350 Intake end gaskets, use or not?

Discussion in 'Small Block Tech' started by koosh, May 4, 2021.

  1. koosh

    koosh Well-Known Member

    Talking with an engine builder, he always throws out the rubber front and rear intake gaskets, and instead uses large bead of the Gray Permatex gasket maker....any thoughts or advise?
  2. alec296

    alec296 i need another buick

    This is done often when block or heads have been milled. If he’s gonna stand behind the work it should be fine.
    I have done it myself.
  3. koosh

    koosh Well-Known Member

    Lol...I'm doing the rebuild...theres no milling involved. Just was instructed the rubber end gaskets were junk
  4. Buick#455

    Buick#455 Well-Known Member

    Always throw away those gaskets, they are ****! I use the tight stuff, that's my preference
  5. Max Damage

    Max Damage I'm Working on it!

    I think the conventional wisdom is to use the end seals if the geometry hasn't changed. Then just a dap of sealant at the edges.
  6. sean Buick 76

    sean Buick 76 Buick Nut Staff Member

    I use the end seals. I install them with “the right stuff” of both sides. Torque it to just 10 foot pounds and let it cure overnight before I fully tighten the bolts. The biggest issue is people fully tightening the bolts before the sealant is cured, the seals will spit out.
  7. koosh

    koosh Well-Known Member

    Forgot to ask.....should I be using a certain kind of thread sealant on the intake bolts? What about head bolts?
  8. alec296

    alec296 i need another buick

    No sealer on threads of bolts, some go into blind holes and will hydolock maybe the 2 very center but I never do.
  9. koosh

    koosh Well-Known Member

    Are you referring to the intake bolts?
  10. alec296

    alec296 i need another buick

    Yes the intake bolts, head bolts use wd40 or very light oil.
  11. MrSony

    MrSony Well-Known Member

    I have taken to shaving the ridge on the end seals off with a sharp knife. I find it virtually eliminates any chance of squeezing out or sucking in. I also use that indian head gasket glue stuff. put it on, let it get sticky, dab some rtv in the corners under the heads, slip the things on, rtv on top of the seals under the heads, goop some glue on, let it get sticky, then set the intake on. do a few rounds of tightening the bolts hand tight and let it sit for a bit. then torque. retorque after running for the first time.
    sean Buick 76 likes this.

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