Hello! Log in or Register   |  Help  |  Donate  |  Buy Shirts  See all banner ads | Advertise on TheSamba.com  
TheSamba.com
 
Crossover pipe
Forum Index -> Bay Window Bus Share: Facebook Twitter
Reply to topic
Print View
Quick sort: Show newest posts on top | Show oldest posts on top View previous topic :: View next topic  
Author Message
ivwshane
Samba Member


Joined: May 19, 2011
Posts: 1113
Location: Sacramento ca
ivwshane is offline 

PostPosted: Sat Oct 27, 2018 10:05 pm    Post subject: Crossover pipe Reply with quote

I've decided to refurbish my exhaust system (I've already got good CAT). My crossover pipe is in good shape except for the studs. My plan was to replace the studs with stainless steel ones. I tried removing one of the studs using various methods, double nut, penetrating oil, heat, extractor. But I had no luck. Finally I decided to drill out the stud and re tap it.

For the life of me I cannot tap it, my tap just won't bite.

Can a machine shop remove and add new studs? If I messed up and drilled a hole too big, can they fix it?
Is there a better type of metal stud for this application?

What are my options?
_________________
77 westy 2.0 FI? (who knows)
71 ghia coup 1600dp
Back to top
View user's profile Send private message Gallery Classifieds Feedback
busman78
Samba Member


Joined: August 17, 2004
Posts: 4101
Location: Oklahoma City, OK
busman78 is offline 

PostPosted: Sun Oct 28, 2018 4:30 am    Post subject: Re: Crossover pipe Reply with quote

Had you got your tap to run a few threads it would of broke off, that metal has been heat cycled hard. A carbide tap might do the job for it will cut harder metal. Being able to anneal the metal would also be helpful.

To answer your two questions they are yes, as for Stainless that is a no, not a good choice for it is weaker than the steel 8.8 or 10.9 studs.
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
SGKent Premium Member
Samba Member


Joined: October 30, 2007
Posts: 29322
Location: Nor Cal
SGKent is offline 

PostPosted: Sun Oct 28, 2018 8:42 am    Post subject: Re: Crossover pipe Reply with quote

heat the metal with a torch until the area is cherry red and then let it cool slowly. That should soften it.
_________________
Godspeed to all who undertake a journey in a VW Bus.

*You can do it right the first time, or do it over, the choice is yours. It is a free country. As to brakes, steering, tires, axles etc. - you may only get one chance at doing those right.

* VW Buses and VW cars share many of the same systems but if you haven't owned a bus and maintained it for awhile, you really don't know how different it is.

1971 (sold)
1977
Back to top
View user's profile Send private message Send e-mail Gallery Classifieds Feedback
ivwshane
Samba Member


Joined: May 19, 2011
Posts: 1113
Location: Sacramento ca
ivwshane is offline 

PostPosted: Sun Oct 28, 2018 10:28 am    Post subject: Re: Crossover pipe Reply with quote

When I heated it to try and remove the stud, I did not get it cherry red, did I need to?
_________________
77 westy 2.0 FI? (who knows)
71 ghia coup 1600dp
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Wildthings
Samba Member


Joined: March 13, 2005
Posts: 39104

Wildthings is offline 

PostPosted: Sun Oct 28, 2018 12:06 pm    Post subject: Re: Crossover pipe Reply with quote

ivwshane wrote:
When I heated it to try and remove the stud, I did not get it cherry red, did I need to?


Yes, that was what you should have done. You of course don't want to heat the stud super hot if you can avoid doing so so you can turn it out while the surrounding metal is expanded and soft. Another alternative is to just heat the stud right to the point of melting it and then let it cool, this may cause it to break free of the steel it is screwed into.
Back to top
View user's profile Send private message Gallery Classifieds Feedback
Display posts from previous:   
Reply to topic    Forum Index -> Bay Window Bus All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

About | Help! | Advertise | Donate | Premium Membership | Privacy/Terms of Use | Contact Us | Site Map
Copyright © 1996-2018, Everett Barnes. All Rights Reserved.
Not affiliated with or sponsored by Volkswagen of America | Forum powered by phpBB