im so confused - 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 02-22-2006, 09:56 PM
Registered User
 
Join Date: Feb 2006
Location: Las Vegas
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
im so confused

i m new to this whol thing and i really need to know how to find the torque sequence for the heads on a big block chevy. can anybody help me.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 02-23-2006, 09:07 PM
73oldsman's Avatar
Member
 
Last photo:
Join Date: Jun 2004
Location: Northwest Florida
Posts: 1,116
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
http://www.hotrodsforsale.com/hrfs/t..._big_block.htm Couldn't find a diagram for you but as I recall you can tighten up all bolts to about 40 or 45 ft.lbs. then go around proper torque sequence (center outwards) then re-torque at 60ft.lbs., then do it again at 80 ft.lbs. A torque wrench that you can set the torque and it clicks when you get to the setting works best if you have one!
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-23-2006, 11:43 PM
68NovaSS's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Working with chromed bolts
Last journal entry: New to me T-Bucket
Last photo:
Join Date: Sep 2002
Location: Nine Mile Falls, Washington
Posts: 5,214
Wiki Edits: 9

Thanks: 98
Thanked 130 Times in 121 Posts
Here's a rough diagram, for a 1970 454.

http://www.autozone.com/servlet/UiBr...ction=loadPage
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-24-2006, 08:25 AM
farna's Avatar
Member
 
Last wiki edit: AMC V-8s Last photo:
Join Date: Sep 2002
Location: Batesburg-Leesville, SC
Age: 52
Posts: 1,632
Wiki Edits: 14

Thanks: 0
Thanked 15 Times in 14 Posts
For any head, you start as close to the center of the head as possible on one side then go as straight across as possible for the next bolt. Then you can go either forward or to the back for the third, usually on the same side as the last bolt tightened (#2). Work in a circular pattern -- something like this:

9 5 1 4 8

10 6 2 3 7 11

Number of bolts doesn't matter. It's like this on all engines -- fours, sixes, straight eights. You wouldn't want to start with #2 then go over to #3 in the above example though. If you started with #2, the next bolt would be #1, then #3, #5, #4, #7, #6, #8, #11, #9, and finally #10. It's best to use 2-3 increments as suggested. If the torque is 70 or less I generally use two steps -- set it in the middle for the first round, then all the way for the second round using the same sequence both times. For 80-100 I go with three steps. Start with 40, split the difference from 40 to final, the final.

Clicker wrneches are nice -- as long as they are properly calibrated. NEVER store one "loaded" -- always set to zero before storing. Otherwise the springs have tension on them for a long time and can take a "set", which throws off accuracy.

The old beam style wrenches are actually more accurate. You can bend the pointer to zero to "reset" it, or just subtract/add whatever the pointer is on from/to the desired torque. The only thing you can mess up is not watching the needle as you tighten. If you're off a couple ft/lbs it won't matter.

NEVER use your torque wrench to break bolts loose! That's hard on it, and can throw it out of calibration.

Clicker and dial type wrenches need to be calibrated every couple years or so. If you only occasionally need one, buy a cheap clicker every time you start an engine project. The cheap ones don't hold up well over time, but are generally good for a year or two before getting out enough to need recalibrating. If you paid $30-$40 for the thing, it will cost that much (or more) to get it recalibrated. So just toss the old one and get a new one! That's just fine for the hobbyist who may build an engine every 2 years or more. The wrench should last for installing brackets, new head gaskets, etc. between builds. If you build more than one engine a year, you're probably better off to get a nice torque wrench and have it calibrated per the manufacturers suggestion. Expect to pay $80+ for one though, then another $25-$50 for clibration. Of course beam types don't have to be calibrated, are pretty cheap, and last a long time if taken care of. Unless you bend a beam wrench or the scale, it should last almost indefinitely. So don't bang it around! I always thought the beam types looked cheap and a bit hokey, until I bought a couple clickers and paid to get one recalibrated...
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
Confused by the oil pressure adryan16 Engine 0 05-01-2004 12:20 PM
Ok, Now I'm confused!?! HELP?!? JHayman2677 Engine 6 04-29-2004 07:22 AM
Confused And Alarmed... KULTULZ Hotrodders Site Suggestions and Help 3 01-19-2004 01:30 PM
confused??? cranknrods Hotrodders' Lounge 7 08-11-2003 01:48 PM
confused Camaro76 Engine 9 12-11-2002 07:08 AM


All times are GMT -6. The time now is 08:15 PM.


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.