I’m looking for technical help or recommendations on: I was trying to replace my lower ball joints but the pin is stuck as it doesnt leave any room for me to use the plier to clamp it out.
I had this too, so common, and the split pin doesn’t really do a lot as the nut can still turn a small amount and slacken. However, failed an MoT because they were missing after my own polybush installation.
As it is so awkward, a number of different tools may help (pad saw, dagger saw, grinder), but mine were so rusty that I was able to twist the ends with pliers until they broke off, then post MoT I drilled out the remains.
Split pins are soft steel. Usually if you get a good fit socket or spanner on the nut it will just shear split pin off without damaging nut and nut will wind off.