Carburettor bAse gasket
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  1. #1
    Fellow Frogger!
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    Default Carburettor bAse gasket

    hello
    is it ok to use a base gasket (between carb and manifold) made of cork?
    thx

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  2. #2
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    It would probably work, but cork is usually used for joints that aren't required to be too tight, such as rocker covers, because it can squash down. In the past I've made carb gaskets out of thin card from a breakfast cereal packet, with a very thin smear of grease on the mating surfaces. It works well.

    You can transfer the pattern to the card using grease as well. Smear it on the manifold and then press it on the card firmly like a rubber stamp. Then cut around the imprinted shape, and punch out the holes. I use engineers blue for this, but grease works.


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  3. #3
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    I have gaskets but i suspect the mating faces aren't flat.

    Carburettor bAse gasket-image.jpg
    Last edited by 2pac; 21st October 2014 at 01:42 AM.

  4. #4
    1000+ Posts driven's Avatar
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    The pic looks like nitrile impregnated cork gasket

    Never use plain cork gaskets for diesel fuel exposure, must be nitrile impregnated cork gasket or they will weep and.....smell

  5. #5
    1000+ Posts Wildebeest's Avatar
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    2pac,
    The usual 'gasket' for twin choke, Solex or Weber is a 3 or 4mm thick fibre insulating spacer incorporating a gasket on either side.
    This should take up minimal distortion.
    The ins spacer is necessary to keep heat away from carburettor.

    Your local go faster shop should be able to supply this.

  6. #6
    1000+ Posts jo proffi's Avatar
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    Quote Originally Posted by 2pac View Post
    i suspect the mating faces aren't flat.
    measure them with something flat and if they are not flat, fix the shape back to flat if there is enough material for you to do so.
    Once you know they are warped, you can make up a tool and work them flat.
    Something a bit like this...https://www.youtube.com/watch?v=mc_gaGAf2pk

    Lapping aluminium by hand is easy, and assuming you dont screw it up, a satisfying job that will make your car run a whole lot better.
    Jo
    Last edited by jo proffi; 21st October 2014 at 06:46 PM.

  7. #7
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    Wildebeest, mine is the single chock solex.

  8. #8
    Too many posts! JohnW's Avatar
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    Quote Originally Posted by 2pac View Post
    Wildebeest, mine is the single chock solex.
    Single or double choke, all the logic here is the same. Get it flat, use what Wildebeeste suggests and be very careful not to overtighten. I'm against soft cork in this application as it is hard to get the nuts tight enough to stay attached without heavy compression under the nuts and, I suspect, a greater propensity to warp the carbie base. Better to have a thin gasket and a firm, insulating base against which to tighten that carbie flange. The carbie bases stay pretty flat if not overtightened in my experience but who knows what previous owners have done!
    JohnW

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  9. #9
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    and what's the deal with the grease as stuey suggested?

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