[Question] Silicone ?
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Silicone ?

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    Senior Member SBS933's Avatar
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    Default Silicone ?

    I have always used RED RTV HIGH TEMP. Silicone on the ends of my Intake Manifold (454 BBC) Is there something out there that is better ? Also what should I put on the threads of my Headbolts ?

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    Senior Member EVILFORCE's Avatar
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    Quote Originally Posted by SBS933 View Post
    I have always used RED RTV HIGH TEMP. Silicone on the ends of my Intake Manifold (454 BBC) Is there something out there that is better ? Also what should I put on the threads of my Headbolts ?

    Head bolts. I use a liquid Teflon. I never use red rtv. It does not stick like a good black regular sealer. Black is beautiful baby.
    No Fool Like A Old Fool is there?

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    Senior Member Mojave85's Avatar
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    Right Stuff is the best thing on the market. Ditch the rubber gaskets on each end and run a bead in their place. Much better than red silicone.

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    Senior Member jet pilot's Avatar
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    Cool

    Quote Originally Posted by SBS933 View Post
    I have always used RED RTV HIGH TEMP. Silicone on the ends of my Intake Manifold (454 BBC) Is there something out there that is better ? Also what should I put on the threads of my Headbolts ?

    I use the black High temp stuff on the valve cover gaskets and the liquid Teflon on the head bolts, no leaks ever...

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    21 Daytona Outlaw's Avatar
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    Mopar Part #82300234 is the best stuff made, oil and gear lube will not break it down
    #55

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    Senior Member Alter Ego's Avatar
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    I either use permatech right stuff black, or clear silicone by versachem at the parts house. never had an issue out of the clear.
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    Member Suprstreet's Avatar
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    Right Stuff!!!!
    Black silicone seems to always eventually lose its seal and leak at the intake manifold ends.
    Only problem with Right Stuff is it can be hard to disassemble.

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    Default Low tech, backyard....

    I'm just a low tech, backyard kinda guy, but I use whatever silicone I have for everything... If I have red, I'll use it everywhere. Same with blue, or black.... My last assembly I used the sticky sided cork, and a bead of red, on the ends of the intake, but only because I used 1/8th inch intake gaskets and the intake was sitting kinda high... The head bolts; beware of anything you put on the threads, it MAY change the torque results... Yeah, I know they need to be sealed to prevent leaks, but there are torque lubes, sealers, and torque lube sealers in the same tube.... I think ARP has a newer product out now that does both...
    Ray
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    i use regular ol black silicone on mine, but before setting the intake manifold in i put a bead across the front and back and then let it skin up for a good 15-30 mins. otherwise all youre doing is setting it down and squishing it all out. no leaks here.

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    Senior Member SBS933's Avatar
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    Quote Originally Posted by EVILFORCE View Post
    Head bolts. I use a liquid Teflon. I never use red rtv. It does not stick like a good black regular sealer. Black is beautiful baby.
    Picked up the Black and am going to use the permatex thread sealer. Thanks for all the advice, I appreciate it.

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    SDBA #819 vdrivegrimes's Avatar
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    Ford diesel silicon, its grey and comes in a caulk tube.

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    Senior Member Ol Man's Avatar
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    Senior Member EVILFORCE's Avatar
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    Quote Originally Posted by ka0tyk View Post
    i use regular ol black silicone on mine, but before setting the intake manifold in i put a bead across the front and back and then let it skin up for a good 15-30 mins. otherwise all youre doing is setting it down and squishing it all out. no leaks here.

    A lot of people do this. When I was working for Cadillac engineering we tried that. Found it did not work. Found that cleaning your parts then applying sealer and assemble parts was the best. If you let it skin over it does not stick to the part as well as when fresh and wet. That is the short version.
    No Fool Like A Old Fool is there?

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    Senior Member earlbrown's Avatar
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    When I do the "skin method" I put silicon on both parts to be mated, let them skin, then assemble.

    Personal experience has shown that works best on my turbo exhaust manifolds and turbo-to-header connections.

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