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Copper Washers

Discussion in 'General Technical / How To' started by PAULF, Sep 4, 2012.

  1. PAULF
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    PAULF Active Member

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    [Sep 4, 2012]
    I just thought I'd post an old trick for recovering copper washers (such as around fuel lines or injector pipes) after dismantling unions. (As I didn't practise what it preach and had a leak recently.....)

    The copper will have most likely work-hardened, so hang it on some wire - or a **** screwdriver - and then heat it until it glows red.

    Small washers will get hot enough over a lighter, big, heavy washers may need a gas ring (if the Missus lets you!!)

    Then drop it into cold water to anneal it.

    One washer fit for reuse. :thumbsup:
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  3. snapon
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    snapon Member

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    [Sep 14, 2012]
    doesn't dropping it in the cold water make it go brittle due to the rapid change in temperature?
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  4. PAULF
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    PAULF Active Member

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    [Sep 15, 2012]
    You're thinking of steel and hardening.

    Copper softens when quenched (I actually think it may also soften if left to air cool - can't remember now) as the crystalline alignment is different - try and bend an old washer, heat and quench, then try again and see the difference. If you bash it a bit with a hammer, it will harden again.
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