Seeing how easy it is to take out head studs (red loctite requires heat on the spigot, then it comes out like butter with a simple extractor from hardware store, see link below), I'd replace all of them without a second thought.
Straight forward head stud removal using torch and simple extractor:
https://forums.pelicanparts.com/911-engine-rebuilding-forum/1048731-broken-head-studs-2.html
Phil
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81 SC.
930/16 (us model)
Last edited by ahh911; 12-10-2025 at 06:40 AM..
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