Recommend Intake Manifold Gasket - 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> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-19-2012, 04:46 AM
Registered User
 
Last photo:
Join Date: Apr 2011
Location: New Jersey
Posts: 99
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Recommend Intake Manifold Gasket

I have a 327 with 205 cc aluminum heads bolted to an LT1/Z28 intake manifold which has been ported. I'm not sure of the port sizes. The head ports are slightly larger than the manifold ports. Fel Pro 1205 are OK once I trim them to size. 1206's require less trimming, but are too large and leave about 1/16 sealing surfaces around much of the intake manifold ports. I'd go back with the 1205's, but noticed that they had crept in the areas of both water crossover ports. I had installed them with RTV on both sides of the gaskets on the water ports. I'm looking for a better, stiffer gasket that won't walk around as much as the FelPro 1205's. Thanks.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-19-2012, 06:37 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by 1965tripleblack
I have a 327 with 205 cc aluminum heads bolted to an LT1/Z28 intake manifold which has been ported. I'm not sure of the port sizes. The head ports are slightly larger than the manifold ports. Fel Pro 1205 are OK once I trim them to size. 1206's require less trimming, but are too large and leave about 1/16 sealing surfaces around much of the intake manifold ports. I'd go back with the 1205's, but noticed that they had crept in the areas of both water crossover ports. I had installed them with RTV on both sides of the gaskets on the water ports. I'm looking for a better, stiffer gasket that won't walk around as much as the FelPro 1205's. Thanks.
Generally speaking, using RTV acts as a lubricant until it's set up; using it alone can let the gaskets slip out of position when tightened. Instead use weatherstripping cement or Gasgacinch to hold the gaskets in place on one side, nothing on the other side.

A light application of RTV (following the directions for skim time) around the water crossovers can be used in conjunction with the cement.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-19-2012, 09:10 AM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 8,951
Wiki Edits: 0

Thanks: 17
Thanked 315 Times in 295 Posts
Since you're not happy with any gasket you can get material to cut your own- some companies will also cut one for you to your specs. Cobalts method for gaskets will work, if you have patience I coat one side with rtv, place the gasket, smooth it out and use little claps to hold it (if bolts aren't adequate). You then wait for it to cure before placing the otherside (over night). I've never had problems with this method but it takes time.

My pop uses contact cement, which cures really fast and holds rock hard, but god help you if you need to remove it. He gets some industrial stuff from Grainger and it gets hard as nails.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-19-2012, 03:27 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
4
Quote:
Originally Posted by ap72
Cobalts method for gaskets will work, if you have patience
Actually that's what Edelbrock recommends as well. Of course they want you to but their Edelbrock branded weatherstrip cement. I've uses 3-M cement for as long as I can remember. Black or yellow, doesn't matter.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-19-2012, 09:11 PM
How fast is fast enough?
 
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 29
Posts: 8,951
Wiki Edits: 0

Thanks: 17
Thanked 315 Times in 295 Posts
Quote:
Originally Posted by cobalt327
4Actually that's what Edelbrock recommends as well. Of course they want you to but their Edelbrock branded weatherstrip cement. I've uses 3-M cement for as long as I can remember. Black or yellow, doesn't matter.
How long is cure time? The rtv I use is hours, the contact cement my dad uses is a couple minutes, we've used that cement for everything from gaskets to headliners and seat covers but that **** gets rock hard and one you touch the two coated pieces together you cannot adjust them so you better make sure your alingment is perfect, rtv is more forgiving but takes much longer to cure.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-20-2012, 01:39 PM
MRTS33's Avatar
33 Pontiac 3W Sport Coupe
 
Join Date: Aug 2010
Location: Albany, NY
Posts: 117
Wiki Edits: 0

Thanks: 1
Thanked 1 Time in 1 Post
I do a bit of boating. Evanrude makes a gasket cement/softner that is the really good. Comes in a small can with a brush and is brown. The old guy at the marina would use an old catalog. Open it up lay the gasket on it and paint both sides. Place the gasket put the intake on just snugged up not torqued to spec yet let set for like 1/2 an hour then tourque. Good to go. Always stayed soft to.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-20-2012, 06:39 PM
Registered User
 
Join Date: Nov 2011
Location: Virginia
Posts: 705
Wiki Edits: 0

Thanks: 0
Thanked 75 Times in 75 Posts
Agreed, RTV is the culprit, not the solution.

We use Permatex "Aviation". It's a brown alcohol-based "goo" that dries once exposed to air. It comes in a little bottle with a brush. It's FAA approved for internal combustion engines, so it can't be "bad". The "Gaskacinch" is a similar sealant. "Indian Head" and Permatex "300" are two more that are similar and work in the same manner.

We use the same method as cobalt327. "Paint" one side around the water ports (head side) and leave the manifold side clean and dry.

For a mass-produced component, it's pretty hard to argue with Felpro Performance's line of gaskets. Their intake sets are as good as any out there anywhere near the price (IMO).

Jim
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-20-2012, 09:09 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by ap72
How long is cure time? The rtv I use is hours, the contact cement my dad uses is a couple minutes, we've used that cement for everything from gaskets to headliners and seat covers but that **** gets rock hard and one you touch the two coated pieces together you cannot adjust them so you better make sure your alingment is perfect, rtv is more forgiving but takes much longer to cure.
It's able to hold a gasket in position almost immediately if applied by the directions. I wouldn't call it "rock hard". You can see the info sheet for a description. The type I use comes in a bigger tube, basically the same thing I believe.

A couple cut off bolts or studs can be used to position the gasket perfectly, remove before installing the intake.
Reply With Quote Quick reply to this message

Recent Hotrodding Basics 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: 1 (0 members and 1 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
Intake manifold gasket LordTTK Engine 2 03-28-2011 05:38 PM
intake manifold gasket? hemi joe Engine 4 04-23-2010 04:14 PM
which intake manifold gasket? leastbay Engine 22 11-09-2006 04:36 PM
Which Intake Manifold Gasket? oregon chevelle Engine 10 04-18-2006 12:11 AM
351w intake manifold gasket 72Bronco351 Engine 3 11-25-2003 03:18 PM


All times are GMT -6. The time now is 11:37 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.