Tire and Wheel Assembly Runout Measurement - On-Vehicle

Special Tools

• GE-8001  Dial Indicator Set, or equivalent

For equivalent regional tools. Special Tools and Equipment 

1. Raise and support the vehicle. Lifting and Jacking the Vehicle
2. Closely inspect each tire for proper and even bead seating.
3. If any of the tire beads were not properly or evenly seated, reseat the tire bead, then proceed to step 4. Tire and Wheel Removal and Installation
4. Following the tire inflation placard on the drivers door, inspect and if necessary adjust the tire inflation pressures.

5. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   Wheel rim might not be the same on all vehicles. Graphic is for illustrative purposes only.

   Wrap the circumference of each tire with tape in the center tread area (1).

   Wrapping the tread with tape allows for a smooth and accurate reading of radial runout to be obtained.

6. Position the GE-8001  Dial Indicator Set on the taped portion of the tire tread such that the dial indicator is perpendicular to the tire tread surface.
7. Slowly rotate the tire and wheel assembly one complete revolution in order to find the low spot.
8. Set the GE-8001  Dial Indicator Set to zero at the low spot.
9. Slowly rotate the tire and wheel assembly one more complete revolution and measure the total amount of radial runout.

   Specification 

   Maximum tire and wheel assembly radial runout - measured on-vehicle: 1.52 mm (0.060 in)

10. Courtesy of GENERAL MOTORS COMPANY

    Position the GE-8001  Dial Indicator Set (1) on a smooth portion of the tire sidewall, as close to the tread as possible, such that the dial indicator is perpendicular to the tire sidewall surface.

11. Slowly rotate the tire and wheel assembly one complete revolution in order to find the low spot. Ignore any jumps or dips due to sidewall splices.
12. Set the GE-8001  Dial Indicator Set (1) to zero at the low spot.
13. Slowly rotate the tire and wheel assembly one more complete revolution and measure the total amount of lateral runout. Ignore any jumps or dips due to sidewall splices and attain an average runout measurement.

    Specification 

    Maximum tire and wheel assembly lateral runout - measured on-vehicle: 1.52 mm (0.060 in)

14. Repeat steps 4 through 12 until all of the tire and wheel assembly radial and lateral runout measurements have been taken.
15. Lower the vehicle.