BMW 3 (E46). Manual — part 174
Brake pad lining thickness
To measure brake pad lining thickness:
-
Insert BMW special tool 34 1 260 at
either front right wheel or left rear
wheel
-
Move wheel until notch for brake
wear indicator can be seen through
wheel opening.
-
Insert tip of tool into notch so that
the body of tool rests on brake pad
backing plate (A), and tip touches
brake disc (B).
-
Replace pads if thickness is 3.0 mm
(0.12 in.) or less.
Brake rotor removal
Remove brake rotor mounting screw
(arrow).
Inspect rotor for cracksm signs of
overheating and scoring.
On original equipment rotors, the
minimum allowable thickness is
stamped on rotor hub. Measure
rotor braking surface with a
micrometer at eight to ten different
points and use the smallest
measurement recorded
Table c
.
If rotor does not pass minimum
thickness requirements or is
damaged replace rotor.nothing
Table c. Brake rotor reconditioning
specifications
Front
Rear
Vented rotor
wear limit
(min.
thickness)
20.4 mm
(0.80 in.)
17.4 mm
(0.68 in.)
Max.
machine
limit per
friction ring
side
0.8 mm
(0.03 in.)
0.8 mm
(0.03 in.)
WARNING!
Confirm rotor wear limit specifications
given in
Table c
with specifications
stamped on rotor shell and identified
with `MIN TH"
Table d. Brake rotor sizes
Model
Front
brake
rotor
Rear brake
rotor
323 i / Ci
286 x 22
mm
(11.3 x 0.9
in.)
276 x 19
mm
(10.8 x 0.7
in.)
325 i / Ci /
xi
328 i / Ci
300 x 22
mm
(11.8 x 0.9
in.)
294 x 19
mm
(11.6 x 0.7
in.)
330 i / Ci /
xi
325 x 25
mm
(12.8 x 1.0
in.)
320 x 22
mm
(12.6 x 0.9
in.)
Brake rotors should always be
replaced in pairs.
Clean rotor with brake cleaner
before installing.
When installing new rear brake
rotors, the parking brake should be
adjusted. See
Parking brake
.
Tightening torque
Brake rotor to hub
mounting screw
16 Nm (12 ft-lb)
Brake pad carrier removal
Remove brake pad carrier mounting
bolts (arrows) and remove pad carrier
from steering arm or trailing arm.
Tightening torques
Pad carrier to front
steering arm
110 Nm (81 ft-lb)
Pad carrier to rear
trailing arm
65 Nm (48 ft-lb)
340-4
Master cylinder
The brake master cylinder is mounted
to the front of the vacuum booster on
the driver side bulkhead.
CAUTION!
All U.S. market E46 vehicles are
equipped with Antilock Braking
System (ABS) and either Automatic
Stability Control (ASC) or Dynamic
Stability Control (DSC). Replacing
the master cylinder requires that the
braking system be properly bled by
an authorized BMW repair facility.
This procedure is necessary for the
braking and stability controls to
function properly.
Master cylinder, removing and
installing
-
Using a clean syringe, empty
brake fluid reservoir.
WARNING!
Brake fluid is highly corrosive and
dangerous to the environment.
Dispose of it properly.
Remove interior ventilation microfilter
housing:
Remove upper cover and
microfilter.
Open wiring harness loom (A) and
remove wires.
Unfasten screws (B) and remove
lower microfilter housing.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст