Audi A4: Upper Control Arm, Removing and Installing

Special tools and workshop equipment required

• Vehicle Diagnostic Tester
• Torque Wrench 1331 5-50Nm -VAG1331-
• Torque Wrench 1331 Insert - Ring Wrench - 16mm -VAG1331/12-, not illustrated
• Torque Wrench 1332 40-200Nm -VAG1332-
• Engine and Gearbox Jack -VAS6931-
• Engine/Gearbox Jack Adapter - Wheel Hub Support -T10149-

  Caution

This procedure contains mandatory replaceable parts. Refer to component overview and parts catalog prior to starting procedure.

Mandatory Replacement Parts

• Bolt - for Upper Control Arm Bushing
• Bolt/Nut - Upper Control Arm Bushing to Wheel Bearing Housing

Removing

- Before starting the procedure, determine the curb weight position. Refer to → Chapter "Wheel Bearing in Curb Weight Position, Lifting Vehicles with Coil Spring".

- Remove the front wheel. Refer to → Chapter "Wheels and Tires".

- Turn the wheel hub, until a wheel bolt hole is at the top.

- Install the -T10149- with a wheel bolt -2- on the wheel hub.

  Note

Ignore item -1-.

- Support the wheel bearing housing over the -T10149- using the -VAS6931-.

  WARNING

Risk of accident!

• Do not lift or lower the vehicle when the -VAS6931- is under the vehicle.
• Do not leave the -VAS6931- under the vehicle any longer than necessary.

- Loosen the threaded connection -2-.

  Caution

There is a risk of damaging the wheel bearing housing.

The slits in the wheel bearing housing must not be widened using a chisel or similar tool!

- Remove the corresponding joint pins in the upper control arm -3- from the wheel bearing housing.

- Remove the bolt -1 or 4- and remove the corresponding upper control arm.

Installing

Install in reverse order of removal and note the following:

- Install the threaded connections for the components with bonded rubber bushings only until the stop, but do not tighten yet.

  Note

Bonded rubber bushings have a limited range of rotation. Only tighten the threaded connections for the suspension when the vehicle is in curb weight position.

- Lift the wheel bearing in curb weight position. Refer to → Chapter "Wheel Bearing in Curb Weight Position, Lifting Vehicles with Coil Spring".

Tightening Specifications

• Refer to → Chapter "Overview - Suspension Strut and Upper Control Arm"
• Refer to → Chapter "Wheels and Tires"

Upper Control Arm Bearing, Replacing

Special tools and workshop equipment required

• Subframe Bushing Tool Kit -3301-
• Bearing Installer - Multiple Use -3348-

  Caution

This procedure contains mandatory replaceable parts. Refer to component overview and parts catalog prior to starting procedure.

Mandatory Replacement Parts

• Bolt - for Upper Control Arm Bushing
• Bolt/Nut - Upper Control Arm Bushing to Wheel Bearing Housing

Procedure

• The upper control arm is removed. Refer to → Chapter "Upper Control Arm, Removing and Installing"

- Mark the press-in depth of the bonded rubber bushing, for example using a waterproof felt-tip pen.

Bonded Rubber Bushing, Pulling Out

- Clamp the control arm in a vise with protective covers.

- Arrange the special tools as shown.

- Remove the bonded rubber bushing -A- by turning the nut -arrow-.

Bonded Rubber Bushing, Installing

  Note

Do not use lubricant!

- Transfer the mark for the press-in depth from the old bonded rubber bushing to the new one.

- Arrange the special tools as shown.

- Install the bonded rubber bushing -A- by turning the nut -arrow-, while paying attention to the press-in depth mark made previously.

- Check the press-in depth for the bonded rubber bushing -1- inside the control arm -2-.

• Specified value: dimension -a- = dimension -b-.

- When the dimensions are different, tighten the bonded rubber bushings.

READ NEXT: