Thanks Peter. Yes I am aware of the hard spot theory. It may even be true. But when I put the new wheels on we had the car in the air and the rotor is warped so badly on the left front that it binds on every revolution. So anyone who says rotors don't warp and that the vibration is all from cementite or whatever hard spots, doesn't really know what they are on about. Or they never drove an older car.
I think the solid rotors warp far more than the vented ones. I imagine this is just a stiffness thing related to thickness, but also to heat dissipation and even the diameter. The rotor is too thin and the diameter is too small for the car, basically. In pedestrian use it is fine, but when you fail to notice the yellow until too late and go hard on the binders, then end up in the crosswalk, there is no creeping forward, no creeping backward. You can put the car in neutral or park and let off the brakes, but the rotors are done after one rapid stop. Kind of silly. We are talking a single aggressive stop from maybe 40 or 45 to zero, one time. On Sat, Dec 29, 2018 at 6:53 AM Peter Frederick via Mercedes < mercedes@okiebenz.com> wrote: > The cure for "warped" rotors after hard stops is to creep slowly forward > immediately after stopping. This keeps the pad contact time on a hot rotor > to the minimum and prevents carburization and material transfer from pad to > disk. > > not always possible, but minimal brake pressure after stopping and moving > the rotors under the pads will go a long way to preventing the hard spots > on the rotors that make them vibrate under braking. > > Peter > _______________________________________ > http://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 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
