| Brake fluid should be changed every 1 - 2 years in order to
prevent moisture contamination from decreasing boiling point to an unsafe level. |
| Use of a pressure bleeder is the ideal way of achieving fast
and accurate results. Information on this page is based on the use of a pressure bleeder. |
| Always bleed brakes beginning at the furthest point from the
master cylinder. That order is : passenger rear, drivers rear, passenger front , drivers
front. |
| Connect pressure bleeder to reservoir and raise pressure to no
more than 2 bar ( 28 psi) |
| Find a piece of vacuum hose and run it into a clear bottle,
the hose should run into the bottom of a jar so the end becomes submerged in fluid as soon
as possible inside the jar. This will allow you to see any bubbles in the fluid quite
clearly |
| Drum brakes : Connect hose to the bleed screw on the wheel
cylinder and open screw. |
| Allow fluid to flow until it comes out clean and has no
bubbles. |
| Tighten bleed screw and remove hose. |
| Disc brakes : Connect hose to bleed screw on caliper and open
screw. |
| Allow fluid to flow until it comes out clean and has no
bubbles |
| Tighten bleed screw and remove hose. |
With ABS
|
| Perform the above, except : Before opening bleed screws, have
a second person hold the pedal to the floor. Open bleeder and have the second person pump
the pedal slowly and completely , 12 times. Hold the pedal down and tighten bleeder.
Repeat this procedure on all wheels. This procedure will remove all old fluid from the ABS
system. |
Part numbers
Bleed valve, front : 34 11 1 121 206
Bleed valve, front M3 : 34 11 2 660 180
Bleed valve, rear drum : 34 11 1 121 206
Bleed valve, rear : 34 11 1 153 197
Bleed valve, rear M3 : 34 11 2 660 180
Torques
Bleed screws : 3.5 - 5 Nm ( 2.5 - 3.5 ft lbs.)
