Franko Manini
Well-Known Member
No truer words have ever been said. The next advise goes along with that. Tighten the new bolts up to within a quarter turn of snapping, never more and sometimes even less.
Oly
Best approach I have used for a stuck bolt is heat, cool, penetrating oil, wait a day, rinse and repeat. Try to firmly, but cautiously remove the fastener before you start the next heating. The heating/cooling cycle induces little fissures in which the penetrating fluid can travel by capillary action. Can't say it has worked every time, but most times it is successful.