Your plan has the disadvantage of putting your threads in peril.
There is a device called an Easy-out. It is conical and reverse
threaded. You drill a pilot hole then insert the easyout by turning
it anti-clockwise. Eventually it will "bottom out" grab the broken
bit of stud and unscrew it from your head.
You *must* be carefull though that you do not snap off the easy
out. They are hardend tool steel and if you break it off in your
stud, you will be in a world of hurt.
lrc
On Mon, Mar 27, 2000 at 11:23:22AM +0200, Louis Mehr (EML) wrote:
> Good Morning MG world,
>
> Yesterday I foolishly overtightened one of the studs on my cylinder head -
>one holding the exhaust manifold to the cylinder head.
>
> Needless to say the remains of the stud are flush with the surface of the
>cylinder head.
>
> I'd like to remove the stud with the minimum of hassle - I would be much
>happier if I do not have to remove the cylinder head.
>
> I've been told to drill a pilot hole and then drill bigger holes through the
>stud to clear the thread of the remnants of the stud.
>
> Sounds awkward to me.
>
> Anyone got any further advice on this ?
>
>
> Thanks
>
> Louis Mehr
> Manchester
> UK
> 1971 B US LHD roadster
> "scruffy but almost driveable"
>
>
--
I regret the mistakes I've made less than the opportunities lost from
risks not taken.
lrc@red4est.com http://www.red4est.com/lrc
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