Exhaust bolt sheared by mechanic - Page 2 - JeepForum.com
LinkBack Thread Tools
post #16 of 22 Old 07-13-2014, 01:05 PM
Registered User
1993 ZJ 
Join Date: Aug 2010
Location: Austin
Posts: 2,480
Ouch. Those end studs see a good bit of force from the differential heating of the very long steel header flange. I broke that rear one tightening it the first time I had the header off. I was able to drill into it with a short drill bit on a 90 degree drill head and pull it out with a straight fluted screw extractor. I replaced both studs after that.

zjosh93 is offline  
Sponsored Links
post #17 of 22 Old 07-15-2014, 10:14 AM
Registered User
1992 YJ Wrangler 
Join Date: Jul 2014
Location: Mo-Ray-Al
Posts: 113
Originally Posted by Technohead View Post
Talk is cheap. Prove it. No pictures. No happen
Sure thing ... I'll run right out and find a ZJ so I can bust a manifold bolt off it because I feel such a great need to prove myself. Or maybe not. How about I just use google?


Or if that's too much reading ...


Proof enough?
Professur is offline  
post #18 of 22 Old 07-16-2014, 03:16 PM Thread Starter
Registered User
1995 ZJ 
Join Date: Aug 2013
Location: Pittsburgh
Posts: 6
Huh. Way cool. Cronaweld 333. Well, that was way beyond the capacity of these guys. Horizontal busted bolt too, not vertical. Thanks for the links....I'll remember this going forward.
pwoodbury1 is offline  
post #19 of 22 Old 07-16-2014, 05:07 PM
Registered User
Join Date: Dec 2004
Posts: 3,134
My gosh!!! Almost $1000?!?! They broke the bolt?!

What did they do to get it out??

1994 ZJ-I6 w/216,000 mi
1998 ZJ 5.9 w/65,155 mi Slate Black
2004 KJ w/90,300 mi
jeepjeepster is offline  
post #20 of 22 Old 07-16-2014, 06:21 PM
Registered User
1992 YJ Wrangler 
Join Date: Jul 2014
Location: Mo-Ray-Al
Posts: 113
It can be done with common rods too. The 333 is just a particularly specialized rod for the technique. I run a brushful of anti-splatter gel into any threads exposed to serve the same purpose as the 333's fancy flux. Horizontal makes no difference with a quick freezing rod. The whole thing works because as the heat sinks down the restant it makes it expand. It wants to expand in all directions, but it can't because it's width is constrained by the walls, making all expansion go lengthwise. Then it cools and shrinks ... but it shrinks in all directions ... leaving a piece that's now slightly longer, and slightly skinnier than before. The added materiel and welded on nut are little more than a handle at this point. Run a thread chaser or tap down the hole to clean up any distortions and you're back in business. A practiced hand at it can clear the hole in under 10 minutes.

I will say, I've never attempted this on an aluminium head.
Professur is offline  
post #21 of 22 Old 07-16-2014, 06:50 PM
Registered User
1994 ZJ 
Join Date: Jan 2011
Location: Lansing
Posts: 387
personally, think pepboy's should have paid to have it extracted or bought you a new head.
ozzy_2_me is offline  
post #22 of 22 Old 07-16-2014, 06:58 PM
Registered User
2000 TJ Wrangler 
Join Date: Jul 2012
Location: Ashford
Posts: 99
Originally Posted by ozzy_2_me View Post
personally, think pepboy's should have paid to have it extracted or bought you a new head.

Aerospace CNC tube bending.
KoolAidMan888 is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


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
Show Printable Version Show Printable Version
Email this Page Email this Page

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 Off
Pingbacks are On
Refbacks are On

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