Brake Caliper Piston, Removing And Installing: Installing

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-- The surface of the piston and seal must only be cleaned with mineral spirits or commercially available and then dried.

-- Apply a thin coat of Lithium Grease G 052 150 A2 to the piston and seal before inserting.

-- Insert oil seal in brake caliper housing.

Fig 1: Inserting Oil Seal In Brake Caliper Housing

Courtesy of AUDI OF AMERICA, LLC

-- Install protective cap on piston.

Fig 2: Identifying Protective Cap On Piston

Courtesy of AUDI OF AMERICA, LLC

-- Push piston into brake caliper housing using constant pressure.

Fig 3: Using Equal Pressure To Push Piston Into Brake Caliper Housing

Courtesy of AUDI OF AMERICA, LLC

The protective cap must be seated properly in the groove, push slightly farther if necessary.