Broken exhaust studs

OK, It's not a motorcycle, but I wouldn't think it would be any different than working on an old Pan Head, that was all rusted up. I might have the same problem with my Evolution engine some day.

I broke a couple of exhaust studs while removing the exhaust from an air cooled airplane engine. Anybody got any tips on how to remove those suckers? I've already broken 1 screw extractor and am running out of ideas.

I broke 4 out off 8 on my '82gs1100.It was an "outsider" before I bought it. I broke my taps also.Did you try heating the block first? I ended up tapping two theads smaller. Is that the right answer,I don't know,but it was good 'nuff for a 23 year old toy.

This engine is about 40 years old. Studs are pretty much a part of the head now. I did try heat, but maybe not enough. Plan on pulling the engine and taking it to a machine shop next week, before I screw it up beyond recoverability.

Oh yeah. I tried screw 'Screw Extractors' both Sears's version and SnapOn type (which are very good as you might expect). I ended up taking the whole engine to a machine shop. It took the machinist about 4 hours to remove them. Ended up having to put a helicoil in one (that's the one I F***** up the most with my amateur efforts). Thanks for the input.