Wheel Bearing Housing
Wheel Bearing Housing
Special tools, testers and auxiliary items required
• Ball joint puller (3287A)
• Torque wrench (V.A.G 1332)
• Engine/transmission jack (V.A.G 1383 A)
• Angle wrench (V.A.G 1756)
Special tools, testers and auxiliary items required
• Spreader (3424)
Removing
- Loosen driveshaft bolt to wheel hub:
• Twelve-point bolt with ribs, refer to => [ Twelve-Point Bolt with Ribs, Loosening and Tightening, Driveshaft Threaded Connection ] Twelve-Point Bolt with Ribs, Loosening and Tightening, Driveshaft Threaded Connection
• Twelve-point bolt without ribs, refer to => [ Twelve-Point Bolt without Ribs, Loosening and Tightening, Driveshaft Threaded Connection ] Twelve-Point Bolt without Ribs, Loosening and Tightening, Driveshaft Threaded Connection
The wheel bearing must not be under a load while the driveshaft threaded connection on the wheel side is loose.
If the wheel bearings are under the load of the vehicle weight, the wheel bearing will be damaged. This reduces the service life of the wheel bearings.
The driveshaft bolt may be loosened maximum 90° when the vehicle is standing on its wheels.
Vehicles without a driveshaft must not be moved, otherwise the wheel bearing will be damaged. If a vehicle must be moved, be sure to note the following:
• Install an outer joint in place of the driveshaft.
• Tighten the outer joint to 120 Nm.
- Remove the wheel.
- Remove brake caliper with brake carrier and hang on body using wire.
- Remove ABS wheel speed sensor.
- Remove disc brake.
- Now remove cover plate from wheel bearing housing.
- Loosen nut of track rod ball joint, but do not unscrew yet.
To protect thread, screw nut on pin a few turns.
- Press off track rod ball joint from wheel bearing housing using ball joint puller (3287A) and now unscrew nut.
- Press the drive axle out of the hub as far as possible (in direction of transmission).
- Remove threaded connection of wheel bearing housing/suspension strut - arrow -.
- Insert spreader (3424) into slot of wheel bearing housing.
- Turn the ratchet 90° and remove it from the spreader (3424).
- Loosen nuts - arrows -.
- Now place engine/transmission jack (V.A.G 1383 A) under wheel bearing housing.
- First press off ball joint from control arm in order to then pull off the wheel bearing housing from suspension strut.
Installing
Installation is the reverse of removal, with special attention to the following:
- Tighten driveshaft bolt to wheel hub:
• Twelve-point bolt with ribs, refer to => [ Twelve-Point Bolt with Ribs, Loosening and Tightening, Driveshaft Threaded Connection ] Twelve-Point Bolt with Ribs, Loosening and Tightening, Driveshaft Threaded Connection
• Twelve-point bolt without ribs, refer to => [ Twelve-Point Bolt without Ribs, Loosening and Tightening, Driveshaft Threaded Connection ] Twelve-Point Bolt without Ribs, Loosening and Tightening, Driveshaft Threaded Connection
Vehicle must not rest on wheels when doing so.
With screw loosened, wheel bearing can be damaged by the vehicle weight.
Differences between a twelve-point bolt with ribs and a twelve-point bolt without ribs
The contact surfaces - arrow A - and - arrow B - are different on the two-point bolts.
I Twelve-Point Bolt with Ribs - arrow A -
II Twelve-Point Bolt without Ribs - arrow B -
If a wheel bearing housing was replaced, vehicle must be aligned => [ Vehicle Alignment Procedure ] Vehicle Alignment Procedure.
- Install the wheel and tighten the wheel bolts. Refer to => [ Tightening Specification for Mounting Wheels ] Specifications.
Tightening Specifications
