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Wheel Alignment (Procedures): OPEL: Adjustment: Caster

  1. If caster is not within specifications, adjust by changing washers on upper control arm shaft. Raise vehicle and place jack stands under lower control arms. Remove wheel on side which requires caster adjustment.
    NOTE: The replacement of washers requires the same diameter as those being changed and a combination such that the total thickness of front and rear equals 12 mm. If specifications are not achieved, frame alignment is required.
  2. Loosen hex. nut from upper control arm shaft and remove shaft. Adjust caster by replacing washers on control arm shaft. Put smaller washer on leg nearest front of vehicle.
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