Yes, PB & Kroil, but additionally, I keep a pump can with a mix of ATF, Acetone, and a bit of whatever motor oil I have left from the last oil change. Works as well as anything else.
My HF Flux core welder isn't good for much, but it does apply focused heat to a stuck bolt. I had a Thermostat bolt on a car that broke and would not budge. After about a week of failure, I tried to weld a nut onto the stub. My weld gave out, but the bolt came out easily with vice-grips after that.
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I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
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