Removing And Installing/Replacing Pressure Line For Oscillating Motor/Rear Axle (Rear Pressure Lines)

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

33 0 170. See REAR AXLE - SPECIAL TOOLS .

IMPORTANT:

Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.

Seal off pipe connections with plugs.

After installation:

Fill and bleed HYDRAULIC SYSTEM. See 32 13 006 BLEEDING POWER STEERING (VERSION WITH DYNAMIC DRIVE) .
Check pipe connections for leaks.
If necessary, carry out INITIAL OPERATION FOR DYNAMIC DRIVE .

Necessary preliminary tasks:

Remove RIGHT UNDERBODY PANELING. See 51 47... REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT UNDERBODY PANELLING .
Remove right tank cover.
Convertible/Touring: Remove rear cross strut.

Release nuts at junction III.

Tightening torque, 37 14 13AZ. See INTEGRATED SUSPENSION SYSTEMS - TIGHTENING TORQUES .

Release screws (1).

Tightening torque 37 14 14AZ. See INTEGRATED SUSPENSION SYSTEMS - TIGHTENING TORQUES .

Installation:

Make sure pressure lines are laid without tension and with sufficient spacing to adjoining components.

Fig 1: Locating Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Installation:

Make sure pressure lines are laid without tension and with sufficient spacing to adjoining components.

Insert screws (1).
Align pressure lines to rear axle carrier.
Tighten screws (1)
Tightening torque 37 14 14AZ. See INTEGRATED SUSPENSION SYSTEMS - TIGHTENING TORQUES .

Fig 2: Identifying Rear Axle Carrier Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Remove stabilizer on rear axle carrier.

Release nuts (1, 2).

Feed pressure lines at top around rear axle carrier and remove towards rear.

Installation:

Pressure lines are protected against being mixed up by different thread sizes.

Tightening torque, 37 14 18AZ. See INTEGRATED SUSPENSION SYSTEMS - TIGHTENING TORQUES .

Fig 3: Identifying Stabilizer Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Risk of damage! Pressure lines must not have any contact with the stabilizer (minimum distance 5 mm)!

Assembly: Pressure lines to oscillating motor

NOTE:

Before the stabilizer is installed, the pressure lines must be aligned to the oscillating motor and secured using banjo bolts.

Installation:

Attach hollow nuts to oscillating motor, do not tighten down
Attach special tool 33 0 170 to pressure lines (the side of the special tool illustrated must point in the direction of the oscillating motor).
Tighten down nuts.
Tightening torque 37 14 18AZ . See INTEGRATED SUSPENSION SYSTEMS - TIGHTENING TORQUES .
Remove special tool

Fig 4: Identifying Special Tool (33 0 170)

Courtesy of BMW OF NORTH AMERICA, INC.