Brake Caliper Piston, Removing And Installing, 1LA/1LB: 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.

Fig 1: Identifying Sealing Ring Installed In Brake Caliper

Courtesy of AUDI OF AMERICA, LLC

-- Insert the inner gasket in the brake caliper groove -arrow-.

-- Press the protective cap onto the brake caliper housing so that it contacts the brake caliper housing all around.

Fig 2: Pressing Protective Cap Onto Brake Caliper Housing So That It Contacts Brake Caliper Housing All Around

Courtesy of AUDI OF AMERICA, LLC

-- It should no longer be possible to remove the protective cap from the brake caliper housing by hand.

-- Apply a thin coat of Assembly Paste :G 052 150 A2 to the piston and gasket before inserting.

-- Press the brake piston lightly on the protective cap.

Do not tilt the piston to avoid damaging the sealing boot.

-- Blow out the protective cap on with pressurized air (max. 3 bar (43 psi)). The protective cap will thereby jump over the brake piston.

-- Press the brake pistons into the caliper using :T10145 .

Fig 3: Pressing Piston Into Brake Caliper Housing Using Piston Resetting Tool T10145

Courtesy of AUDI OF AMERICA, LLC

Do not tilt the piston to avoid damaging the sealing boot.

NOTE:

The inner sealing lip of the protective cap thereby slips into the groove on the piston.