I dropped my subframes to have them powder coated. Fronts are off, reinforced and ready to head to the powder coaters. The rear mounts are giving me a lot of issues. I've tried everything to get the rear mounts off. One nut came out and that bolt is free, but the other 3 nuts have sheared and are really stuck in there. I've PB blasted them over multiple days, torched, frozen and beaten them with a hammer, but these things won't budge. I'm reluctant to drill them out of the sleeves in the rear subframe.
Does anyone have suggestions?
My other concern is the amount of rust that has come out of the subframe. There are many pieces of rust that are an inch square or larger. Should I be concerned?
Thanks!