BMW 7 Series: Additional Work For Camber Correction

IMPORTANT: Changes in axle geometry caused by accidents must under no circumstances be rectified by camber adjustment!

NOTE: The upper control arm may only be replaced if the camber is outside the specified tolerance after toe adjustment.

Adjust TOE-IN.

Check camber values; if necessary, replace upper control arm with over- or under-dimension variant.

NOTE: Control arms with + or - marking (see illustration) are camber correction arms:

- Underdimension variant

+ Overdimension variant

These camber correction arms are used to correct the camber values by 30 minutes. To be used only if the tolerance values are exceeded or undershot!

An unmarked control arm is a standard part.

Fig. 1: Identifying Under And Over Variant Dimension On Control Arm

After Installation note

• Check directional stability of car; if necessary, repeat TOE-IN adjustment

ADJUSTING REAR AXLE

IMPORTANT: Altered procedure from previous axle alignment!

Turning the adjusting screw on the swinging arm or on the wishbone always results in a camber and toe change! Separate camber or toe adjustment is no longer possible! Specific camber and toe adjustment is only possible with the aid of the following diagram!

NOTE:

Vehicles with Adaptive Cruise Control only:

• After an adjustment of the rear axle which alters the driving axle, check adjustment of LRR sensor. See ADJUSTING REMOTE SENSOR (LRR SENSOR).

Vehicles with rear axle slip angle control only:

• Carry out adjustment of rear axle only with aid of BMW Diagnosis and Information System

Procedure, lane/camber adjustment (in design position)

Fig. 2: Lane/Camber Adjustment Measurements (In Design Position

Unit of measurement in diagram: [min]

1. Toe
2. Camber
3. Toe / camber value adjustment by wishbone
4. Toe / camber value adjustment by swinging arm

1. Actual value
2. Intermediate adjustment value
3. Nominal value in KO position

Description using the example value entered at the top of the diagram:

1. Read off actual value (1) for toe/camber on wheel/axle alignment analyzer and enter in diagram

(in example: toe -15', camber -90')

2. Drag parallel line to "Wishbone" line (C) through entered actual value (1)

3. Point of intersection (2) on "Swinging arm" line (D) produces toe/camber intermediate adjustment value

(in example: toe -4', camber -108')

4. Adjust intermediate adjustment value (2) by turning adjusting screw on wishbone

• Refer to operation described below "ADJUSTING ON WISHBONE"

5. Adjust nominal value (3) for toe/camber by turning adjusting screw on swinging arm (toe/camber value moves on line (D) )

• Refer to operation described below "ADJUSTING ON SWINGING ARM"

Procedure, toe/camber adjustment for ride-height-dependent measurement (unloaded)

Fig. 3: Toe/Camber Adjustment Measurements For Ride-Height-Dependent (Unloaded)

Unit of measurement in diagram: [min]

1. Toe
2. Camber

  C1. Toe / camber value adjustment by wishbone
  D1. Toe / camber value adjustment by swinging arm

3. Specified nominal value from wheel/axle analyser system

Description of adjustment using the diagram (ride-height-dependent measurement/unladen)

1. Read off nominal value (3) at wheel/axle analyzer and enter in diagram (in example: toe +12'/camber - 78')

2. Move lines (D) and (C) in parallel so that the point of intersection of the two lines (D1 and C1) is the entered nominal value

3. Read off actual value (1) for toe/camber on wheel/axle alignment analyzer and enter in diagram

4. Further procedure as when adjusting in design position:

• Drag parallel line to "Wishbone" line (C 1) through entered actual value
• Point of intersection on "Swinging arm" line (D1) produces toe/camber intermediate adjustment value
• Adjust intermediate adjustment value by turning adjusting screw on wishbone
  • Refer to operation described below "ADJUSTING ON WISHBONE"
• Adjust nominal value (1) for toe/camber by turning adjusting screw on swinging arm (toe/camber value moves on line D1)
  • Refer to operation described below "ADJUSTING ON SWINGING ARM"

Adjusting on wishbone

Replace nut (1) prior to adjustment and join to 5 Nm.

Turn eccentric screw (2) until intermediate adjustment value is obtained.

Tighten nut (1).

Tightening torque 33 32 7AZ.

Fig. 4: Identifying Wishbone Nut And Eccentric Screw

Adjusting on swinging arm

Replace nut (1) prior to adjustment and join to 5 Nm.

Turn eccentric bolt (2) to adjust nominal value.

Tighten nut (1).

Tightening torque 33 32 2AZ.

Fig. 5: Identifying Swinging Arm Nut And Eccentric Bolt

Diagram dependence toe/camber adjustment (for printing and entering values)

Fig. 6: Diagram Dependence Toe / Camber Adjustment (For Printing And Entering Values)

Adjusting Toe-In On Front Axle

NOTE: Camber and toe-in influence each other. Adjust the toe-in first in order to simplify the adjustment procedure.

Version with active steering

• Align steering wheel
• Set total steering angle to "zero" by means of the service function CARRY OUT INITIAL OPERATION/ADJUSTMENT FOR ACTIVE STEERING.
• If necessary, secure with steering wheel arrester

Version without active steering

Remove front UNDERBODY PROTECTION.

Move steering into straight-ahead driving position by means of markings on cap (1) and steering box (2).

Align steering wheel and secure with steering wheel arrester.

Fig. 7: Locating Straight-Ahead Driving Position Mark On Steering Box Cap

Clean thread on track rod.

Slacken clamping nut (2), gripping track rod end (1) in the process.

Remove clamp (4).

Turn track rod (3) to adjust toe-in to setpoint value.

Version with active steering: Check total steering angle; if necessary, set to "zero".

Check toe values, repeat adjustment if necessary.

Tighten down clamping nut (2).

Fig. 8: Identifying Track Rod With Clamping Nut, Track Rod End And Clamp

Tightening torque 32 21 2AZ.

Fit clamp (4).

After installation

Check directional stability of vehicle; if necessary, repeat toe-in adjustment

ADJUSTMENT/INITIAL OPERATION FOR ACTIVE FRONT STEERING

NOTE: Adjustment/start-up of the active steering must be carried out:

• Before adjustment work on the front axle/steering
• After work on the steering column
• After replacement of following components:
  • Active front steering control unit
  • ICM control unit
  • Steering-column switch cluster (SZL)
  • Steering gear

Connect vehicle to BMW diagnosis system.

Select and carry out initial operation/adjustment for active front steering under Service functions.

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