Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical chat

Reply
 
LinkBack Thread Tools Display Modes
Old 09-11-2013, 08:33 AM   #1
pjq
Registered User
 
Join Date: Dec 2010
Location: Eastern canada
Posts: 262
Siezed exhaust flange studs

04 S 6 spd
Exhaust flange. Any suggestions how to get these stud bolts outs?Are they a tapered fit, a key way or just rusted in? Thats penetrating oil on the studs now.
I broke them when I twisted them off back in February to remove the engine.

pjq is offline   Reply With Quote
Old 09-11-2013, 09:02 AM   #2
Registered User
 
BYprodriver's Avatar
 
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,166
Garage
They should hammer out easily.
BYprodriver is offline   Reply With Quote
Old 09-11-2013, 09:54 AM   #3
pjq
Registered User
 
Join Date: Dec 2010
Location: Eastern canada
Posts: 262
Bypro, thats what I was hoping but is not the case.
The thin head of the bolt is round not hex, could it be a bolt with splines on it?I don't see any spot weld on it, it is factory original.
One of the three flange nuts is spot welded to the flange.
pjq is offline   Reply With Quote
Old 09-11-2013, 12:12 PM   #4
Registered User
 
BYprodriver's Avatar
 
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,166
Garage
Yes it is splined with a interference fit. Maybe you can support the flange around the bolt with a pipe or socket enough to use a BFH.
BYprodriver is offline   Reply With Quote
Old 09-11-2013, 12:28 PM   #5
Registered User
 
Trey T's Avatar
 
Join Date: Dec 2009
Location: Texas
Posts: 244
I used grinder and drill out
Trey T is offline   Reply With Quote
Old 09-11-2013, 01:01 PM   #6
pjq
Registered User
 
Join Date: Dec 2010
Location: Eastern canada
Posts: 262
thanks Bypro, the pic shows what i've tried so far. With this 3 " clamp and penetrating oil and stricking the edge of the flange with a hammer still no luck. Its been under pressure for 1.5 hrs now. After your post, I like the BFH but can't support the muffler, I removed the little 3" clamp and now have a 8" clamp and tightened with a pipe. Still no movement.

What about grinding the head off and drilling out the stud?

If I need Oxy Acetylene I'll have to wait until tomorrow and take the whole muffler assembly to a welding shop.

pjq is offline   Reply With Quote
Old 09-11-2013, 01:03 PM   #7
pjq
Registered User
 
Join Date: Dec 2010
Location: Eastern canada
Posts: 262
Thanks Trey T that will be my project for this evening.
pjq is offline   Reply With Quote
Old 09-11-2013, 02:26 PM   #8
Registered User
 
Trey T's Avatar
 
Join Date: Dec 2009
Location: Texas
Posts: 244
upgrade it to spring bolt/nut type that Honda uses for their exhaust systems. You can find it locally
Trey T is offline   Reply With Quote
Old 09-11-2013, 04:05 PM   #9
Registered User
 
Join Date: Oct 2009
Location: atlanta
Posts: 57
Heat the surrounding area around the stud cherry hot and hammer it out. It is the easiest way. I have done dozens of them this way.
__________________
Blake Meredith

Flat 6 Innovations Engine Shop Foreman
bam914 is offline   Reply With Quote
Old 09-11-2013, 05:44 PM   #10
pjq
Registered User
 
Join Date: Dec 2010
Location: Eastern canada
Posts: 262
Yes Bypro it was splined and the spline is the full depth of the flange. I cut them off and drilled them out, I wish I had oxy acteylene.
Trey T I'll check with Honda tomorrow.

Here is the head of the bolt and a portion of the splined area of the bolt.

pjq is offline   Reply With Quote
Old 09-11-2013, 07:09 PM   #11
Registered User
 
Trey T's Avatar
 
Join Date: Dec 2009
Location: Texas
Posts: 244
you don't have to get it from the stealership Honda, get it from autopart store like autozone

Last edited by Trey T; 09-11-2013 at 07:22 PM.
Trey T is offline   Reply With Quote
Old 09-13-2013, 04:54 AM   #12
pjq
Registered User
 
Join Date: Dec 2010
Location: Eastern canada
Posts: 262
I used 8x30x1.25 bolt (8 hardness) with copper nuts, and copper never-seize. At the auto parts stores and honda and vw I could not find an exhaust bolt of this size. They did have studs but no bolts. After talking to one of the muffler shops they said a #5 or #8 bolt is good, DON'T use a stainless bolt.
pjq is offline   Reply With Quote
Reply


Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 05:06 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page