BBC head gasket
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BBC head gasket

  1. #1
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    Default BBC head gasket

    Does any manufacturer have a .021 steel gasket that will fit a 4.031 bore? What is the best sealer for steel?

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  3. #2
    gn7
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    SCE has a copper 4.060
    Mr Gasket has a steel that is .018 with 4.100 bore.

    Most of the gaskets you find will be 4.100



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    We carry a 4.100" coated stainless gasket .020"
    We carry a 4.130" graphite shim gasket .028"
    Chris Straub
    Straub Technologies

    3HP is an A$$ Whooping!!! JW

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    Quote Originally Posted by BadBehavior View Post
    Does any manufacturer have a .021 steel gasket that will fit a 4.031 bore? What is the best sealer for steel?
    Could you mean 4.31? Don't know of any BB Chevys with 4.03 bore.
    If God is your co-pilot, change seats!
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    Is it ok to run copper without o-rings/receiver groves?
    Another Hot Boat refugee

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    Quote Originally Posted by H20MOFO View Post
    Is it ok to run copper without o-rings/receiver groves?
    Sure,, make sure to seal around water ports. I use a thin coat of hi temp silicone (it goes on thinner than regular silicone)

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    Quote Originally Posted by obnoxious001 View Post
    Sure,, make sure to seal around water ports. I use a thin coat of hi temp silicone (it goes on thinner than regular silicone)
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    Quote Originally Posted by H20MOFO View Post
    Is it ok to run copper without o-rings/receiver groves?
    Personally I wouldn't. I tried it once when I was very young and vey dumb on a mild SBF and didn't work out well at all. There is reason gaskets have a fire ring.



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    Quote Originally Posted by steelcomp View Post
    Could you mean 4.31? Don't know of any BB Chevys with 4.03 bore.
    I'm thinking its a SBC. Probably for a SE, thinking he is going to gain some compression with a gasket that's no bigger than needed to clear the bore.
    just a wild ass guess.



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    Last edited by gn7; 01-28-2014 at 12:02 PM.

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    Quote Originally Posted by gn7 View Post
    I'm thinking its a SBC. Probably for a SE, thinking he is going to gain some compression with a gasket that's no bigger than needed to clear the bore.
    just a wild ass guess.
    Yeah, except the title of the thread is "BBC head gasket"...
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    Quote Originally Posted by gn7 View Post
    Personally I wouldn't. I tried it once when I was very young and vey dumb on a mild SBF and didn't work out well at all. There is reason gaskets have a fire ring.
    I have only done it once or twice, when I wasn't so young. Must have been to get a specific gasket thickness, but no problems reported. I think one was a mild marine blown engine.

    I probably should have asked "why?" as a preface to my reply, there are lots of alternatives that won't require as much time and care to install. I have one high compression dirt track engine that I build that we still run copper head gaskets on.

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    Quote Originally Posted by steelcomp View Post
    Yeah, except the title of the thread is "BBC head gasket"...
    MMMMmmmmmm
    .100 over 366 truck?? Naw!

    You don have to ask yourself, whats with the 4.031



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    Last edited by gn7; 01-28-2014 at 12:39 PM.

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    Quote Originally Posted by obnoxious001 View Post
    I have only done it once or twice, when I wasn't so young. Must have been to get a specific gasket thickness, but no problems reported. I think one was a mild marine blown engine.

    I probably should have asked "why?" as a preface to my reply, there are lots of alternatives that won't require as much time and care to install. I have one high compression dirt track engine that I build that we still run copper head gaskets on.
    I dont wanna jack this guys thread....but it caught my eye because I have wanted to improve the quench on my 557 with a similar thickness gasket. I had never heard of quench when it was put together. My ex motor guy left me about .022 in the hole. I am pretty sure my block isnt currently smooth enough for an mls type. I knew you could get copper in a variety of thickness....but assumed it needed to be o-ringed ect. I have periodically heard the term shim thrown out there. I have zero clue if a shim can be used instead of a gasket....or if they were meant to be used with a gasket. Hopefully at least some of the things I am asking the OP would want to know also.
    Another Hot Boat refugee

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    Quote Originally Posted by H20MOFO View Post
    I dont wanna jack this guys thread....but it caught my eye because I have wanted to improve the quench on my 557 with a similar thickness gasket. I had never heard of quench when it was put together. My ex motor guy left me about .022 in the hole. I am pretty sure my block isnt currently smooth enough for an mls type. I knew you could get copper in a variety of thickness....but assumed it needed to be o-ringed ect. I have periodically heard the term shim thrown out there. I have zero clue if a shim can be used instead of a gasket....or if they were meant to be used with a gasket. Hopefully at least some of the things I am asking the OP would want to know also.
    If it has aluminum heads, I don't recommend running a embossed steel shim gasket.



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