To Torque to Re-Torque. That is the question - 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 06-28-2010, 09:49 PM
Duntov's Avatar
Visit the NASCAR Hall of Fame
 
Join Date: Jun 2010
Location: Near Charlotte
Posts: 411
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
To Torque to Re-Torque. That is the question

I want to turn this into a survey but lost the information on how to do it.


Question is...And we're talking GenI SBC for purposes of control; don't want to muddy the waters with confusion.

Do you torque down your heads and call it a day? What's your favorite color?

Do you re-torque your heads after heat cycle at least once? What's your favorite color?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-28-2010, 11:03 PM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 46
Posts: 4,822
Wiki Edits: 0

Thanks: 0
Thanked 64 Times in 52 Posts
I always re-torque, I don't care what the box says, usually after three or more heat cycles. The new gaskets don't lose the torque like they did in the old days but it seems they still lose a small amount like 5ft/pds so I still do it.
__________________
Outlawed tunes from outlawed pipes
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-28-2010, 11:27 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
SBC, ford, mopar, yes. AMC no! Reason, 110-115 ft lbs of torque on AMC heads.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-28-2010, 11:43 PM
Silverback's Avatar
Boost Retard
 
Last photo:
Join Date: Mar 2007
Location: DC Metro
Posts: 369
Wiki Edits: 0

Thanks: 1
Thanked 2 Times in 2 Posts
blue and blue...
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-29-2010, 07:36 AM
Duntov's Avatar
Visit the NASCAR Hall of Fame
 
Join Date: Jun 2010
Location: Near Charlotte
Posts: 411
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Started the retorque poll but need tech help

I finally realized how to create a poll on this re-torque issue. The link is below may or may not carry you there. could someone fix this for me? Thanks Duntov


Re-Torque Poll

Last edited by Duntov; 06-29-2010 at 07:58 AM. Reason: link correction
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-29-2010, 07:37 AM
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
colors

Yeah, I forgot. BLACK AND BLUE. Thats what I was after torquing those AMC heads with an old style pointer torque wrench.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 07-13-2010, 07:50 AM
farna's Avatar
Member
 
Last wiki edit: AMC V-8s Last photo:
Join Date: Sep 2002
Location: Batesburg-Leesville, SC
Age: 52
Posts: 1,624
Wiki Edits: 14

Thanks: 0
Thanked 13 Times in 13 Posts
Modern engines? Torque and forget. Most of the latest engines use torque-to-yield bolts that can only be used once anyway. Don't like those!! Like most things, they are easier/quicker for the manufacturer to install (can use automated equipment), that's the main reason for them.

The only engine I know of that REQUIRES retorquing even with modern head gaskets is the old AMC/Rambler 196. DO NOT confuse this with the 64+ 199/232/258/4.0L -- they have no problems!

We (us AMC/Rambler guys) also figured out WHY it eventually loosens the head bolts! The head is rather massive for a small six and expands and contracts by 0.020" every heat cycle. That eventually backs the bolts out enough to blow the gasket -- running hot is the first indication, and the head usually warps a little. Now they are old (last one made in 65!) and have been run hot a few times already, so they have a nasty tendency to crack now, and good heads are getting hard to find.

This engine is a flat-head conversion. The head can't be bolted to the old flat-head block because AMC changed the right side of the block casting where the valves were in the flat-head. From the top of the side covers down and on the left side of the block it's identical to the flat-head, but that top right side is different and the bolt pattern for the head is different. The head has the intake built in with an aluminum cover plate. The large mass of cast iron alone is what causes it to loosen the bolts over time. Has to be retorqued every other year/12-15K miles or it will eventually blow the head gasket. Don't know how long/far it will go, but the valve cover has to come off to adjust the solid valves at about those intervals anyway.
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
Torque Converter Question newbielike Transmission - Rearend 2 12-17-2007 05:53 PM
Torque Converter Question leejoy Transmission - Rearend 5 10-02-2006 11:57 AM
Torque converter question. gavinpierce Hotrodding Basics 1 02-15-2006 09:53 AM
Hotrodders Guidelines -- READ ME Jon Suspension - Brakes - Steering 0 06-14-2003 05:03 PM
Hotrodders Guidelines -- READ ME Jon Electrical 0 06-14-2003 05:01 PM


All times are GMT -6. The time now is 12:02 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.