31 11 506 Lowering/Raising Front Axle Carrier

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW 750i, 2008 BMW 750Li, 2007 BMW 750i, 2007 BMW 750Li, and 2006 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 2 030
00 2 040
31 4 011
31 4 012
33 3 274

WARNING: Danger to life!
Secure engine in installation position to prevent it from falling down. See 11 00 670 SECURING ENGINE IN INSTALLATION POSITION (N62, N62TU) .

IMPORTANT: Observe safety instructions on raising the vehicle .
Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Seal off hydraulic lines with plugs.

Necessary preliminary tasks:

Secure engine in installation position . See 11 00 670 SECURING ENGINE IN INSTALLATION POSITION (N62, N62TU) .
Remove underbody protective plate . See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION and 51 47 491 REMOVING AND INSTALLING/REPLACING REAR UNDERBODY PROTECTION .
Remove air duct for brake ventilation on both sides
Remove reinforcement plate . See 31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE .
If necessary, remove steering gear cover on both sides
Remove universal joint from power steering gear . See 32 31 211 REPLACING UNIVERSAL JOINT FOR LOWER SECTION OF STEERING SPINDLE .
Disconnect plug connection on Servotronic converter
Disconnect plug connection from ride-height sensor
If necessary, disconnect vacuum line from electrically operated valve to engine mounts at T-piece
If necessary, disconnect pressure line for power steering from front axle carrier

Version with Dynamic Drive:

Draw off and dispose off hydraulic fluid from fluid reservoir.

Observe country-specific waste-disposal regulations

Remove bottom right wheel arch trim .

Remove underbody panelling cover on right.

Release nut (1) for Dynamic Drive pressure line.

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

Release nut (2) for Dynamic Drive return line.

Tightening torque 37 14 21AZ . See INTEGRATED SUSPENSION SYSTEMS - TIGHTENING TORQUES .

Release nuts (3) for pressure lines to front axle oscillating motor.

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

Fig 1: Identifying Dynamic Drive Return Line Nut

Courtesy of BMW OF NORTH AMERICA, INC.

If necessary, position special tool 00 2 040 with a 2nd person helping on workshop jack 00 2 030 .

Insert special tools 31 4 011 and 31 4 012 into corresponding mountings of special tool 00 2 040 .

Fig 2: Identifying Special Tool (31 4 012) And (00 2 040)

Courtesy of BMW OF NORTH AMERICA, INC.

WARNING: Danger of injury!
Failure to comply with the following instructions may result in the vehicle slipping off the lifting platform and critically injuring other persons.

When supporting components, make sure that

the vehicle can no longer be raised or lowered
the vehicle does not lift off the locating plates on the lifting platform

Align special tool 00 2 040 to front axle carrier.

NOTE: Make sure when raising that special tools 31 4 011 and 31 4 012 are correctly inserted in the front or rear recesses on the front axle carrier.

If necessary, lower special tool 33 3 274 .

Support front axle carrier by raising special tool 00 2 040 .

Fig 3: Identifying Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Pay attention to power steering hoses and lines when lowering and raising. Hoses/lines must not be kinked/tensioned/bent!

Release screws (1, 2).

Lower front axle carrier.

Installation:

Check threads for damage; if necessary, repair with Heli-coil thread inserts.

Tighten down screws (1) and then screws (2).

Tightening torque 31 10 1AZ . See FRONT AXLE - TIGHTENING TORQUES .

Fig 4: Identifying Lower Front Axle Carrier Screws

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Version with Dynamic Drive:
- Fill and bleed hydraulic system . See 32 13 006 BLEEDING POWER STEERING (VERSION WITH DYNAMIC DRIVE) or 32 13 006 BLEEDING POWER STEERING UNIT .
- Check pipe connections for leaks
Carry out steering angle sensor adjustment . See 61 31 996 CARRY OUT STEERING ANGLE SENSOR ADJUSTMENT .
If necessary, carry out initial Dynamic Drive operation . See 37 10 001 INITIAL OPERATION WITH TEST RUN OF DYNAMIC DRIVE .