New brembo rotors don't fit, wtf?

[SchnellE34]

Finally got around to putting my new Brembo rotors on the car. I put the new rotor on the wheel hub and started tightening the screw but after it was as tight as it would go, the rotor still was on secure and whobbled. WTF?

I pulled it off and checked the bolt size, same as the old one. Then I checked the hole depth for the bolt, it's deeper on the new Brembo than on the old rotor. The hole for the single mounting bolt of the Brembo is sunk deeper than the old rotor. Therefore when I tighten the bolt as far as it will go, there is still a gap between the bolt and the rotor. I am sure I have the right Brembo rotor (34 11 1 160 936) same part number as Realoem.com

Here some pics of the Brembo:

http://us.a2.yahoofs.com/users/43bb6aa5ze121a25e/6179/__sr_/ef7b.jpg?pho6cNEB3bfyXauz


http://us.a2.yahoofs.com/users/43bb6aa5ze121a25e/6179/__sr_/7bc9.jpg?pho6cNEB2eL9UPzJ

Do I have the wrong rotors? I went to Home Depot for a washer but they don't have anything that exact or in metric. The best I could do would be to buy a washer and drill the hole bigger. Should I get a washer?

[Kalevera]

Without going into detail, I'd say that a preliminary problem is that the process is wrong. Read Don Gale's site on how to mount rotors.

The rotor could be defective. Remember Josh's new warped rotors of a few weeks back? I've been reading about a lot of such incidents with new brembo rotors as of recent. But it's a far cry, I'd say. Check your process. The set screws aren't even necessary.


best, whit

[SchnellE34]

I don't have Don's site, could you give me a link?

[MBXB]

http://www.nmia.com/~dgnrg/page_2.htm

[SchnellE34]

ok I will copy Don's procedure, thanks very much.