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Installing New Copper Exhaust Seals?

Discussion in 'Engine & Transmission' started by Aspudis, Nov 23, 2018.

  1. Aspudis

    Aspudis Member

    Messages:
    38
    Location:
    Central Coast, NSW
    Hi.
    Can anyone tell me if I need to anneal the oval shaped copper exhaust manifold seals/gaskets before installing them in the engine? If so how long do you heat them for? Do you just use a gas blow torch?

    The mechanic I bought them off said they just go straight in as is?

    Also, how do you get them to stay in place while you remount the heater boxes? They just keep falling straight out.

    Thanks, Nathan
     
  2. tintop

    tintop Active Member

    Messages:
    115
    Location:
    Canberra
    Hi Nathan, I don't anneal them (some people do). I keep mine in place with a wipe of 'permatex ultra copper' sticking them to the heater box. Patrick
     
  3. Mellow Yellow 74

    Mellow Yellow 74 Active Member

    Messages:
    812
    Location:
    Sydney
    When I replaced my heater boxes I installed them without annealing but they leaked so I removed them and annealed them and they sealed ok.

    I used a little propane torch until they were red hot and let them air cool. I put a little bit of grease on them to make them stay in place on the heater box when I fitted them.
     
  4. Mordred

    Mordred Super Moderator Staff Member

    Messages:
    2,705
    Location:
    Penna, Hobart
    I agree with annealing. Heat up to cherry red then drop them in a bucket of cold water, or air cooling works as well. This is for non ferrous metals only as with ferrous you need them to cool slowly to anneal them.

    Being softer they will bend to fit better with any unevenness with the port in the head and the manifold.

    Adrian
     

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