Front Knuckle/Hub Inspection

WARNING: This page is about a different car, the 2003 Subaru Impreza and 2002 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the rattle of bearing, give the tires a shake with grasping both the upper and lower sides of the tire. See Fig 1. And also inspect to rotate the wheel smoothly.
Inspect the lean of axis direction using a dial gauge. See Fig 2. Replace the hub bearing if the load range exceed the limit of .002" (.05 mm).
CAUTION: If bearing is faulty, replace it as the bearing set. Be sure to replace oil seal at every overhaul.
Inspect the removed parts for wear and damage. See Fig 3. If defective, replace with new ones.

Fig 1: Inspecting Rattle Of Bearing

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Inspecting Axis With Dial Gauge

Courtesy of SUBARU OF AMERICA, INC.

Fig 3: Checking Parts For Wear & Damage

Courtesy of SUBARU OF AMERICA, INC.