How do you replace the upper ball joint on a 1992 Acura Vigor?

To replace the upper ball joint on a 1992 Acura Vigor, start by lifting the vehicle and removing the front wheel for access. Disconnect the upper control arm from the steering knuckle and any associated components, then remove the ball joint retaining nut. Use a ball joint separator or a suitable tool to detach the ball joint from the control arm, and replace it with a new one, ensuring proper alignment. Reassemble all components, torque the fasteners to the manufacturer's specifications, and reinstall the wheel.