REMOVAL & INSTALLATION
The upper ball joint is an integral part of the upper control arm. If the ball joint becomes worn or damaged, the control arm must be replaced.
- Shake the ball joint stud a few times, then install the nut to the stud and use a preload socket (MB990326 or equivalent) and an inch lb. torque wrench to measure the breakaway torque of the ball joint. The reading should be 3-22 inch lbs. (0.3-2.5 Nm).
- If the measured value is higher than the standard, the upper control arm must be replaced.
- If the value is lower than the standard, check that the ball joint turns smoothly without excessive plate. If so, the ball joint is OK.
- Also, check the ball joint dust cover for cracks or other damage, if found, the upper control arm must be replaced.