Tools Required
J 8001 Dial Indicator
Important:
| • | The vehicle must rest on a level surface. |
| • | The vehicle must be stable. Do not rock the vehicle on the jack
stands. |
| • | The upper control arm bumper must not contact the frame. |
- Raise and support the vehicle with safety stands. Refer to
Lifting and Jacking the Vehicle
in General Information.
- Support the lower control arm with a jack stand, as far outboard
as possible, near the lower ball joint.
Important: If a seal is cut or torn, replace the ball joint.
- Wipe the ball joints clean. Check the seals for cuts or tears.
- Check the wheel bearings for looseness. If looseness in the wheel
bearings is present, refer to
Wheel Bearings Diagnosis
.
- Check the ball joints for horizontal looseness.
| 5.1. | Position the J 8001
dial indicator against the lowest outboard point on the wheel rim. |
| 5.2. | Rock the wheel in and out while reading the dial indicator. This
shows horizontal looseness in both joints. |
| 5.3. | The dial indicator reading should be no more than 3.18 mm
(0.125 in). If the reading is too high, check the lower ball joints
for vertical looseness. |
- Check the lower ball joints
for wear and for vertical looseness using the following procedure:
| 6.1. | Inspect by sight the lower ball joint for wear. The position of
the housing into which the grease fitting is threaded indicates wear. This
round housing projects 1.27 mm (0.050 in) beyond the surface
of the lower ball joint cover on a new ball joint. Under normal wear, the
surface of the lower ball joint housing retreats inward very slowly. |
| 6.2. | First observe, then scrape a scale, a screwdriver, or a fingernail
across the cover. If the round housing is flush with or inside of the cover
surface, replace the lower ball joint. Refer to
Lower Control Arm Ball Joint Replacement
in Front Suspension. |
- Place a J 8001
dial indicator (1) against the spindle
in order to show vertical movement.
- Pry between the lower
control arm (2) and the outer bearing race (1) while reading the dial indicator.
This shows vertical looseness in the ball joints. The lower ball joint
is not preloaded and may show some looseness.
- If the dial indicator reading is more than 3.18 mm (0.125 in),
replace the lower ball joint. Refer to
Lower Control Arm Ball Joint Replacement
in Front Suspension.
- If the lower ball joint is within specifications, and there is
too much horizontal looseness, check the upper ball joint for wear.
