View Single Post
      09-05-2013, 08:46 AM   #134
trey100
Lieutenant Colonel
trey100's Avatar
417
Rep
1,896
Posts

Drives: 2016 M3 6MT
Join Date: Jul 2007
Location: New York

iTrader: (0)

Quote:
Originally Posted by DVC
Quote:
Originally Posted by RPM90 View Post
YES, yes, yes! Properly bed them.

OP: You can find bedding guides all over the interwebs.
Specifically, look for Brembo's guide, it's easy to find.
Was just searching for a good bed-in procedure, and stumbled upon the Brembo .pdf... Here is the text:

Quote:
It is very important to follow proper brake bedding procedure following installation. This is necessary not only for optimum performance of the system, but also to avoid onset of judder (vibration felt through brake and steering). The discs are delivered with a thin zinc coating to prevent corrosion. Prior to beginning the bedding procedure, this plating must be removed from the braking surfaces by driving the car slowly (under 30mph) and performing very light brake applications in order to remove the plating without generating heat. With too much heat or pedal pressure, this plating can be deposited unevenly on the disc, and impregnated into the pad, further increasing the likelihood of judder development. Once a visual inspection of the braking surfaces confirms that the plating has been evenly removed, begin with the bedding procedure as specified below.
  • Drive vehicle to a remote area and perform at least 30 brake applications of 3 second duration. Use light/medium deceleration with varying starting speeds. Leave at least mile between each brake application
  • The purpose of this procedure is to gradually increase the temperature in the components without thermal shock, and to mate the brake pad and disc friction surfaces
  • After the repeated stops, drive the vehicle for several miles with little or no braking in order to adequately cool the components
  • The system is now ready for normal use

NOTE: This entire procedure must be complete before driving the vehicle as normal. It is especially important that this process is completed before any extended same-speed driving is done (i.e. freeway travel). Failure to follow these instructions greatly increases the likelihood of judder development.
I don't doubt that this bedding procedure is helpful but considering the car gets driven a bit before you receive it, it would seem that the initial bedding procedure can't be guaranteed. You would also need to by chance have the proper road to do the procedures right near the dealership of delivery. I can't imagine that BMW would sell a factory option that requires all of this. Perhaps that is the case for aftermarket Brembo brakes but I have to imagine that this long process is not completely required for a new factory vehicle. Is it mentioned anywhere in a BMW guide to do this?