RRRRRRrrRRrr - 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 01-26-2004, 09:12 PM
Burnin ruber...raising hell!
 
Last photo:
Join Date: May 2002
Location: olympia, wa
Age: 27
Posts: 125
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
RRRRRRrrRRrr

I was gunna install the headers on my pontiac 350 today... I was in my autoshop class and was goin all out doin everything that i had to do before i put the headers on ( pulled starter, sendin unit assembly, motor mounts out, manifolds off, old exhaust off.) and When i went to put the headers on i realized that on my heads i only had 4 bolts holding on the old manifolds. on the headers there were 6 bolts per side. So i realized that it wasnt going to seal so i called up hooker and they told me i was going to have to pull the motor and tap some new threads....all for some headers. They werent very friendly on the phone either so i think im gunna send them back for a refund.....
has anyone ran into this problem before.
-charlie

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-26-2004, 09:15 PM
badknuckles's Avatar
you talkin to me?
 
Join Date: Nov 2003
Location: fort lewis, wa
Age: 33
Posts: 1,090
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
that sounds like bs i wouldnt pull my motor just to put on a set of headers
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-26-2004, 09:15 PM
Jmark's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Sep 2003
Location: phoenix
Age: 61
Posts: 4,786
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 3 Posts
Which holes are missing? Something doesn't sound right here.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-26-2004, 10:02 PM
Pony's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: Lynnwood, Wa.
Age: 67
Posts: 721
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Unfortunately your a victim of the dreaded Foot Notes! Hooker footnote # 126 reads" Some factory heads do not have bolt hole in end. Holes must be drilled and tapped to assure proper seal." The hooker header section in my PAW book has 236 foot notes covering their applications. ( I've been burned by the foot notes before) As long as you haven't damaged the headers, you should be able to return them. BUT If the ad listed the above limitation or suggested you call for application information, you could be stuck with them. Most places don't play hardball but some do. Goo Luck
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-26-2004, 10:09 PM
lluciano77's Avatar
Short changed on common sense
 
Last photo:
Join Date: Jun 2003
Location: california
Age: 37
Posts: 3,548
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Stay with stock exhausts. Pontiacs don't gain much from headers. Pontiac's factory exhausts are pretty efficient. Headers on a Pontiac are notorious for leaking also.

On top of that you will notice that Percy's doesn't make a header gasket for Pontiac. Percy's are the ones I use on my cars. They are the only ones I ahve found that don't leak.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-26-2004, 10:17 PM
BstMech's Avatar
NYOFP4RJ3CHRIS
 
Join Date: Sep 2002
Location: TN. In the corporate states of America
Age: 41
Posts: 1,552
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I've always had good luck with using the factory style exhaust gaskets on my Chevys.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-26-2004, 11:31 PM
lust4speed's Avatar
Member
 
Last photo:
Join Date: Oct 2003
Location: Inland Empire, SOCAL
Posts: 424
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Your first problem is a little more basic. The heads that do not have the end exhaust bolt holes drilled are very low performance heads to begin with. They have pressed in rocker studs and small exhaust valves. You can do extensive work on even the low performance Pontiac heads and get them performing fairly well. Headers on these stock heads won't give you much at all. Headers on a good set of Pontiac heads will pay big dividends the same as any high performance engine. Historically, I have had absolutely no problem with header gaskets on my Pontiac's - the current gaskets have been on without leaking for 6 years on one and 4 years on another. As with any engine, use the best quality gaskets and a very thin layer of silicon sealer on both sides of the gasket to provide a little extra insurance. By the way, there is a flange available that secures the header at the missing bolt hole so you don't have to drill and tap the head.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-27-2004, 01:06 PM
adryan16's Avatar
Engine Builder Mentee
 
Join Date: Sep 2002
Location: Creston, Iowa
Age: 30
Posts: 215
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I was pretty gung-ho on putting a set of headers on my Pontiac 350 as well, but fortunately caught the footnotes.
Quote:
Stay with stock exhausts. Pontiacs don't gain much from headers. Pontiac's factory exhausts are pretty efficient. Headers on a Pontiac are notorious for leaking also.
I also heard this from a friend of mine that used to be big into Pontiacs, and so I decided to keep my factory manifolds, and just run dual 2 1/2 w-pipe exhaust.
Quote:
The heads that do not have the end exhaust bolt holes drilled are very low performance heads to begin with. They have pressed in rocker studs and small exhaust valves.
I thought this was true, but after changing my cast 46 heads to the cast 16 HO 400/428 heads with 2.11/1.77 valves, they didn't have the end bolt holes either. Because pontiac exhaust ports exit at about a 45* angle to the ground, headers will still have bends that impede exhaust flow. One suggestion that I have is to have them resurfaced to ensure a better chance of sealing. Another is that I of all the paints that I've used on them, the only one that has stood up longer than any of the commercial "hi-temp" paints was a can of John Deere Muffler Black I bought from our local John Deere dealer. I had the manifolds cleaned and beadblasted and then I painted two coats of the Muffler Black, and it has yet to start cracking or rusting! I highly recommend it, as a neighbor of mine that truck-pulls said that that's the same stuff he uses on the headers of his truck, and he's only repainted them once in 5 years! Hope this helps.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-27-2004, 08:09 PM
Burnin ruber...raising hell!
 
Last photo:
Join Date: May 2002
Location: olympia, wa
Age: 27
Posts: 125
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Yeah all the info helps alot.. since i am building that 400 in a month or two i think im just gunna send the headers back and use the money for other things in my rebuild. I know that the headers are interchangeable but 8i think i need the money more for other things. Also the stock exhaust manifolds got damaged while i took them off and i was wondering if the exhaust maniflods with the end bolt holes would seal on my car without the end bolt holes? I would apreciate your help.

-charlie
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-28-2004, 09:16 PM
Member
 
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 64
Posts: 5,103
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Iron ones would tend to seal better due to less flex, but it's not guaranteed. I have a '72 Ventura with 350 & the same missing bolt holes, & it leaks at the front of the passenger-side manifold. I heard the longer they leak, the more the surface erodes, necessitating milling the head at the exhaust ports. Some heads don't even have a boss to drill for a bolt hole. If yours don't, I'd get some different heads. 6X-4's are not too hard to find (350's from '77 to '79, & every one I've seen has all the holes. Used on a 400, they'll boost compression, too (stock 400's used the 6X-8, which had a larger combustion chamber). Here's how to tell them apart:

http://www.pontiacstreetperformance..../6XheadID.html
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 01:16 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.