34 11 667 Precision-Turning Both Front Brake Discs On Both Sides

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2010 BMW M6, 2010 BMW 650i, 2009 BMW M6, 2009 BMW 650i, and 2008 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT:

Always precision-turn both sides of both brake discs on one axle.

Observe Max. machining dimension per friction ring side Minimum brake disc thickness (MIN TH)

Brake discs of M models (Compound brake discs) must not be machined!

Only one brake pad set may be used up on brake discs which have been lathe-turned to minimum thickness (MIN TH) .

Stationary brake disc lathe:

In the case of stationary brake disc lathes, the brake disc must be removed .

Please refer to the lathe manufacturer's instruction manual for the exact procedure.

IMPORTANT: Only BMW - approved brake disc lathes may be used!

Fig 1: Identifying Stationary Brake Disc Lathe

Courtesy of BMW OF NORTH AMERICA, INC.

Mobile brake disc lathe:

In the case of mobile brake disc lathes, only the brake calliper has must be removed .

The brake discs remain on the car.

Please refer to the lathe manufacturer's instruction manual for the exact procedure.

IMPORTANT: Only BMW-approved brake disc lathes may be used!

Fig 2: Identifying Mobile Brake Disc Lathe:

Courtesy of BMW OF NORTH AMERICA, INC.

After fine-grinding the brake discs, measure the thickness difference inside the braking surfaces at 8 points with an external micrometer.

Fig 3: Measuring Thickness Difference Inside Braking Surfaces

Courtesy of BMW OF NORTH AMERICA, INC.