Sheared Exhaust Head Stud

[snavetrauts]

Yes I know.....!!!! I did all the correct things ... soaked it for days etc etc...The only thing I did not do is apply heat as I did not have my torch at the time.

So what do I do.... Where can I purchase new exhaust header studs. I now only have one on the near side and I am sure it will blow even with the new gaskets.

Any thoughts on how I may remove it... there is about half an inch of stud left protruding, the bit that sheared off was left in the nut!1

Any help greatly received... I have read many similar tales of woe on this site.... but never how to fix said problem. A search does not seem to throw up and solutions.

Help!!

[BockingBandit]

Mine was done by a local engineering firm in Braintree. It sounds as if mine snapped in exactly the same place as yours,.. they extracted the snapped stud and inserted a new one,.. i think they charged £15. However.. as a dispatch bike, .. i wasn't loking or a 'cosmetic match'.
Geoff

[snavetrauts]

Well I bought a professional set of stuad extractors which worked in the sense that it gripped the stud very well but just sheared off another 6mm or so.

So now I need to c/punch, drill and carefully remove the stud... it must be very corroded. I know there is a reaction between dissimilar metals but this is rediculous. I would put a blow torch on it but am worried about the petrol fumes around.. Looks like the tank may have to come off as well now. I wonder what more surprises the bike has in store for me??

Keep you posted

Stuart

[Boxadog 2000]

Tip.

Dont waste your time.

You will never remove the broken bit, remove head and machine it out on a fixture or you will end up with a hole somwhere near the exhaust port but nowhere near where it should be.

[snavetrauts]

If the bike was in England, I would have no problem.... I would not have attempted what I have done so far. However the bike is in Spain.... and I am a litle worried about offering this to the local guys in Murcia... they are a little agricultural.

I will probably fly into Birmingham in late March.... Does anyone know a good engineering company where I can drop it off and pick up one week later??

Can any of you brummies help me???

Stuart

[gus]

Hi
There is a little engineering shop a stones throw away from where i live.I know they do rebores and head work.Will ask the question for you if you so wish?
gus

[r550s]

Don't know if you've got enough stud left, or the right kit. But a often-succesful tactic is to electric weld a nut onto what's left of the stud. The heat can disturb the metal, and the nut gives you something to swing on. Done it thousands of times... well twice actually.

[julian]

Get it machined. I wasted a lot of time trying to extract mine. It's a 30 minute job removing the head. See here

£30 per stud plus £20 for a head gasket.

[snavetrauts]

Well I did it despite many on this site saying don't do it. Actually I agreed with most of them and still do. If I was in the UK, I would have no hesitation in getting it done professionally.

HOWEVER... here in spain I could not trust it, They are very agricultural to say the least. I drilled it out.... despite centre punching exactly in the right place, the drill still wandered. I used a undersze drill for the job and then used the dremmel to ease out the excess.. very carefully. I then retapped the thread and all seems well. I used a s/s bolt rather than a new stud for a tempory fix and will make up some studding for the final job.

I have to say I used two types of stud extractor (before actually drilling out) and both failed. The steel is crap but what surprised me so was the sheer difficulty in moving it even after drilling for the stud extractor. I applied intense heat... still no joy. I decided to drill it out eventually... the thought of a sheared extractor stuck in the hole did not excite. I can only assume BMW use some form of "loctite" when they assemble.. certainly not grease.

Oh what joy