Head gasket help - 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 06-26-2012, 06:57 PM
Registered User
 
Last photo:
Join Date: May 2012
Posts: 289
Wiki Edits: 0

Thanks: 5
Thanked 5 Times in 5 Posts
Head gasket help

Hey Guys

I am getting a set of AFR 180's for my SBC 355. My issue is my pistons sit .025 down in the whole. If I use the gasket AFR recomends(felpro 1003) Ill end up with a quech of .066

I asked AFR about using .015 rubber coated steel shim (Felpro 1094) The said that gasket hangs out in the combustion chamber a little.

I know the best thing to do would be to zero deck the block but it is already assembled and I dont want to have to do that if I can avoid it.

Anybody using the felpro 1094 on an AFR head or have any suggestions??

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-26-2012, 08:57 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: Hopewell, Va
Age: 62
Posts: 1,194
Wiki Edits: 0

Thanks: 0
Thanked 117 Times in 113 Posts
head gasket help

The Fel-Pro 1094 is a steel shim gasket with a rubber coating. It is recommended that heads and block be very flat. Some even go as far and use studs for fastening the heads. I ran into the same problem with my big block. I thought about using steel shim gasket also. I decided to have the block decked to .005 and used the .036 Cometic head gaskets. They have a good rep and are re-usable. I have too much money tied up to take a chance on something like blowing head gaskets.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-26-2012, 09:21 PM
Registered User
 
Last photo:
Join Date: May 2012
Posts: 289
Wiki Edits: 0

Thanks: 5
Thanked 5 Times in 5 Posts
Head surface should be good as they are new. The block im not sure. It is a fresh rebuild that I bought from a freind of a freind. It looks like the deck was surfaced so it should be flat.

I see there is mixed reviews when I read online. some say they run a steel shim with an AFR head with no issue and some say not to do it.

I really dont want to break it down and have it decked if I can avoid it. I went out tonight and measured again (was in a hurry the first time) the pistons are more like .020 in the hole.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-26-2012, 11:17 PM
S10 Racer's Avatar
http://www.warsprints.com
 

Last journal entry: W.A.R. (Wingless Auto Racing) Sprint Car Racing
Last photo:
Join Date: Nov 2007
Location: At The Dirt Tracks
Age: 55
Posts: 1,881
Wiki Edits: 0

Thanks: 3
Thanked 59 Times in 54 Posts
I know this is'nt the most cost effective way but you could buy a set of Felpro gaskets and fit them to the head to see if they will "hang out" in the combustion chamber. You might also look at Flatout gaskets for your application.
https://www.flatoutgroup.com/default.aspx
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-27-2012, 01:39 AM
malc's Avatar
Living At The Speed Of Life
 
Last photo:
Join Date: Jun 2003
Location: Espaņa Right Coast
Posts: 3,260
Wiki Edits: 0

Thanks: 90
Thanked 93 Times in 79 Posts
My pistons are 20 down the bore, 64cc heads, and I use Clevite Nitroseal Cylinder Head Gaskets


Bore (in) 4.125 in.
Bore (mm) 104.775mm
Gasket Material Nitroseal
Compressed Thickness (in) 0.026 in.
Compressed Volume (cc) 5.400cc
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-27-2012, 04:02 PM
6426yy's Avatar
Member
 
Last photo:
Join Date: Nov 2003
Location: Macomb Il.
Age: 35
Posts: 545
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
http://www.summitracing.com/parts/NAL-14096405/

.028 GMPP gaskets
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-27-2012, 05:09 PM
Registered User
 
Last photo:
Join Date: May 2012
Posts: 289
Wiki Edits: 0

Thanks: 5
Thanked 5 Times in 5 Posts
Thanks for the info guys!! much appreciated. What kind of heads are you using those gaskets on?? Think they will be ok with AFR??
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-27-2012, 06:51 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: Hopewell, Va
Age: 62
Posts: 1,194
Wiki Edits: 0

Thanks: 0
Thanked 117 Times in 113 Posts
GM head gaskets

Those head gaskets will not work for you. Your bore is 4.060. You can call Cometic and custom order your head gaskets. You would need .027 compressed thickness and 4.060-4.100 bore.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 06-27-2012, 07:17 PM
Registered User
 
Last photo:
Join Date: May 2012
Posts: 289
Wiki Edits: 0

Thanks: 5
Thanked 5 Times in 5 Posts
I said 355 but maybe I have that wrong because my bore is 4.030

isnt a 30 over 350 a 355??
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 06-27-2012, 10:46 PM
Registered User
 
Last photo:
Join Date: May 2012
Posts: 289
Wiki Edits: 0

Thanks: 5
Thanked 5 Times in 5 Posts
AFR recomend this one but it is to thick
http://www.summitracing.com/parts/FEL-1003/

What do you guys think of this one?? it would get me into the correct quench area and it is the same bore size as the one AFR recomends but it is copper.
http://www.summitracing.com/parts/SCE-011152/?rtype=10
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 06-29-2012, 12:42 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: Hopewell, Va
Age: 62
Posts: 1,194
Wiki Edits: 0

Thanks: 0
Thanked 117 Times in 113 Posts
SCE Gaskets

The block has to be cut for O-rings when using those gaskets. That is alot of work and expense. BTW it doesn't matter about 4.030 or 4.060 the GM gaskets are for a stock bore (4.000) block.

Last edited by cdminter59; 06-29-2012 at 12:48 PM.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 06-29-2012, 01:06 PM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: Hopewell, Va
Age: 62
Posts: 1,194
Wiki Edits: 0

Thanks: 0
Thanked 117 Times in 113 Posts
Head gasket help

Check these gaskets out at: Cometic Gaskets C5245-027 Cometic Chevrolet Head Gaskets or you can use any brand that you can find .027 compressed thickness and with a bore of 4.030-4.100 in MLS gaskets. The closer to your bore the better.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 06-29-2012, 03:37 PM
6426yy's Avatar
Member
 
Last photo:
Join Date: Nov 2003
Location: Macomb Il.
Age: 35
Posts: 545
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
The GM .028 gaskets will work fine I installed a set on a 355 last fall. The bore size is 4.100"
GM Performance Parts 14096405 - 0.028" Composition w/ Graphite - Small Block Chevy Head Gasket | SDParts - 1-800-456-0211
Or the set that malc recommended should also work.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 06-29-2012, 03:54 PM
BigChevyFTW
Guest
 
you can use felpro Q 1094 because of the rubber that coats them i used them with my AFR heads and was told they wont work but they do work and its the same bore as your 355 so i can tell you from experience they will work.

its a .015 quench thickness gasket so its the best way to go
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 06-30-2012, 10:31 AM
Registered User
 
Last photo:
Join Date: Jan 2011
Location: Hopewell, Va
Age: 62
Posts: 1,194
Wiki Edits: 0

Thanks: 0
Thanked 117 Times in 113 Posts
GM performance head gaskets

The information that Summit Racing has on those head gaskets differ from SDParts. Check out Summits website: GM Performance 14096405 - GM Performance Engine Gaskets & Seals - Overview - SummitRacing.com
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: 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
Head gasket thickness, Gasket or Shim? rollie715 Engine 6 04-25-2012 03:15 PM
Unable to separate head from block due to head gasket sealer Nostalgia Hotrodding Basics 18 02-02-2011 01:12 PM
cracked head or head gasket???? onebadmerc Engine 12 12-04-2008 12:10 PM
Mr Gasket Ultraseal Head Gasket's 406 ss monte Engine 4 05-03-2008 08:19 PM
oil on head bolts and head gasket bullheimer Engine 7 05-25-2004 04:50 PM


All times are GMT -6. The time now is 12:04 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.