Front Upper Arm: Inspection

Check the bushing for wear and deterioration.
Check the upper arm for bending or breakage.
Check the ball joint for rotating torque.
1. If there is a crack in the dust cover, replace it and add grease.
2. Move the stabilizer link ball joint stud several times in a circular motion.
3. Mount the self-locking nut on the ball joint, and then measure the ball joint rotating torque.
  Standard value:
  
  0.5 ~ 1.5 Nm (5 ~ 15 kgf.cm, 0.36 ~ 1.09 lb-ft)
  
  Fig 1: Measuring Ball Joint For Rotating Torque
  Courtesy of HYUNDAI MOTOR CO.
4. If the rotating torque exceeds the upper limit of standard value, replace the upper arm assembly.
5. Even if the rotating toque is below the lower limit of the standard value, the ball joint may be reused unless it has drag and excessive play.