Quote:
Originally Posted by marc silva
Can someone explain to me why welding on a washer and nut onto a broken off stud would be any different than the nut that is already on the stud? I am referring to head nut removal. Seems to me that if you are trying to remove the head nuts and the stud breaks off it is pretty much stuck in the block. Why would welding another nut on be any different? if it didn't break free the first time why would it with a welded on nut? To me it would only work if the studs have been removed prior and the threads chased,and,had never seize or something on the threads making the stud unscrew easy with no bind on the threads. Thanks, Marc
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The welding process puts enough heat into the broken stud to cause it to expand a little, and then it shrinks as it cools. This helps to break the rust/carbon bond that is seizing the threads to the block.