Stripping down the unknown turbo in my mates 2wd saff and 2 of the turbo to manifold studs snap, managed to get one out with a stud extractor but the other isn't going any where, its "waisted" down to less than 6mm so the stud extractor wont grip it any more, tried heat and a vice grips but that just snapped it off...

Then 3 of the 6 bolts that hold the turbine housing on snapped, whilst drilling a pilot hole in one the bit snapped and is now jammed in there. Got a hole drilled in another and then the "hardened steel" screw extractor snapped in it....

Is the turbine housing scrap...???