exhaust bolt snapped off in head
Moderators: User administrators, Moderators
- Epiphone
- Registered user
- Posts: 167
- Joined: 22 Nov 2009, 21:20
- 80-90 Mem No: 7754
- Location: Munich, Germany (Redditch, Worcs)
exhaust bolt snapped off in head
Hi all,
damn, its happened - smooth seas never mailed a skilled sailor etc etc!
Thread was bad on this one anyway, hence my messing around!
whats the possibilities now?
I can't weld a nut onto that, its 1/4" deep
I drill it out and fit a helicoil
Start playing with bolt extractor sets?
can I do all this in situ, its back left so I can remove the heat shield and there is quite a lot of room
epi
damn, its happened - smooth seas never mailed a skilled sailor etc etc!
Thread was bad on this one anyway, hence my messing around!
whats the possibilities now?
I can't weld a nut onto that, its 1/4" deep
I drill it out and fit a helicoil
Start playing with bolt extractor sets?
can I do all this in situ, its back left so I can remove the heat shield and there is quite a lot of room
epi
- Attachments
-
- IMG_4150.JPG (115.07 KiB) Viewed 3015 times
- Jim San
- Registered user
- Posts: 2206
- Joined: 21 Jan 2014, 20:01
- 80-90 Mem No: 13133
- Location: Wales / Shropshire border
- Contact:
Re: exhaust bolt snapped off in head
Heat it, then shock it with a decent parallel punch to try and break the hold, soak with +gas etc,
I'd then opt for bolt extractor and take your time getting it centre.
I'd then opt for bolt extractor and take your time getting it centre.
1991 (LHD) Syncro kombi 1.9MTDi 1Z (Landy fuel pump) 215/70/16
Life's to short to drink s@@t beer.
'Roads? We don't need roads where we're going'
Life's to short to drink s@@t beer.
'Roads? We don't need roads where we're going'
- itchyfeet
- Registered user
- Posts: 12427
- Joined: 23 Jul 2007, 17:24
- 80-90 Mem No: 12733
- Location: South Hampshire
Re: exhaust bolt snapped off in head
Never tried bolt extractors but it's very usual for them to snap off I hear and then you can't drill it out, they are hard and you have to have them spark eroded, might as well scrap head so my 2p worth is DONT risk a stud extractor, drll it out
Last edited by itchyfeet on 25 Nov 2017, 15:14, edited 1 time in total.
- itchyfeet
- Registered user
- Posts: 12427
- Joined: 23 Jul 2007, 17:24
- 80-90 Mem No: 12733
- Location: South Hampshire
Re: exhaust bolt snapped off in head
if the other stud is out use a long bolt as a drill guide, your eye is very accurate, a piece of vac tube around your centre punch is good for getting it dead centre, start with a small drill and work up slowly
remember no more than 25mm deep or your head is scrap
not a head but same principle
P1060042 by Paul_Barr, on Flickr
P1060048 by Paul_Barr, on Flickr
remember no more than 25mm deep or your head is scrap
not a head but same principle
P1060042 by Paul_Barr, on Flickr
P1060048 by Paul_Barr, on Flickr
- tobydog
- Registered user
- Posts: 1384
- Joined: 07 Mar 2009, 21:03
- 80-90 Mem No: 6484
- Location: Near Saarfend, Essex
Re: exhaust bolt snapped off in head
As Itchy, I would drill it. Every time I've tried a stud extractor they've broken.
Knowledge is power
1970 CU
1970 CU
-
- Registered user
- Posts: 2824
- Joined: 05 Oct 2012, 08:55
- 80-90 Mem No: 11974
- Location: Salisbury
Re: exhaust bolt snapped off in head
tobydog wrote:As Itchy, I would drill it. Every time I've tried a stud extractor they've broken.
Stud extractors have a reputation to match that of Elite!! Steer clear of both.
Why would the glass be anything other than half full?
'89 panel van, 1.9 DG.
'89 panel van, 1.9 DG.
Re: exhaust bolt snapped off in head
The flaw with stud extractor is that they expand the stud and jam it in even harder. The harder you turn the harder they jam
CS
CS
Well-timed silence hath more eloquence than speech.
"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX
"A quiet shy boy who took little part in games or sport"
88 High top 2.1 WBX
- Epiphone
- Registered user
- Posts: 167
- Joined: 22 Nov 2009, 21:20
- 80-90 Mem No: 7754
- Location: Munich, Germany (Redditch, Worcs)
Re: exhaust bolt snapped off in head
Drilled it out now. It’s not the cleanest circular hole anymore.
It’s already larger than a M10, so could target M12 now.
Or would a helicoul be an alternative?
- Epiphone
- Registered user
- Posts: 167
- Joined: 22 Nov 2009, 21:20
- 80-90 Mem No: 7754
- Location: Munich, Germany (Redditch, Worcs)
Re: exhaust bolt snapped off in head
So far so good.
Cut the Thread out and inserted a helicoil for 1 size bigger. Had to make gasket and exhaust holes bigger too.
Seems to tighten up well. Now putting everything back together again and will fire it up again soon.
- itchyfeet
- Registered user
- Posts: 12427
- Joined: 23 Jul 2007, 17:24
- 80-90 Mem No: 12733
- Location: South Hampshire
Re: exhaust bolt snapped off in head
https://www.vwheritage.com/n0144832-rep ... 8-vw-spare" onclick="window.open(this.href);return false;