Sheared a bolt head -how I get the bolt bit out with no head

wingz123 · Sep 3rd, 2011, 20:02

Yeah so was fitting the rear seats in my v40 today (recently bought leathers to go in and was doing the last bolt up on the drivers side rear seat (so this is the small section) and blimin did it up too tight. One final turn and I sheared the bolt head off so now the threaded part of the bolt is stuck in the hole with no head!!

Being a seat, I can only use that hole to put the bolt into to hold the seat in place. At the moment the seat isn't really useable because if you lean back the seat falls back quite a bit....

So no one sitting in that seat until I get it sorted...

Can anyone offer any advise on this please?

thank you,

James

mikealder · Sep 3rd, 2011, 20:13

Take the seat out and use a dremel with a small cutting disk fitted to it to grind a slot in whats left of the bolt shank, next use an impact driver to get the bolt moving followed by a screwdriver once its freed off enough, get a new bolt and only torque load it to two white knuckles rather than five - Mike

brodgar · Sep 3rd, 2011, 20:14

1--some thread sticking out???---- get grips

2--any chance you can get to the thread from the other side???

3-- carefully drill the remainder out. start with very small drill as a guide.

4-- get something welded to the remainder of the thread.

---- apparently it is a front seat??? any way of wedging something underneath
so that it doesnt tilt????

wingz123 · Sep 3rd, 2011, 20:23

Hi brodgar, no we are talking about the rear drivers side seat in the back,

No chance of being able to weld anything to it, there's not really any thread sticking out....its so annoying I really wish I hadn't done it up that tight! I just thought seats....3 month old daughter........SAFETYYYY!!!

noscralc · Sep 3rd, 2011, 20:36

Quote:

Originally Posted by wingz123

Yeah so was fitting the rear seats in my v40 today (recently bought leathers to go in and was doing the last bolt up on the drivers side rear seat (so this is the small section) and blimin did it up too tight. One final turn and I sheared the bolt head off so now the threaded part of the bolt is stuck in the hole with no head!!

Being a seat, I can only use that hole to put the bolt into to hold the seat in place. At the moment the seat isn't really useable because if you lean back the seat falls back quite a bit....

So no one sitting in that seat until I get it sorted...

Can anyone offer any advise on this please?

thank you,

James

being as you've sheared it by overtightening it should come out ok.my method would be to use an easy out as they're called or sometimes called a stud extractor. they are like a tap with a left hand flute on them so as you try to undue the flue drives itself in and draws the stud out.easy to use just drill a hole down the centre of the broken bolt, tap the easy in gently then get a tapwrench or similar on the square end of the extractor.fine for this type of shear but forget it if you've twisted the head off a rusted bolt.used them a few times with total success.good luck.

wingz123 · Sep 3rd, 2011, 20:38

thanks mate, father in law actually suggested this....would you happen to know where and what sort of price I am looking at for this 'kit'?

thanks,

SonyVaio · Sep 3rd, 2011, 20:42

As mentioned your options are then drilling or you could try an 'easy out' or even a combination of both drilling with small drill bit and then get and easy out on the job.

mike210970 · Sep 3rd, 2011, 20:45

machine mart ,halfords or a good local independant motorists part shop

wingz123 · Sep 3rd, 2011, 20:49

damn ok thanks - so how small would the initial drilling into the thread that is in the seat hole have to be do you think?

what size drill bit?

thanks,

noscralc · Sep 3rd, 2011, 20:52

Quote:

Originally Posted by wingz123

thanks mate, father in law actually suggested this....would you happen to know where and what sort of price I am looking at for this 'kit'?

thanks,

not sure if you can buy them individually or a set.a good tool shop should be able to advise if you can tell them the dia of the bolt you are trying to extract.dont bother with cheap chinese ones or you are liable to break that as well-made of chocolate lol!
good tools are not cheap unfortunately but generally cheap tools are no good.

Sep 3rd, 2011, 20:02	#1
wingz123 Member Last Online: Oct 31st, 2019 08:45 Join Date: Aug 2011 Location: Reading	Sheared a bolt head -how I get the bolt bit out with no head Yeah so was fitting the rear seats in my v40 today (recently bought leathers to go in and was doing the last bolt up on the drivers side rear seat (so this is the small section) and blimin did it up too tight. One final turn and I sheared the bolt head off so now the threaded part of the bolt is stuck in the hole with no head!! Being a seat, I can only use that hole to put the bolt into to hold the seat in place. At the moment the seat isn't really useable because if you lean back the seat falls back quite a bit.... So no one sitting in that seat until I get it sorted... Can anyone offer any advise on this please? thank you, James __________________ Currently driving..... 1995 Volvo 850 GLT TDi (OBD2)

Sep 3rd, 2011, 20:23	#4
wingz123 Member Last Online: Oct 31st, 2019 08:45 Join Date: Aug 2011 Location: Reading	Hi brodgar, no we are talking about the rear drivers side seat in the back, No chance of being able to weld anything to it, there's not really any thread sticking out....its so annoying I really wish I hadn't done it up that tight! I just thought seats....3 month old daughter........SAFETYYYY!!! __________________ Currently driving..... 1995 Volvo 850 GLT TDi (OBD2)

Sep 3rd, 2011, 20:38	#6
wingz123 Member Last Online: Oct 31st, 2019 08:45 Join Date: Aug 2011 Location: Reading	thanks mate, father in law actually suggested this....would you happen to know where and what sort of price I am looking at for this 'kit'? thanks, __________________ Currently driving..... 1995 Volvo 850 GLT TDi (OBD2)

Sep 3rd, 2011, 20:49	#9
wingz123 Member Last Online: Oct 31st, 2019 08:45 Join Date: Aug 2011 Location: Reading	damn ok thanks - so how small would the initial drilling into the thread that is in the seat hole have to be do you think? what size drill bit? thanks, __________________ Currently driving..... 1995 Volvo 850 GLT TDi (OBD2)

Sep 3rd, 2011, 20:13	#2
mikealder VOC Member Last Online: Nov 6th, 2016 10:18 Join Date: May 2009 Location: Blackpool UK	Take the seat out and use a dremel with a small cutting disk fitted to it to grind a slot in whats left of the bolt shank, next use an impact driver to get the bolt moving followed by a screwdriver once its freed off enough, get a new bolt and only torque load it to two white knuckles rather than five - Mike

Sep 3rd, 2011, 20:14	#3
brodgar I've Been Banned Last Online: Nov 27th, 2012 10:56 Join Date: Feb 2009 Location: Forest Row	1--some thread sticking out???---- get grips 2--any chance you can get to the thread from the other side??? 3-- carefully drill the remainder out. start with very small drill as a guide. 4-- get something welded to the remainder of the thread. ---- apparently it is a front seat??? any way of wedging something underneath so that it doesnt tilt????

Sep 3rd, 2011, 20:42	#7
SonyVaio VOC Member Last Online: Feb 26th, 2016 19:58 Join Date: Aug 2011 Location: Exmouth	As mentioned your options are then drilling or you could try an 'easy out' or even a combination of both drilling with small drill bit and then get and easy out on the job.

Sep 3rd, 2011, 20:45	#8
mike210970 New Member Last Online: Oct 23rd, 2012 09:11 Join Date: Jun 2011 Location: hull	machine mart ,halfords or a good local independant motorists part shop

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