07-11-16, 06:41 PM
Heat breaks down thread lock and also the expansion and contraction helps to break any corrosion so get the bolt as hot as you can. A soaking in penetrating oil also helps the longer you leave it soaking the better. Also working the bolt in and out helps to break the corrosion around the threads. If you just keep turning it out in one go you can get a build up of corrosion in the threads and then even though you cracked it loose all of a sudden it starts to tighten up again.