Head Gasket ?
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Head Gasket ?

  1. #1
    Sit N' Spin Jetaholic's Avatar
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    Default Head Gasket ?

    What's the best head gasket material for aluminum heads? Composition, copper, steel wire ring?



    Quote Originally Posted by HammerDown
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    Sit N' Spin Jetaholic's Avatar
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    49 views and no replys? I know someone's gotta know something



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    Boat Nut sleekcrafter's Avatar
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    After running Mercruiser heads gaskets on my 540 for 7 seasons, My head builder suggested Cometics, less wear and tear on the head it's self.

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    Sit N' Spin Jetaholic's Avatar
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    Quote Originally Posted by sleekcrafter View Post
    After running Mercruiser heads gaskets on my 540 for 7 seasons, My head builder suggested Cometics, less wear and tear on the head it's self.
    Do you have a part # on the Cometics? It's for a BBC.



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    Senior Member H20MOFO's Avatar
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    My engine builder said cometics are great for boosted applications, and overkill for NA motors. ????
    Another Hot Boat refugee

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    Boat Nut sleekcrafter's Avatar
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    Quote Originally Posted by Jetaholic View Post
    Do you have a part # on the Cometics? It's for a BBC.

    heres the catalog...

    http://www.cometic.com/catalogs/AutoDomestic.pdf

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    Just another Wannabe Wannabe's Avatar
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    Overkill is an interesting term. They are a tad on the expensive side, when a lesser priced deal will seal just fine. But when I want good seal, I like the overkill idea.
    With the MLS style gaskets around, I really don't know why anyone would "O ring" a block and head any more. Keep them both flat and run a good gasket. If you are going to be throwing lots of boost at it, the self sealing SCE gaskets work great too.

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by Jetaholic View Post
    49 views and no replys? I know someone's gotta know something
    I don't know nuthin'.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
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    The rest of us are being dragged along kicking and screaming.

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    Senior Member Ahsumtoy's Avatar
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    When I built my 565ci all aluminum blown alcohol engine I tried cometics and they wouldn't seal. However, I used 1/2" head studs with a 4.600 bore that left very little room between the stud and the bore for sealing. I used SCE Titan gaskets and it did the trick.

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    Quote Originally Posted by SmokinLowriderSS View Post
    I don't know nuthin'.
    Sounds like you need to attend the school of Steelcomp



    Quote Originally Posted by HammerDown
    Kendall L-427 Super Blu...extreme-pressure (ep) lithium complex keeps my thrusting balls happy
    Quote Originally Posted by back2k5 View Post
    Well I am putting in a nice stereo system in the Carrera...maybe Ill put on some rap and turn the scoop sideways

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    felpro 1017 if you're not gonna run alot of boost or nitrous, they're composite gaskets with a ss ring, i've ran 12lbs of boost and up to 450hp of nitrous on em. most alum heads have 4.5 chambers , so whatever gasket you decide, make sure to check it against the head as well.

    Dare to be different, if it turns out great you can claim you planned it that way.

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    Quote Originally Posted by Ahsumtoy View Post
    When I built my 565ci all aluminum blown alcohol engine I tried cometics and they wouldn't seal. However, I used 1/2" head studs with a 4.600 bore that left very little room between the stud and the bore for sealing. I used SCE Titan gaskets and it did the trick.
    ordered a set of titans for the twin turbo 496 couple days ago hope they seal off, 30lbs of boost is gonna be hell to seal off with a factory block

    Dare to be different, if it turns out great you can claim you planned it that way.

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    What gasket was the block honed with originally?

    The reason I ask is that if it was honed with a standard type composition gasket, switching to an MLS style will distort the bore allot different. (MLS type being allot less) We have seen as much as .002 on a GM racing small block. This difference will vary depending on block used (cylinder wall and deck thickness) and stud/bolt location and hole type (blind hole vs. through ect.).

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    gn7
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    Quote Originally Posted by Warp Speed View Post
    What gasket was the block honed with originally?
    Didn't even ask, just assumed the thing was plate honed didn't ya. I smell a thread brewing!



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