Brake Caliper Piston/Protective Cap/Gasket, Removing And Installing: Installing

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Install the entire repair kit.

Only use mineral spirits to clean the brakes.

When a piston wall is damaged, the brake caliper must be replaced.

-- Only clean the surfaces on the pistons and gasket with mineral spirits and then dry.

-- Apply a thin coat of Lithium Grease :G 052 150 A2 to the gasket before installing.

-- Insert the gasket into the brake caliper.

-- Place the protective cap on the brake caliper piston.

Fig 1: Identifying Protective Cap On Piston

Courtesy of AUDI OF AMERICA, LLC

-- Press the protective cap into the brake piston groove.

NOTE:

Pay attention to the correct installation position of the protective cap in the brake piston groove.

-- Apply a thin coat of Lithium Grease :G 052 150 A2 to the piston before installing.

-- Without tilting, push the brake caliper piston with inserted protective cap using constant pressure.

NOTE:

Do not tilt the brake piston when inserting in the brake caliper.

-- Insert the :T10145 and the :T40325 in the brake caliper.

Slowly press in the protective cap using the :T10145 and the :T40325 for the protective cap -1-.

Courtesy of AUDI OF AMERICA, LLC

The protective cap must fit tightly in the groove. If necessary, push down on it slightly with the :T10145 .
The protective cap must no longer be able to be pulled out of the brake caliper by hand.

-- Repeat the work procedure on the next brake caliper piston.