Removing and installing/replacing both front brake discs
Special tools required:
- 34 1 280
- 83 30 2 459 458
Attention!
If required, washers for increasing the coefficient of friction (1) can be installed in some vehicles between wheel hub/brake disc and between brake disc/wheel rim (see the applicable BMW parts catalogue).
These washers must be reinstalled or replaced in case of damage!
Center or install the washer for increasing the coefficient of friction (1) with the help of special tool 83 30 2 459 458 (3 centering pins) on the wheel hub!
Necessary preliminary work:
- Remove FRONT WHEELS .
- Remove and clean BRAKE PADS .
Check minimum brake disc thickness:
- Position special tool 34 1 280 at three measuring points in area (1) and measure.
Compare measuring result and lowest value with setpoint value.
Brake discs may only be replaced in pairs (on each axle).
Attention!
New brake pads may only be fitted if the brake disc thickness is greater than the minimum brake disc thickness (MIN TH).
Attention!
To release brake disc: Do not under any circumstances strike friction ring with a hammer or similar!
If necessary, carefully tap on base of brake disc chamber with a rubber mallet.
Clean contact surface of brake disc at wheel hub thoroughly and remove traces of corrosion.
Unevenness on contact surface may result in distortion of brake disc!
Release both screws (1) and remove brake disc (2).
Installation note:
Replace screws.
Tightening torque 34 11 1AZ .