Replace The Wheel Studs on a Toyota 86, Scion FRS, and Subaru BRZ
Need to replace a broken wheel stud on your FRS/BRZ/86? Here's the easiest way to do it right.
My wife had a flat, so we put the spare on to get the car to the shop. For whatever reason, this resulted in one of the lug nuts becoming frozen to the wheel stud.
Unfortunately this required replacing the wheel stud. So I looked up a few different ways people replace them on the FRS/BRZ/86 twins and talked to my local, highly trusted wheel & tire shop (a "mom and pop" who's owners are heavily involved in the local autocross organizations).
The shop recommended the installation tool I link to in this article and it worked perfectly.
Remove the old Stud
Jack up the corner of the car you're working on and support with jack stands.
Use jack stands. Every single time. Too many people die from preventable accidents!
Remove the wheel. The lugs nuts are 19mm.
Remove the brake rotor.
The rotor may stick to the hub due to corrosion. Use some light percussive force or screw in a M8 X 1.25 bolt to force the rotor off.
Hammer the old stud out.
You'll need to hammer it from the front - out the back. If the stud snapped off at the base - you may need a center punch to get it out.
Install the new Stud
Slide the new stud in from the back.
Put the stud install tool in place over the threaded end of the stud.
The acorn side goes out, toward the lug nut.
Thread the lug nut onto the new stud. Tighten till the stud pulls itself into the hub. When the flange is fully seated against the back of the hub, you're done.
Install the Rotor
Install the wheel. Lug nut torque rating is 89 ft-lb. or 120 Nm