Brake Caliper Piston, Removing And Installing, 1LA And 1LJ: Installing

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

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

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

Fig 1: Identifying Sealing Ring Installed In Brake Caliper

Courtesy of AUDI OF AMERICA, LLC

-- 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). 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.