Headers for Pontiac 400 - 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 08-17-2003, 07:44 AM
midget66's Avatar
Registered User
 
Join Date: Aug 2003
Posts: 5
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Headers for Pontiac 400

I have a pontiac 400 with 7K3 heads on a 79 firebird. I would like to go ahead and put headers on while I'm installing a TH400 and new motor/trans mounts. The problem is that this head does not have outside bolt holes for the headers. I have read articles that suggested drilling and tapping new bolt holes and some that said a good gasket material and hi-temp sealant work great. Has anyone run across this problem before? There is not enought head on the front of the motor to drill and tap new holes not including the need to pull the motor. Help!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-17-2003, 08:05 AM
BOBCRMAN@aol.com's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 8,087
Wiki Edits: 0

Thanks: 24
Thanked 258 Times in 242 Posts
The only cure is to drill and tap these heads, there is enuff material there, but you have to pull the heads to do it rite, there is no miracle cure for this, less of course you enjoy leaking backfiring,headers. Thank GM's brilliant design staff for the idea, wonder how much money they saved?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-18-2003, 06:24 AM
Member
 
Join Date: Feb 2003
Location: North Carolina
Posts: 454
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
The 7K3 heads can be drilled and tapped for headers but you will also need to fabricate small spacers due to the ends of the head are offset. If this is not done the headers will not seal up properly and will leak no matter what you do. DO not try to do this with the heads on the engine, and be careful not to drill to deep as you could get into a water jacket in the head.
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



All times are GMT -6. The time now is 04:33 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.