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

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IMPORTANT:

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

Observe Max. machining dimension per friction ring side See 34 11 FRONT WHEEL BRAKES E65/E66

Minimum brake disc thickness (MIN TH) See 34 11 FRONT WHEEL BRAKES E65/E66

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) . See 34 11 FRONT WHEEL BRAKES E65/E66

Stationary brake disc lathe:

In the case of stationary brake disc lathes, the brake disc must be removed . See 34 11 220 REMOVING AND INSTALLING/REPLACING BOTH FRONT BRAKE DISCS

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 caliper has must be removed . See 34 11 519 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT FRONT BRAKE CALIPER

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. See 34 11 FRONT WHEEL BRAKES E65/E66

Fig 3: Measuring Brake Discs Thickness

Courtesy of BMW OF NORTH AMERICA, INC.