Bizarre brake situation, how can this happen?

[old911doc]

Oh, and one last thing, PLP is right, the little setscrews are more a convenience than a necessity, but I would suggest you should indeed use them, so that before you put the tire on you can rotate the disc to check that it is indeed not warped, and so you can check the bearing integrity (!!!). That said, they can certainly cause unnecessary grief by rusting in place, getting the head stripped, etc. So, use them, but with plenty of anti-seize paste, and tighten just ‘finger tight’. The heavy forces of braking are taken by the wheel lug bolts, or on studs ( in the case of…old 911’s…).

[Boxstard]

Originally Posted by old911doc

Oh, and one last thing, PLP is right, the little setscrews are more a convenience than a necessity, but I would suggest you should indeed use them, so that before you put the tire on you can rotate the disc to check that it is indeed not warped, and so you can check the bearing integrity (!!!). That said, they can certainly cause unnecessary grief by rusting in place, getting the head stripped, etc. So, use them, but with plenty of anti-seize paste, and tighten just ‘finger tight’. The heavy forces of braking are taken by the wheel lug bolts, or on studs ( in the case of…old 911’s…).

My impact driver is used almost exclusively for removing those little rotor set screws, works every time even when they got frozen. As noted already, they don’t bear much load so no need to be super tight and if you use anti-seize you will not have issue removing them. That said, they should not be omitted and obviously a shop who does such cannot be professional enough and trustworthy.