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What are the best products to use to remove a bolt when it seems that the threads are locked to the bolts. Some people apply heat with a torch but that isn't always practical. WD40 might work in a light case of thread lock. I also use PB Blaster. Any other good suggestions?
R134a to freeze it. Someone came out with something in a can to freeze the bolt, making it contract, Wally World even selles it now in the Automotive section.
A long time ago when Freon was like .40 cents a can I used it on a Cadillac distributer to freeze the shaft that was stuck , it worked!
I've tried em all and PB blaster works better than anything else IMO. A good impact wrench can do wonders as mentioned before. I try to let it soak overnight. Put an impact on it, soak it some more, impact again. Patience is key. That, or you could allways use the 'hotwrench'.
I must add, my Dremel tool is one of the most important tools in my tool box now. (I don't have a blow torch, otherwise that would be #1, )
Changing the front brake pads a few years ago on my Blazer, I broke the caliper bolt head off while trying to remove it. I had to go to work in less than an hour, and I was a little upset. Called the local garage to see if they could torch it out, "Sure, bring it in 2 days from today"
So, I go out and re-assess the situation. I can see the stud between the outside edges of the caliper. Got out my Dremel, put a grinding wheel on it, and cut the stud, wiggled the caliper out, and put a "Vise-grips" on the end of the stud threaded into the caliper. There's a Napa store less than a half mile from my house. Bought a caliper stud rebuild kit. Made it to work on time that day.