Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club General Forum
Register FAQ Image Gallery Members List Calendar Search Today's Posts Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 14th October 2019, 21:05   #1
macafee2
This is my second home
 
Rover 75 Saloon & Tourer

Join Date: Sep 2012
Location: Southampton
Posts: 8,822
Thanks: 877
Thanked 1,645 Times in 1,155 Posts
Default How I drilled my stud

I have been unable to remove a snapped stud on my exhaust.
item 1 here https://rimmerbros.com/Item--i-GRID001957

I found a Youtube clipe showing how to drill a stud that had snapped below the surface. Mine is above the surface but it gave me an idea on how to do it.
I got a connecting 10mm nut
https://www.toolstation.com/connecto...8aAmqzEALw_wcB

and a long length of 10mm stud and a single 10mm nut.
I put both nuts on the 10mm stud so the stud was flush with the surface on the connector nut, I locked the single nut against the connector nut.

I cut the stud flush with the single nut. I then put the unit into the chuck of my lathe, far enough back so the single nut was behind the jaws of the chuck and the connector nut held in the jaws.

I centre drilled the stud that was within the two nuts and then drilled the length of the stud with a 4 mm drill.

I repeated the above and made two more "units" but with a 6mm and a 7.5 mm hole.

The 2 nuts were unlocked and the drilled short length of stud removed.

Te connector nut was then put onto the snapped stud on my exhaut and the short length of stud with the 4 mm hole then screwed into the connector nut.

I now have a guide to drill through the centre of the snapped stud.
I put a centre drill in the 4mm hole to centre drill the snapped stud. I did this to try and make sure the next drill bit did not wonder even though it was in a guide. This was followed by the 4mm drill but it would not drill the stud.

I changed the 4mm guide for the 6mm guide and tried with a 6mm drill.
This worked and the 6mm guide was replaced by the 7.5mm guide and a 7.5mm drill used.
I removed the 7.5mm guide leaving only the connector nut attached to the snapped stud. An 8.5mm drill fitted nicely within the connector nut and so I started to drill. Alas not gently enough and snapped the already snapped stud much closer to the surface.

Without a guide I drilled 8, 9, 9.5 and 10mm. I am still unable to remove the snapped stud but now with a 10mm hole I am going to use a 10mm bolt and a brass nut.

The guides were magnificent.

macafee2
Attached Images
File Type: jpg stud and 2 nuts side by side.jpg (96.3 KB, 42 views)
File Type: jpg showing two nuts on stud 1.jpg (83.8 KB, 37 views)
File Type: jpg showing two nuts on stud.jpg (86.6 KB, 38 views)
File Type: jpg centre drilling.jpg (108.8 KB, 41 views)
File Type: jpg drilling.jpg (105.9 KB, 43 views)
File Type: jpg 3 guides.jpg (108.0 KB, 42 views)
File Type: jpg manifold with stud.jpg (78.2 KB, 40 views)

Last edited by macafee2; 15th October 2019 at 09:15..
macafee2 is offline   Reply With Quote
The Following 3 Users Say Thank You to macafee2 For This Useful Post:
Old 14th October 2019, 21:10   #2
macafee2
This is my second home
 
Rover 75 Saloon & Tourer

Join Date: Sep 2012
Location: Southampton
Posts: 8,822
Thanks: 877
Thanked 1,645 Times in 1,155 Posts
Default

a few more pictures. In the 3rd picture you can see the hole I drilled in the length of stud, now sliding a drill it up the ole it worked as a guide and helped me be centre and vertical

macafee2
Attached Images
File Type: jpg 2 nuts on stud.jpg (77.0 KB, 29 views)
File Type: jpg joining on stud.jpg (108.1 KB, 34 views)
File Type: jpg complete guide on stud.jpg (82.1 KB, 33 views)

Last edited by macafee2; 14th October 2019 at 21:12..
macafee2 is offline   Reply With Quote
Old 14th October 2019, 22:51   #3
T-Cut
This is my second home
 
Rover75 and Mreg Corsa.

Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 20,545
Thanks: 252
Thanked 3,050 Times in 2,492 Posts
Default

So you drilled out the splines in the flange to allow a 10mm nut and bolt to be used?


TC
T-Cut is offline   Reply With Quote
Old 14th October 2019, 23:47   #4
marinabrian
Baculum magicum
 
marinabrian's Avatar
 
A few too many

Join Date: Jan 2011
Location: The People's Republic of North Tyneside
Posts: 18,455
Thanks: 2,776
Thanked 8,873 Times in 4,853 Posts
Default

Quote:
Originally Posted by T-Cut View Post
So you drilled out the splines in the flange to allow a 10mm nut and bolt to be used?


TC
I was thinking that myself TC, and I'm sure a sharp bop with a parallel drift and a mash hammer would have worked wonders in removing the snapped stud

Or if an afternoon of playing about wasn't to anyone's taste, you could always buy a complete new bit HERE but where would the fun be in that

I came to the party a little late, but the "stud" is actually one of these

__________________
Almost at the end of the road........and I can categorically state this is NOT my second home

Sent from my Jupiter Ace running a 16k RAM pack and Chuck Moore FORTH
marinabrian is online now   Reply With Quote
Old 15th October 2019, 09:09   #5
macafee2
This is my second home
 
Rover 75 Saloon & Tourer

Join Date: Sep 2012
Location: Southampton
Posts: 8,822
Thanks: 877
Thanked 1,645 Times in 1,155 Posts
Default

Quote:
Originally Posted by T-Cut View Post
So you drilled out the splines in the flange to allow a 10mm nut and bolt to be used?


TC
I don't know about getting the splines out but I can get a 10mm bolt through the hole. The flange on the top still exists.

macafee2
macafee2 is offline   Reply With Quote
Old 15th October 2019, 09:11   #6
macafee2
This is my second home
 
Rover 75 Saloon & Tourer

Join Date: Sep 2012
Location: Southampton
Posts: 8,822
Thanks: 877
Thanked 1,645 Times in 1,155 Posts
Default

Quote:
Originally Posted by marinabrian View Post
I was thinking that myself TC, and I'm sure a sharp bop with a parallel drift and a mash hammer would have worked wonders in removing the snapped stud

Or if an afternoon of playing about wasn't to anyone's taste, you could always buy a complete new bit HERE but where would the fun be in that

I came to the party a little late, but the "stud" is actually one of these

ya that looks right and is what I originally thought was there.
As for fitting a new elbow, I really wanted to avoid that. I was worried about access to the top stud/bolt and snapping them.

macafee2
macafee2 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 Off

Forum Jump


All times are GMT +1. The time now is 14:06.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright © 2006-2019, The Rover 75 & MG ZT Owners Club Ltd