If you can push the old stud out that is broken with like a hammer, just pound that sucker out. Take the new stud and wiggle it in the hole that you just removed the old stud from if you have clearence. Then take a lug nut that is open (you can see through the hole) and tighten it down till it's snug, get an impact wrench and socket and use the force of the lug nut pulling the stud into place. Much cheaper and how I would do it at Les Schwab tires. GL