Hi all got a manifold with a snapped bolt inside the manifold! As in no bit protruding..Try as I might I cannot get the broken stud out.. High tensile drill to drill a pilot hole for the screw extractor can't get it out.. Tried heat.. Still won't budge!

Just wondering if there were any other tricks!

Thanks so much
Tom

exhaust? or inlet? i.e. alloy or steel?

there is some good sprays these days that will loosen bolts up over a bit of time, an "easy-out" is really the only way then still... why is that not working?

more heat (lots of heat!) and then squirt on WD40 or similar. It gets sucked in around the threads and eventually loosens up..

And yeah, still need a screw extractor..

It's an exhaust manifold stud. The extractor isn't working. Because even with a pilot hole I cannot get all te way through the stud even with a brand new drill bit it's just not cutting into the stud at all te hole it has made is a mess with no clean thread

Will try more heat!!

Blow through it with an oxy and use a bolt instead of a stud, last resort perhaps.

if its not sheared flush at the manifold you can weld a bolt to the broken stud, let soak w/penetrating oil & try to remove that way. Usually works & I'd try that before blowing a hole thru the manifold flange.

Unfortunately it is not even flush it's about 30mminside the threaded area will try more heat!

Are you using the 'screw in' type extractor?-




If you are, you need to change to the punch in type-




They're made of a lot harder metal than the screw type. I've seen the square hammer in type pull out studs that the screw in doesn't even look like moving.

Use this, plus all the other great methods above and you should be a winner!

im using the screw in type! will see if i can track down the punch in type! thank you for the advice!!

and I've found even nicer.. Stud extractors
ABW,Lisle and Snap-on all do them, reasonable price too...