The data sheet says to heat to 482�F (250�C) and disassemble hot but Loctite begins to loose strength well below 200�F. It doesn't melt. Lesse if I can stick the data sheet charts in this...

Loctite 242 Blue
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Loctite 271 Red
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100�C = 212�F
120�C = 248�F
150�C = 302�F

For just plain tight ones an aircraft mechanic taught me to use a close fitting screwdriver, apply max safe torque, and give the screwdriver a good rap with the torque applied.

The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.