How do you replace the ball joints on a 1984 Jaguar XJ6?

To replace the ball joints on a 1984 Jaguar XJ6, start by safely lifting the vehicle and removing the front wheels. Disconnect the lower control arm from the spindle and remove the old ball joint using a ball joint separator or a press. Install the new ball joint by pressing it into place, reattach the control arm to the spindle, and ensure all bolts are torqued to specifications. Finally, reassemble the wheels and lower the vehicle, checking for proper alignment afterward.