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#1 |
Registered User
Join Date: Apr 2010
Location: Boise, ID
Posts: 1,280
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Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
Hey guys,
I broke off 1 intake manifold bolt yesterday so I will be pulling the whole thing today and need to know what is the best gasket/sealant combination to use for the best seal on an intake manifold for a Chevy 350? Also, what is the best sealant to use on the bolts? Is black Permutex high temp silicone good? Thx in advance for the help. |
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#2 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
like i told you in your pther post sillycone is a pisspoor thread sealant// pull your bolts you tried sealing with sillycone and you will see little to no sillycone is on the actual threaded surface
read my post for proper thread sealant
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#3 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
I've always used oil resistant RTV as a thread sealant with no problems. Maybe I'll look into getting some "proper" thread sealant, but it's worked for me so far.
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#4 |
Registered User
Join Date: Apr 2010
Location: Boise, ID
Posts: 1,280
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Re: Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
Thanks CDowns, I had noted it. Just looking for the general opinion from everyone.
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#5 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
Just double checked, Edelbrock actually recommends RTV as a thread sealant for intake bolts.
http://www.edelbrock.com/automotive_.../2000/2101.pdf
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#6 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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Re: Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
you got to love the old Room Temperature Vulcanization........How many of you knew thats what RTV stood for???? Be honest...
Smitty
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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#7 |
Active Member
Join Date: Oct 2006
Location: Ohio
Posts: 1,643
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Re: Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
ARP makes a very good teflon based thread sealer
One of the issues with RTV is it throws off the torque value if you use a torque wrench I like a product called the right stuff from permtex - this stuff is the best sealent I have ever used If you disassemble something that you have stuck on with the right stuff be prepared to use a wire brush on a drill to clean it off - the stuff is just plain tough
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#8 |
Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
Any sealant you use is going to throw off the torque compared to dry. If Edelbrock recommends RTV, that's what I'll use. Seems to work.
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#9 |
"the other guy"
Join Date: Oct 2008
Location: Olivehurst California 95961
Posts: 901
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Re: Changing 350 Intake Manifold Gasket - Best Gasket/Sealant?
i used permatex ultra Grey. soft yet solid!
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