Last time I did rotors, I figured it was cheaper to just replace them if there is any doubt. An air impact wrench makes unbolting the rotor easy. But if you don't have one, screw the wheel back on the rotor (after removing from the car) flip it over and the tire/wheel will gold the rotor so you can unbolt the hub. Clean the contact surface between the hub and new rotor well before reassembly because debris can make the wheel and rotor run untrue. Repack the front hubs with fresh grease, preferably the bright green stuff from MBZ (assuming it's still green). Replace the grease seal if there is any doubt. Bearings seem to last forever unless abused (water leaks past grease seal, grease dried out, or wrong bearing play). The front bearings should be set with a dial gauge but I find they are just about right if you can just detect the least little movement (this can be tricky because fresh grease masks movement). And clean the rotors well with brake cleaner before installing new pads.
Oh yeah, Rusty is da man. -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Greg Fiorentino Sent: Monday, July 23, 2012 11:07 PM To: 'Mercedes Discussion List' Subject: Re: [MBZ] "Bleeding" Brakes Check the caliper thickness yourself against minimum thickness standards in the service manual to determine whether the rotors can be safely turned down. Chances are good that older worn rotors are already below specs, at least this has been true in the cars I have worked on. Greg -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Allan Streib Sent: Monday, July 23, 2012 7:39 PM To: Mercedes Discussion List Subject: Re: [MBZ] "Bleeding" Brakes Also if the rotors are pitted with rust, replace them. They will eat up the new pads in no time. A little dusty surface rust is not a problem, but if they are pitted or flaking they need to go. You can try to find a shop to turn them, but they uniformly tell me they are "too thin to turn" because I think they want me to go to the parts counter and buy new instead. Allan _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
