31 11 506 Lowering/Raising Front Axle Support

31 11 506 Lowering/raising front axle support (universal lifter)

Special tools required:







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 vehicle hoist.







IMPORTANT:
Before lowering/removing front axle support:
Observe safety information for raising the vehicle
In order to avoid damage to vehicle hoist, perform weight compensation on vehicle.
Load spring strut domes with sand bags.







Necessary preliminary tasks:
- Remove front wheels.
- If necessary, remove underbody protection.
- Remove complete exhaust system. (except for N47 front-wheel drive)
- Partially remove front left and right wheel arch covers at bottom.
- All-wheel drive vehicle: Remove propeller shaft at transfer box.
- N47 All-wheel drive vehicle: Remove turbocharger pressure pipe.
- Only on right with ride height sensor: Release plug connection at sensor and move back cable.

IMPORTANT: If the steering shaft is separated from the steering box, this can result in damage to the steering column switch cluster when the steering wheel is turned.







Release screw (1).
Tightening torque 32 31 2AZ
Detach lower section of steering shaft (2) from steering box and swing towards rear.

Installation note:
Clean thread to remove all remnants of screw locking adhesive.
Replace screw.







Disconnect plug connections (1) on steering box.

IMPORTANT: Make sure when lowering the front axle that the cables are not damaged.







Open securing plugs (1) and remove air guide (2). (right-hand side is identical).

Installation note:
Replace faulty securing plugs.







Disengage cable (1) of pulse sensor on left and right from holder on front axle support.

IMPORTANT: Make sure when lowering the front axle that the cable of the pulse sensor is not damaged.







Undo bolt (1) at anti-roll bar link (2).
Tightening torque 22 11 6AZ

Installation note:
First mount front axle support on engine support and then tighten screw (1).







Only N47:
Release nuts (1) at front pipe (2).
Tightening torque 18 20 7AZ. 00 00 Excerpt From Company Standard BMW GS 90003-2

Installation note:
Check rubber mount for damage, replace if necessary.







Undo bolt (1) at front panel strut.







Release screws (1) on bumper holder on left.
Tightening torque 51 11 4AZ







Release screws (1) on bumper holder on right.
Tightening torque 51 11 4AZ

IMPORTANT: Make sure when lowering the front axle that the cable of the air conditioning compressor is not damaged.

Unclip cable tie (2).
Cut open cable strap (3).

Installation note:
Replace faulty cable straps and cable clips.







Engage special tool 31 5 251 with a 2nd person helping completely on workshop jack 00 2 030.
Insert special tools 31 5 255 in telescopic supports of a profile rail pair.

NOTE: In a profile rail pair, two profile rails are connected to one another by gearing.

Insert special tools 31 5 253 in telescopic supports of a profile rail pair.







NOTE: The jacking points on the left side are shown.

Align special tools 31 5 255 and 31 5 253 to front axle support.
Support front axle support by operating workshop jack 00 2 030.







Unfasten screws (1) to (3).

Installation note:
Check threads for damage; if necessary, repair with Helicoil thread inserts.
Make sure screws are installed in correct positions.
- Screws (1)M12
Tightening torque 31 11 1AZ
- Replace screws (2) M10
Tightening torque 31 11 5AZ
- Screws (3)M12
Tightening torque 31 11 2AZ







Risk of damage.
When lowering the front axle support, it is absolutely essential to make sure that the control head (1) of the electric steering box (EPS) does not collide in area (2) with the bulkhead.
Collision with the bulkhead may result in damage to the electric steering box (EPS).







IMPORTANT: When lowering and raising, make sure there is freedom of movement between front axle support, transmission and A/C lines.

Lower front axle support max. to dimension (A) = 120 mm.







IMPORTANT: Gasket (1) of electric steering box (EPS) must always be replaced.