anything magical and SAFE to use for removing scale buildup in an older brass/copper type radiator?
    Maybe CLR, vinegar, muriatic acid, hydrochloric acid etc???
    Thanks for any feedback
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    Senior Member EVILFORCE's Avatar
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    In the old days when they fixed radiators they removed the tanks and ran rods down the tubes. Hence rodding out a radiator. If there was something that would work I am sure they would have done it rather then take it apart. Might try CLR. It does remove scale. Dint know if it would plug it up with sediment.

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    gn7
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    Quote Originally Posted by HammerDown View Post
    Though I'd ask here, is there anything magical and SAFE to use for removing scale buildup in an older brass/copper type radiator?
    Maybe CLR, vinegar, muriatic acid, hydrochloric acid etc???
    Thanks for any feedback
    Hammer, nothing you do will equal having a rad shop take it apart and rod it.
    There are couple things that will help. CLR is one. The other is to get descaling chemicals from a HVAC shop or supplier that deals in water cooled systems. HOWEVER, any of the good methods will require 3 steps, including a neutralizing step, and you need to be a little careful with the stuff. You used to be able to buy very similar kits at the auto stores, BEFORE THE EPA gestopo to over. They were usually two step.

    Even if you use CLR, I would flush the hell out of the system after you drain it.

    Also, be aware that anything you do will go after metal that is compromised. Including the freeze plugs. Never flushed a radiator that a steel freeze plug didn't fail soon after.



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    Super Moderator HammerDown's Avatar
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    Quote Originally Posted by gn7 View Post
    Hammer, nothing you do will equal having a rad shop take it apart and rod it.
    There are couple things that will help. CLR is one. The other is to get descaling chemicals from a HVAC shop or supplier that deals in water cooled systems. HOWEVER, any of the good methods will require 3 steps, including a neutralizing step, and you need to be a little careful with the stuff. You used to be able to buy very similar kits at the auto stores, BEFORE THE EPA gestopo to over. They were usually two step.

    Even if you use CLR, I would flush the hell out of the system after you drain it.

    Also, be aware that anything you do will go after metal that is compromised. Including the freeze plugs. Never flushed a radiator that a steel freeze plug didn't fail soon after.
    Great suggestions...thank you.
    being more worried what CLR 'may' do to the water-pump I never though about the freeze-plugs being hurt too!
    So maybe I just drain and plug the radiator and treat that...never letting the mix enter the engine.
    Researching a little more > > > I believe a box of Baking Soda neutralizes the CLR.
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