Cast alloy repair
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Thread: Cast alloy repair

  1. #1
    Fellow Frogger! Dano's Avatar
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    Default Cast alloy repair

    The heater tap body on the 404 is stuffed. I have a secondhand one which is better, but it is showing signs of corrosion internally and a little where the hose has been sitting. The image below is the existing one.



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    My thinking is/was, is there an epoxy of something that would,
    A. Adhere to the internal surface.
    B. Be heat resistant
    C Will this idea work/solve the problem long term.

    Any thoughts/input would be greatly appreciated.

    Cheers,

    Dano
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  2. #2
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    It can depend on how bad it is. Refrigeration suppliers carry epoxy sticks that are used to patch and plug aluminium evaporator coils. This might do. It is extremely difficult to do anything soldering or brazing with die cast zinc alloys.

    The ultimate repair for a concourse-like finish is to clean it up and get it copper plated. This will accept solder.

  3. #3
    1000+ Posts driven's Avatar
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    Get the best stuff for this

    https://www.muggyweld.com/product/super-alloy-1/

    Expensive but can even repair a hole in a VB can

    https://youtu.be/D5Xz9Y97zvI
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  4. #4
    1000+ Posts Peter Chisholm's Avatar
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    Don't suppose anyone has a good one laying around?

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    Are you sure Muggyweld will do die cast alloy? Is it not for aluminium?

  6. #6
    Fellow Frogger!
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    Hi,
    muggyweld.com have several sticks and say Super Ally 1 will solder these metals.
    I have used the aluminium repair sticks and they really are as good as claimed.
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  7. #7
    1000+ Posts schlitzaugen's Avatar
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    How hard would it be to machine that thing out of say brass or aluminium and be done with it forever?

    I don't see how you will ever clean the internal corrosion properly like they show in that video.

    As an epoxy for external use you could try JB weld or similar.

    Even simpler, how about using a more modern part from another car?
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

  8. #8
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    That corrosion is in the heater control valve it will be clogged up inside and not repairable buy a new valve bolt it to the copper heater radiator and pressure test.

  9. #9
    Fellow Frogger! Dano's Avatar
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    Thanks for all the responses.

    Certainly plenty of options to think about.

  10. #10
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    Devcon make some good putties that might work.


    2003 PEUGEOT 206 GTi

  11. #11
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    Do Muggyweld have an agent in Australia?

  12. #12
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    Hi,
    I bought the aluminium sticks I have used, via a website in NZ. It wasn't actually the Muggyweld brand, but they are all the same thing.

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