So My R53 has had some shudder under braking that was coming from what I believed to be warped rotors. Today I was taking off the rotors and calipers to replace then with new ones, and I discovered sheared bolts in the hubs. When I took off the caliper mounting bolts, the rotors almost fell off because the locator bolt was missing. Essentially the only thing holding the rotors on were the four wheel studs. I need help on what to do, should I try to drill out the studs? Or maybe replace them? Here is what it looks like;

 

Although nice to have, the rotor retaining bolt just helps hold it in place during assembly but once wheel is bolted up, the rotor is not going anywhere.
You replace the hub and u get a new wheel bearing. Looks like snow belt car. Use anti seize on the retaining bolt.
FYI some use anti seize on lugs. For the street it's ok yo use sparingly but check torque often.
For the track, NEVER EVER use anti seize on threads. They will not hold torque.
I discovered this at the track for myself.

 

The retaining screw isn't necessary. I wouldn't worry too much.

 

Its a non issue. As said just clean up that surface. A little antisieze around the hub so the wheels dont sieze on and ur goid to go.

U could try drilling it out and such if u realllllly realllllly wanted. Up to u.

Sent from my iPhone using NAMotoring

 

Ended up just making it work without drilling or anything. I used a combination of a wheel lug and a large nut to hold the rotor in place while I was working on the calipers. Pretty simple actually and everything feels good now that the car is back together.

 

That will work. Just keep that nut in your tool box with a tag on it that says. ROTOR HOLD DOWN.

Sent from my iPad using NAMotoring