'89 Audi 200TQ Stripped O2 sensor boss

[Jim Jordan]

Hi John,

However you get it fixed so you can reinstall the O2 sensor, be sure to put
some anti seize compound on the threads when you reinstall.

Cheers!

Jim Jordan
 

>  -----Original Message-----
>  From: Jim Dupree [mailto:jdupree914 at sbcglobal.net] 
>  Sent: Thursday, June 30, 2005 4:37 PM
>  To: John Larson; brett at cloud9.net; Sonar465 at aol.com; 
>  quattro at audifans.com
>  Subject: Re: '89 Audi 200TQ Stripped O2 sensor boss
>  
>  I have had several over the years that looked really bad but 
>  I was able to run a tap thru what was left of the threads 
>  and they cleaned up OK. Not great but OK.
>  I was skeptical that they would hold but the new O2 
>  tightened down OK and stayed put. I have also had to 
>  installed an insert into my old 4k (4cyl) manifold as there 
>  was not enough left of the original threads.
>  
>  Good Luck
>  Jim
>  
>  
>  --- John Larson <j.d.larson at verizon.net> wrote:
>  
>  > The discussion has gone thusly:   "well the O2
>  > sensor came out along with
>  > the threads in the exhaust manifold.  What can be done in 
>  this case, 
>  > do I need a new exhaust  manifold?  can it be retapped?
>  > 
>  > Can't retap what isn't there, though I suppose you might 
>  be able to 
>  > helicoil it (no idea if expansion+contraction from the significant 
>  > heat cycles would affect it).  Finding an exhaust shop and 
>  having them 
>  > weld up a new bung would probably be cheaper, easier, and more 
>  > reliable in the long run."
>  > 
>  > It's 18mm, same as some older Ford spark plugs. 
>  > Inserts, as well as
>  > helicoils, are available, though you might have to find one of the 
>  > better (and older) automotive machine shops to do it.
>  > Since this isn't an uncommon
>  > problem, I'm sure you can find someone to fix it.  I do 
>  things like 
>  > that in-house, and on the car, and there must be other 
>  shops that do 
>  > that as well.  Worst case, you buy the appropriate kit and do it 
>  > yourself.  If that's the case, I'd look for an insert kit. 
>   Gonna be 
>  > far cheaper than a helicoil setup.  Welding a steel repair 
>  bung to a 
>  > cast iron manifold is out of the question, IMO.  John
>  > 
>  > _______________________________________________
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>  > quattro at audifans.com
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>  > 
>  
>  
>  

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