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Home >> BMW >> 2009 >> 650i 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1732 (Brakes - Repair) >> Front Brakes >> 34 11 552 Overhauling left or right front brake caliper (brake caliper removed)

34 11 552 Overhauling left or right front brake caliper (brake caliper removed)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required: 

NOTE: Use repair kit

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

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: 34 11 3AZ

Fig 1: Identifying Plastic Caps And Guide Screws
G04749409Courtesy of BMW OF NORTH AMERICA, INC.

Dismantle brake caliper and remove brake pads.

Installation: 

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

Fig 2: Identifying Spring
G04749410Courtesy 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: Placing Protective Plate In Caliper Recess
G04726600Courtesy 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 disk inlet at bottom, short sleeve with short screw is seated on disk outlet at top.
Fig 4: Identifying Guide Sleeves
G04726605Courtesy of BMW OF NORTH AMERICA, INC.

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 Plastic Needle
G04749413Courtesy 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 BRAKES - OPERATING FLUIDS .

Install sealing cover in rear annular groove of cylinder bore.

Press in piston with a hardwood board.

IMPORTANT: Do not tilt piston.
Fig 6: Pressing Piston With Hardwood Board
G04760527Courtesy of BMW OF NORTH AMERICA, INC.

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: Pressing Dust Protection Sleeve
G04760528Courtesy of BMW OF NORTH AMERICA, INC.
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