snapped exhaust manifold stud

[OxtonyxO]

ok taken the exhaust manifolds of the 24v and oh no
2 manifold studs snapped
one was stuck in with exhaust paste
the other i snapped
so any ideas as to how to get them out?
i have drenched them in wd40 and there is enough to get hold of them with mole grips apart from that is it just a case of drill and tap

any ideas please

[motorwise]

have you got a MIG welder?

[rover]

Were on the same lines there Motorwise

And to save you asking Tony, if you have then you can weld another bolt to the end of whats left.

Rover.

[motorwise]

Were on the same lines there Motorwise

And to save you asking Tony, if you have then you can weld another bolt to the end of whats left.

Rover.

great minds think alike

[OxtonyxO]

yeah i have got a mig welder but dont think my welding is that good

[crazyscoot]

i Snapped a couple of studs on my car recently, got hold of a draper stud extraction set, heated up the block with blow tortch and after a bit of wrangling and swinging they came loose. Was about £10/£12 for the set, but you can only use them if you still have a stud it will grip

[Luke]

i always work on the principle if the stud sheared whilst being undone then a stud extractor (the drill and exract type) wont shift it!!

another tip with the mig is rather than welding a nut to it is weld a blob on the end of the stud then cool it then weld a blob on th bolb and so on then get the stillys on it - the advantage of doing it this way is its easier to get good contact with the 1st weld if you know what i mean!!!

[rover]

And the heat from the welding tends to make them easier to shift anyway

Rover.

[baconsdozen]

If the worst comes to the worst you'll have to drill it out.Starting with a small drill accurately in the centre and gradually increasing the size untill only the threads are left which can then be winkled out with a fine screwdriver or similar.Another way is to drill a series of fine holes in a line going through the centre of the stud so that the stud ends up in two halves.This needs accurate drilling,cobalt or similar drills and patience but lessens the chance of damaging threads.If a bit of the broken stud protrudes it will have to be ground flush to use eithe method.

[madmark]

collogne engines are prone to this happening!

[OxtonyxO]

thanks for all the help guys
will give the welding a nut to it a try
ive got some gas/air now so will heat it a little first
if it snaps i will drill and tap it
does anyone know the thread size for the tap?