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I removed my head studs by heating them a lot. I spent an hour heating them up and letting the heat soak down the stud and break down the loctite. Then I double nutted them and they all came out nicely, albeit a bit squeakily.
I use a heatgun and double nut. Dont know if it does anything "or if healthy" but i always give each stud a tap with a hammer before removal
Yes tap!!!. I did the same. A mechanic who's been working on 944's for many many years told me heat, heat, heat, and give them a tap to break the bond from the loctite.