34 11 552 Overhauling Left Or Right Front Brake Caliper (Brake Caliper Removed)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 BMW 760Li, 2006 BMW 760i, 2006 BMW 760Li, 2005 BMW 760i, and 2005 BMW 760Li. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see BRAKES - SPECIAL TOOLS .

Special Tools Required:

34 1 133

Bear in mind that guide sleeves and screws come in different lengths:

16" brake system: two short guide sleeves with two short screws.
17" brake system: one long guide sleeve and one short guide sleeve with one long screw and one short screw.
18" brake system: two long guide sleeves with two long screws.

Take off plastic caps (1).

Unscrew guide screws (2).

Installation:

Only clean guide screws; do not grease. Check guide bolts, replace if necessary.

E65 and E66:

Tightening torque, refer to 34 11 3AZ in BRAKES - TIGHTENING TORQUES .

Fig 1: Identifying Plastic Caps And Guide Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Dismantle brake caliper and remove brake linings.

Installation:

Press brake lining fully outwards and insert spring (4).

Fig 2: Identifying Brake Caliper And Spring

Courtesy of BMW OF NORTH AMERICA, INC.

WARNING: Danger of injury! In the following work step, large forces occur at the brake caliper piston up to more than 2800 N.

Carefully force piston out through connection bore with compressed air.

To protect piston, place a protective plate (e.g. hard wood or hard felt) in caliper recess.

Do not grip piston with fingers - risk of trapping!

Fig 3: Removing Piston From Connection Bore

Courtesy of BMW OF NORTH AMERICA, INC.

Check guide sleeves (5), fitting repair-kit guide sleeve if necessary.

IMPORTANT: Bear in mind that guide sleeves and screws come in different lengths. Long guide sleeve with long screw is seated on disc inlet at bottom, short sleeve with short screw is seated on disc outlet at top.

Fig 4: Locating Guide Sleeves

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Remove sealing ring carefully with a plastic needle.

Clean cylinder bores and parts with alcohol and dry with compressed air.

Thoroughly inspect cylinder bore, piston and flange surfaces. Machining of cylinders and pistons is not permitted.

Fig 5: Removing Sealing Ring With A Plastic Needle

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Apply a light coat of Ate brake cylinder paste to cylinder bore, piston and sealing sleeve, refer to OPERATING FLUIDS - BRAKES .

Install sealing cover in rear annular groove of cylinder bore. Press in piston with a hardwood board.

IMPORTANT: Do not tilt piston.

Fig 6: Application Areas On Brake Cylinder

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Press on dust protection sleeve evenly up to stop with special tool 34 1 133.

Installation:

The area between dust protection sleeve and brake caliper housing must be kept dry so as to ensure correct seating for the dust protection sleeve. Keep Ate brake cylinder paste or brake fluid away from this area. Make sure dust protection sleeve is correctly seated on piston.

Fig 7: Installing Dust Protection Sleeve On Piston

Courtesy of BMW OF NORTH AMERICA, INC.