Success! Got a vice grip around it, heated it with a torch, and managed to slip a crowbar between the header pipes which I smacked with a hammer to crack it loose. @ToyotaMatt I picked up that drain plug you suggested and it seems good! I’ll let you know the next time I do a drain…
Any advice on a tool to crack the block drain bolt to flush the coolant on a 2F? This seems like a pretty good option.
A couple years ago, I did a halfway job with a coolant refresh because I couldn't get that little square 13mm drain bolt loose with a puny box wrench. I picked up a six-point...