Special Tools

J 8001  Dial Indicator Set

NOTE:
• The vehicle must rest on a level surface.
• The vehicle must be stable. Do not rock the vehicle on the floor stands.
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
2. Clean and inspect the ball joint seal for cuts or tears. If the ball joint seal is damaged, replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement .
3. Support the lower control arm with a floor stand as far outboard as possible and raise the suspension to just below ride height.
Fig 1: Measuring Vertical Lash In Ball Joint
Courtesy of GENERAL MOTORS CORP.
4. Install the J 8001  or suitable dial indicator in a way to measure vertical lash in the ball joint.
CAUTION: Do not pry in such a way that the ball joint seal is contacted. Damage to the seal may result.
5. Gently lift or pry the suspension to induce ball joint movement.
6. If the dial indicator indicates a reading greater than 0.5 mm (0.02 in), replace the ball joint. Refer to Lower Control Arm Ball Joint Replacement .