I'm still pretty new (15 months) to welding and usage of an O/A kit. But I seem to remember hearing you can use the heat the torch provides to loosen corroded parts- for example, nuts corroded onto bolts, or steel sleeves that should slide on guide-rods, and things of this sort.
I'm assuming that the best approach is to heat the outer part (sleeve, nut, or whatever) to red heat, so that the heat will expand that part (and possiby destroy some of the rust?). Is this correct?
I'm pretty sure you'd just want to use the outer flame ("flame envelope), not the extremely hot inner flame... wouldn't want to met anything. Just wondering if people here have had success with this method of using an O/A torch in situations where the corrosion is too great for penetrating oil to do the job.