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07-08-2010, 10:17 AM
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#1 |
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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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07-08-2010, 11:27 AM
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#2 |
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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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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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07-08-2010, 11:37 AM
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#3 |
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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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Beat it to fit, Paint it to match... 
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07-08-2010, 12:09 PM
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#4 |
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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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07-08-2010, 12:18 PM
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#5 |
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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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Beat it to fit, Paint it to match...
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07-08-2010, 12:36 PM
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#6 |
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Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,179
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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 69 C30 Former Motor Home, Flat Bed time 70 G20 Red-E-Kamp Conversion "I'm your Boogy Van" |
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07-08-2010, 09:19 PM
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#7 |
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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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1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles  18.5" x 31" Hoosier Pro Street Radials  ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree 
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07-08-2010, 09:22 PM
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#8 |
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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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Beat it to fit, Paint it to match...
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07-08-2010, 09:47 PM
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#9 |
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"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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God Said,"Building A 10 Second Import Is Like Coming Out Of The Closet, In The End Ur Still....."EXPLETIVE" 
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