34 11 552 Overhauling front left or right brake caliper

WARNING: This page is about a different car, the 2008 MINI Cooper, 2007 MINI Cooper, 2006 MINI Cooper, and 2005 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, see BRAKES - SPECIAL TOOLS - COOPER (1.6L) R50/W10 .

Special Tools Required:

34 6 302
34 6 304
34 6 305

Necessary Preliminary Tasks:

Remove brake caliper. Refer to 34 11 519 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT FRONT BRAKE CALIPER .

IMPORTANT: Use only BMW approved repair kit.

Remove both brake pads.

NOTE: The inner brake pad is held by a spring in the piston.

Fig 1: Removing Both Brake Pads

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Carefully remove dust sleeve.

Fig 2: Removing Dust Sleeve

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

Carefully force piston out through connection bore with compressed air.

Fit a protective plate (e.g. hard wood or hard felt) in the caliper well to protect the piston.

Do NOT grip piston with fingers - risk of trapping!

Fig 3: Removing Piston Out Through Connection Bore

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Check guide sleeves (1) and fit repair kit guide sleeves if necessary.

Fig 4: View Of Repair Kit Guide Sleeves

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Carefully remove sealing ring with a plastic needle.

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

Thoroughly check cylinder bore, piston and flange faces.

IMPORTANT: Machining of cylinders and pistons is not permitted.

Fig 5: Removing Sealing Ring With Plastic Needle

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Installation:

Apply a thin coat of ATE brake cylinder paste to cylinder bore, piston and sealing sleeve.

Install sealing cover (1) in annular groove of cylinder bore.

Fig 6: Installing Sealing Cover In Annular Groove Of Cylinder Bore

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Fit dust sleeve (1).

Using a commercially available extension and socket, carefully press brake piston into the bore.

Fig 7: Identifying Dust Sleeve

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Make sure the dust guard is free of grease and brake fluid.

Use special tools 34 6 302, 34 6 304 and 34 6 305 to fit dust guard on brake caliper.

Fig 8: Installing Dust Guard On Brake Caliper Using Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.