Head bolt grade on 258 ? - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 03-08-2004, 12:46 PM Thread Starter
 
Join Date: Aug 2002
Posts: 353
Thanks: 0
Thanked 0 Times in 0 Posts
 
Head bolt grade on 258 ?

What is the grade of head bolts on 258? I canít see any markings on the bolt head, and have no luck in finding info on the web.
RedCJ7 is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 03-08-2004, 01:33 PM
 
Join Date: Sep 2003
Posts: 275
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Head bolt grade on 258 ?

There should be some tic marks on the bolt. If you have a manual for you jeep take a look in the front section maybe under general maintenance or torque specs. Here are a few links that somewhat give you an idea what i'm talking about

http://members.aol.com/pullingtractor/torque.htm

http://www.engineersedge.com/hex_bol...tification.htm
gjk392 is offline  
post #3 of (permalink) Old 03-08-2004, 03:24 PM
 
Join Date: Nov 2000
Posts: 2,687
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Head bolt grade on 258 ?

They are torqued to a higher value than grade 8 in the charts I referred to, and thus lead me to believe they are stronger than grade 8. Perhaps my reasoning is wrong in thus concluding they are stronger than grade 8???? As well, the shank and shoulder of the head of the bolts are machined differently than typical bolts. Unless you buy new head bolts from Chrysler or another source, I would use a stud kit designed for cylinder heads to replace them. I would be hesitant to use ordinary grade 8 bolts.
TiminMb is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 03-08-2004, 05:08 PM
Can't Get Enough
 
Tippy's Avatar
 
Join Date: Feb 2001
Location: Alliance, Ne
Posts: 1,423
Thanks: 1
Thanked 0 Times in 0 Posts
 
Re: Head bolt grade on 258 ?

I wouldn't use regular bolts either. Some head bolts are designed to strech, that is why they have a specific torque rating that is differnt that a simmilar sized bolt. As Tim mentioned, they are also machined differently at the neck.
Tippy is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not 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

 
For the best viewing experience please update your browser to Google Chrome