SBC Intake manifold sealing styles..gaskets vs bead of sealant?? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 02-14-2010, 09:50 AM
Livin in ChevHelle
 
Join Date: Oct 2009
Location: Okiehoma
Age: 35
Posts: 33
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
SBC Intake manifold sealing styles..gaskets vs bead of sealant??

Hey fellers,
Just curious here, getting ready to go back together with my SBC(again) and was curious as to how you install your intake manifolds at the ends where it seals against the block(not where it seals against the heads).. Do you guys always use the little rubber gasket strip or lay a bead of hi-temp sealant?.. I have done it both ways..was JW..
Thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-14-2010, 11:19 AM
Rickracer's Avatar
ASE Master Tech, Fabricator
 
Last wiki edit: Taurus 2-speed fan control wiring diagram Last photo:
Join Date: Jan 2010
Location: Kissimmee, Florida
Age: 55
Posts: 936
Wiki Edits: 8

Thanks: 0
Thanked 3 Times in 3 Posts
Toss the rubber gaskets/sealing strips and use Loctite/Permatex "Right Stuff", once you try it, you'll never use regular RTV again,
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-14-2010, 11:28 AM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 46
Posts: 4,900
Wiki Edits: 0

Thanks: 0
Thanked 72 Times in 60 Posts
I dimple the end rails with a center punch to prevent squeeze out and use silicone sealant, the rubber eventually cracks and leaks. Just make sure you let it dry overnight before starting up. I have never had a homemade silicone end seal leak...ever.
__________________
Outlawed tunes from outlawed pipes
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-14-2010, 11:39 AM
Rickracer's Avatar
ASE Master Tech, Fabricator
 
Last wiki edit: Taurus 2-speed fan control wiring diagram Last photo:
Join Date: Jan 2010
Location: Kissimmee, Florida
Age: 55
Posts: 936
Wiki Edits: 8

Thanks: 0
Thanked 3 Times in 3 Posts
I generally scuff both surfaces with 80 grit, then clean with brakleen, either way will get you a leakproof seal,
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 02-14-2010, 11:48 AM
Registered User
 
Join Date: Dec 2009
Location: holland ohio
Age: 48
Posts: 67
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I also Do not use the rubber strips, I use Permatex RIGHT STUFF, amazing stuff!
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 02-14-2010, 12:37 PM
sqzbox's Avatar
My pipes are my music
 
Last photo:
Join Date: Sep 2009
Location: indiana
Age: 64
Posts: 2,938
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Rubber strip

Oh MAAAAAN! And I trusted Fel-Pro! Maybe a good thing I used both.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 02-14-2010, 01:59 PM
Livin in ChevHelle
 
Join Date: Oct 2009
Location: Okiehoma
Age: 35
Posts: 33
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by sqzbox
Oh MAAAAAN! And I trusted Fel-Pro! Maybe a good thing I used both.
Hehe...that was my attack plan in the past, hated it, leaked shortly after the build. Ive done the sealant method, seemed to work, but Ive never knew which method you guys preferred...

Permatex Rite Stuff huh?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 02-14-2010, 03:07 PM
sqzbox's Avatar
My pipes are my music
 
Last photo:
Join Date: Sep 2009
Location: indiana
Age: 64
Posts: 2,938
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Sealer or gasket?

I like the permatex high heat red. I ran a thin bead across the rail and set the rubber gasket on, then run a bead across the slot where the port gasket tabs set in the rubber one on the ends. Haven't had any leaks since I put it together in sept. 08.
I went out and checked just now so I wouldn't be blowing smoke and it's still dry across the bell housing.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 02-14-2010, 07:00 PM
Registered User
 
Last wiki edit: Hand cleaner Last photo:
Join Date: Jun 2008
Location: Houston
Posts: 170
Wiki Edits: 3

Thanks: 0
Thanked 2 Times in 2 Posts
i never use the valley gaskets.
i mainly use permatex ultra copper.
right now i have 10 years and over 150K on my daily driver with no signs of a intake leak.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 02-14-2010, 08:17 PM
Rickracer's Avatar
ASE Master Tech, Fabricator
 
Last wiki edit: Taurus 2-speed fan control wiring diagram Last photo:
Join Date: Jan 2010
Location: Kissimmee, Florida
Age: 55
Posts: 936
Wiki Edits: 8

Thanks: 0
Thanked 3 Times in 3 Posts
Quote:
Originally Posted by Coletrane
...Permatex Right Stuff huh?
I guarantee, if you ever try it, you'll never use regular RTV again,
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 02-14-2010, 09:49 PM
airboat's Avatar
Registered User
 
Last photo:
Join Date: Mar 2006
Location: Canada
Posts: 286
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
It's moisture in the air that kicks it so if you want it to set quicker spritz some water on it or lay a wet paper towel over it...
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 02-14-2010, 11:39 PM
sqzbox's Avatar
My pipes are my music
 
Last photo:
Join Date: Sep 2009
Location: indiana
Age: 64
Posts: 2,938
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Will this work?
Attached Images
 
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 02-15-2010, 08:07 AM
Livin in ChevHelle
 
Join Date: Oct 2009
Location: Okiehoma
Age: 35
Posts: 33
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
EeeZee now...family forum here..better change that to a Ford logo.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 02-15-2010, 09:10 AM
Mertz's Avatar
Member
 
Join Date: Jun 2002
Location: Reardan, WA
Posts: 665
Wiki Edits: 0

Thanks: 1
Thanked 3 Times in 3 Posts
I just pulled the intake off my 72 Chevy 350 because I suppected a gasket leak causing low vacuum at cruise. I used the hard blue flepro gaskets. When I pulled the intake I found oil in the runners. Leak confirmed. The good thing about the hard gaskets is they pulled right off with no scraping.

I am reinstalling a 2101 Edelbrock with Edelbrock gaskets. I lined them up with the ports on the head the best I could. When I went to lay on the intake some of the black lines were exposed on the top part of the gaskets. I also had to pull the valve covers so I could raise the valve cover gaskets so I could get the new intake gaskets high enough. Did I get the wrong gaskets? It doesn't seem like there is enought tolerance between the openings in the gasket and the ports on the intake. It is not completely installed yet so now would be a good time to change them if I have to. I really don't want another internal gasket leak. Any good way to check for leaks before everything goes back on?

Right Stuff is excellent but pricy. I have used either black or blue Hi temp RV without problems. The Edelbrock gaskets don't even come with the rubber or cork end gaskets. If you get them just toss them and use sealant.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 02-15-2010, 10:08 AM
Registered User
 
Join Date: Aug 2006
Location: Alexandria, VA
Posts: 1,747
Wiki Edits: 0

Thanks: 4
Thanked 64 Times in 62 Posts
The directions with my Edelbrock Performer EPS manifold said specifically to not use the hard Fel-Pro gaskets, since they would not seal right. They provided the Edelbrock parts #, and an equivalent Fel-Pro number that was recommended. I used that Fel-Pro gasket, and have not had any problems with the seal.

I also found that I had to pull the valve covers to allow space to get everything to line up. I used a bead of RTV to seal the ends.

I also got some small block-off plates included with the manifold gaskets, but did not use them. From what I remember, the block offs matched up with flat areas on the block, so they would not have done anything anyway.

You m
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Aluminum Intake Replacement on SBC 31fordcoupe Engine 5 12-08-2009 12:47 AM
Changed intake manifold gaskets now lifters extremely noisy strokey Engine 17 06-27-2009 01:36 PM
Torque link intake manifolds? xxllmm4 Engine 10 06-12-2009 07:20 AM
intake manifold gaskets... camarokid87 Engine 1 08-25-2002 01:20 PM
adapting early sbc intake manifold to 1987 350 heads steve curtis Engine 1 06-13-2002 02:56 AM


All times are GMT -6. The time now is 07:06 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.