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Thread: Head Gasket thickness selection

  1. #81
    Grumpy Old Man
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    Default Re: Head Gasket thickness selection

    Quote Originally Posted by enjoyer View Post
    Ok, lets say i'm a dummy. I tried using this calculator , but somethings off http://charles.generationz.net/Supra...asketsize.html. If the stock HG is 1,37mm, we took 1,00mm from the block and 0,4mm from the head. Where does this leave me?

    1mm = 40 thou

    .4mm = 15 thou

    55 thou = 1.39mm, you add this to 1.37 to get 2.76mm, closest you'll find is a 3mm MHG, never seen a 2.8mm.

  2. #82
    Dang Dude! No Way Man.
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    Default Re: Head Gasket thickness selection

    Cometic can make it tho I'd rather use the hks.

  3. #83
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    Default Re: Head Gasket thickness selection

    Quote Originally Posted by IJ. View Post
    1mm = 40 thou

    .4mm = 15 thou

    55 thou = 1.39mm, you add this to 1.37 to get 2.76mm, closest you'll find is a 3mm MHG, never seen a 2.8mm.
    So, i actualy calculated corectly. Just wanted another opinion from the supra god, i mean IJ. So, i milled everything to fit a 3mm HG. OK,now the next question. I've red a lot of different discusions about HG manufacturers and still i'm not sure witch manufacturer is a better choise. I've got an option of custom made HG, but that's a bit expensive. If any of you have bought 3mm HG, could you give me any feedback, and where to look for them(with links for buying). I found some myself, but i just want some second opinions.
    7M-GTE inside. Lithuania, Klaipeda.

  4. #84
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    Default Re: Head Gasket thickness selection

    Ran a 3mm Cometic for many years here no probs at all.

  5. #85
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    Default Re: Head Gasket thickness selection

    Quote Originally Posted by IJ. View Post
    Ran a 3mm Cometic for many years here no probs at all.
    I've searched Cometic site more than once and i can't find what i'm looking for. They give only kits without any info on HG thickness.
    7M-GTE inside. Lithuania, Klaipeda.

  6. #86
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    Default Re: Head Gasket thickness selection

    PM Suprarich he stocks them.

  7. #87
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    Default Re: Head Gasket thickness selection

    Quote Originally Posted by IJ. View Post
    PM Suprarich he stocks them.
    Thanks
    7M-GTE inside. Lithuania, Klaipeda.

  8. #88
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    Default Re: Head Gasket thickness selection

    Awesome thread, great information. I am in the process of building another motor due to BHG.

    Is there a prefered material? I.e copper or MLS? That's assuming anyone does a Copper head gasket.

    Is adding a sealing agent a no no? I heard spray-on holymar was a good thing, anyone had experience with it?

    I'm yet to get the machining place to measure the head and block heights but have to wait until I get the pistons so they can do the boring and surfacing at once, before they can measure it for me

  9. #89
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    Default Re: Head Gasket thickness selection

    Use MLS - copper would have to be wired around the cylinder for a seal. Way too much work for zero gain.

    Never, ever use any kind of spray on sealer on a new MLS HG. It already has a viton coating - the spray sealer will destroy it.
    I will no longer respond to tech questions via PM. If you have a question, put it on the forum so everyone benefits from the answer.

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  10. #90
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    Default Re: Head Gasket thickness selection

    Thanks for the reply jdub.
    What do you mean by wired around the cylinder?

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