Overhauling left or right front brake caliper (brake caliper removed)

Necessary preliminary tasks:

Remove the FRONT BRAKE CALIPER .

WARNING: In the following operation, large forces occur at the brake caliper piston.
Danger of injury!

Carefully force piston out through connecting bore with compressed air.

To protect the piston, place a protective plate (e.g. hardwood or rubber plate) in the caliper recess.

Do not grip piston with fingers - pinch hazard!

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Press off dust boot (1).

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Carefully remove sealing ring (1).

Clean cylinder bores and parts and dry with compressed air.

Thoroughly inspect cylinder bore, piston and flange surfaces for damage.

Material removing rework on cylinders and pistons is not permitted.

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Insert sealing ring (1).

Apply a light coat of ATE BRAKE CYLINDER PASTE to cylinder bore, piston and sealing ring,

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Fit dust boot (1) in annular groove of piston (2).

Attention!

Do not twist brake piston.

Press piston into cylinder bore.

Evenly press dust boot (1) onto brake caliper housing up to limit position.

NOTE: The area between the dust boot and the brake caliper housing must be kept dry. It must not come into contact with Ate brake cylinder paste or brake fluid so as to ensure that the dust boot is perfectly fitted.

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Install FRONT BRAKE CALIPER .