Contents: Removal ↓ Installation ↓
Removal
Loosen the wheel bolts, lift the car from the front, and remove the wheels.
Caution: If the brake pads are to be re-installed, their location must be marked before removal. Swapping the pads, for example, swapping the outer pad with the inner pad or swapping the right wheel with the left wheel and vice versa, is not allowed. Changing the location of the pads may result in uneven braking action. It is recommended to use only genuine VW/AUDI brake pads. Front brake pads included, even if only one pad has reached the wear limit.
Using a screwdriver, press the spring that holds the brake pads out of the caliper housing and remove it.
Remove the protective caps and unscrew both guide pins from the caliper housing.
Pull the caliper body upward and place it so that the brake hose is not strained or damaged.
Remove the brake pads.
Installation
Caution: When the brake pads are removed, do not depress the brake pedal, otherwise the piston will be pushed out of the caliper body.
Note: Since 7/95, brake pads are installed oriented relative to the movement. Accordingly, on the back of the inner brake pad there is an arrow, which should point downwards when the pad is installed.
Clean the guide surfaces or lining areas of the pads with a suitable soft metal brush or wipe with a cloth soaked in alcohol. Do not use solutions containing mineral oils or tools with sharp edges.
Before installing the pads, examine the brake discs with your fingers to check for nicks. Discs with nicks can be ground down (workshop work), depending on whether they are thick enough. Always turn the discs on both sides and pay attention to whether there is enough wear reserve left after turning.
(The text is copied from this portal VWmanual)
Measure the thickness of the brake discs, see below.
Check the dust caps for cracks. Replace damaged caps immediately, as penetrating dirt will quickly damage the caliper seal. In this case, the caliper must be removed and disassembled (workshop work).
The brake cylinder piston is pushed back into the cylinder using a return device. A hardwood rod can also be used for this purpose (with a hammer handle), however, special attention must be paid to ensuring that the piston is not skewed and that the piston surfaces and dust cap are not damaged.
Note: When installing the piston into the cylinder, the brake fluid from the brake cylinder is squeezed into the expansion tank. Monitor the fluid level in the tank and, if necessary, suck out excess fluid with a siphon.
To suck out the fluid, use a bottle that was used to remove air from the hydraulic system, or a plastic bottle that has only been in contact with brake fluid. Do not use bottles intended for drinking liquids! Brake fluid is poisonous and should never be sucked out by mouth through a hose. Use a siphon. Brake fluid leaking from the reservoir gets under the master brake cylinder, destroys the varnish coating and causes corrosion.
Note: If the brake linings are heavily worn, check the ease of movement of the piston. To do this, insert a wooden block into the caliper and ask an assistant to slowly press the brake pedal. The brake cylinder piston should be easily pressed out and back in. During the check, another caliper should be installed in its place. Make sure that the piston is not pressed out completely. If the piston is difficult to move, the caliper must be repaired (workshop work).
Place the inner brake lining with the retaining spring against the piston of the wheel brake cylinder.
Note: If there are pads oriented relative to the movement, the arrow on the back of the pad must point downwards.
Insert the outer brake pad into the brake shield and remove the protective film from the back of the pad.
Insert the piston housing and tighten it to the brake shield using the guide pins to a torque of 25 Nm. Replace damaged protective caps of the guide pins (are included in the repair kit).
Insert both protective caps and the retaining spring into the caliper body.
Tighten the wheel. Lower the car and tighten the wheel bolts crosswise to 110 Nm.
Caution: Press the brake pedal firmly several times until you feel a strong resistance. This will center the brake pads and position them according to the operating conditions.
Check the brake fluid level in the expansion tank and, if necessary, top up the tank to the "MAX" mark.
New brake pads should be carefully worked in by repeatedly applying the brakes by lightly pressing the brake pedal. Allow the brakes to cool between braking operations.
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