Packard Forum Index » Pre-War (1899-1942)

For me, anything that's been together for a long time, I always try to wirebrush any exposed threads. It helps obvious clear threads of rust and dirt. But then allows penetrator to wick in deeper and in cases where those threads are then going back through a nut or a threaded surface on when being removed, helps to prevent crap that is wedged threads from damaging the threads in either surface upon removal.

My usually process is a quick shot of brake cleaner to soften/dissolve and grease/dirt. Then wirebrush, followed by penetrator. This really helps the penetrator do it's work.