Rear brake caliper piston, removing and installing

WARNING: This page is about a different variant/trim than selected.

Special tools and equipment

Fig 1: 3272 Resetting And Removal Tool

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fig 2: 3409 Wedge

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Removing

Fig 3: Screwing In Piston Using Special Tool 3272

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove piston out of brake caliper housing by turning the knurled wheel counter-clockwise.

NOTE:

Use special tool 3272/1 to help screw in.
If piston is difficult to move, use a 13 mm (512 in.) AF open end wrench on the flats (arrow -A-) provided for this purpose.

Fig 4: Removing Seal Using Wedge 3409

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Installing

The surface of the piston and seal must only be cleaned with methylated spirits and then dried.
Apply a thin coat of assembly lubricant G 052 150 A2 to piston and seal before inserting.

Fig 5: Identifying Protective Seal With The Outer Sealing Lip On The Piston

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fig 6: Inserting The Inner Sealing Lip Into The Grove In The Cylinder Using Wedge 3409

Courtesy of VOLKSWAGEN UNITED STATES, INC.

NOTE: Hold piston in front of caliper housing.

Fig 7: Screwing In Piston Using Special Tool 3272

Courtesy of VOLKSWAGEN UNITED STATES, INC.

NOTE:

Use special tool 3272/1 to help screw in.
If the piston is pushed back with a piston resetting tool or by operating the foot brake the automatic adjustment in the brake caliper is destroyed.