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  1. #1

    Do you always need a new head gasket?

    Recently did a top end job on my buddie's Yamaha 1200 SUV and installed a new head gasket (the multi-layered metal material one). I was told to use the aerosol copper gasket spray to spray 2 thin layers on each side in lieu of using any sort of copper gasket sealant in a tube. When our top end job failed due to there being a crack in the bottom of the block that we missed I was told that we would need to use a new head gasket for the rebuild by our mechanic that did the job.

    Two questions:
    1. Was he full of it?
    2. If a person is careful removing the head, can a head gasket be re-used?

    Not trying to be cheap here...just curious if our tech was off on this info. It seemed strange that you can't re-use a head gasket that has only been compressed but never used.

    Oh yea, one more question. I am reading quite a bit on people putting a thin layer of grease on each side of their gaskets. Would this be something that would be smeared on the head gasket after the hi-temp copper is sprayed on?


  2. #2
    Wake junky Gp1200R's Avatar
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    If its the high quality metal gasket I wouldn't see why not...

  3. #3
    Happily Self-Employed WFO's Avatar
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    I dont use that copper spray... it can clog small cooling ports

    I use a thin layer of grease... as long as the grey material isnt peeling, IMO you can re-use the gasket

    If you already sprayed it with copper coat, then you should probably start over with a new one

  4. #4
    mudslanger's Avatar
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    I have done it both ways and haven't had any problems you can respray the copper coat just make sure you clean it properly. Don't leave any blobs on the surfaces.

  5. #5

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    inspect the gasket carefully, you can reuse it. actually a leak down test will tell you if you should reuse it or not


    I use a thin layer of grease... as long as the grey material isnt peeling, IMO you can re-use the gasket
    gease on gasket? that is new to me, just regular marine gease? I would like to try it, bet it make the gasket look like new and remain flexible.

    I dont use copper spay either, I think when it dries, it set. it will be harder to reuse the gasket.

  6. #6
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by birdgod View Post
    inspect the gasket carefully, you can reuse it. actually a leak down test will tell you if you should reuse it or not

    gease on gasket? that is new to me, just regular marine gease? I would like to try it, bet it make the gasket look like new and remain flexible.

    I dont use copper spay either, I think when it dries, it set. it will be harder to reuse the gasket.
    yeah, just waterproof grease

  7. #7

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    just put it on very thin and it is only for the head gasket right?

  8. #8
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by birdgod View Post
    just put it on very thin and it is only for the head gasket right?
    yes

    head, cyl base, exhaust, aftermarket reed gaskets, ect

  9. #9

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    Quote Originally Posted by WFO View Post
    I dont use that copper spray... it can clog small cooling ports

    I use a thin layer of grease... as long as the grey material isnt peeling, IMO you can re-use the gasket

    If you already sprayed it with copper coat, then you should probably start over with a new one
    plus copper and alum. + saltwater makes a great battery if your in that part of world

  10. #10
    "just sayin".. jetdave56's Avatar
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    Quote Originally Posted by WFO View Post
    yes

    head, cyl base, exhaust, aftermarket reed gaskets, ect
    Yes too...all mating parts.., both sides of gaskets.... both sides of metal surfaces,..but a thin coat of the grease...use a paint brush...never leaked or went lean....

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