Drivetrain - L/H Front Wheel Bearing Squeak/Squeal Noise
NUMBER: 03-62-09DATE: 02/04/09
APPLICABILITY:
2005-07MY Legacy/Outback
SUBJECT:
Left Front Wheel Bearing, Squeak/Squeal Type Noise
Introduction
If you encounter a squeaking/squealing type noise coming from the left front wheel bearing area it may be from the lip of the wheel bearing seal contacting the flange of the wheel bearing housing.
The seals have a spiral manufacturing surface and due to the wheel rotation on the left side, it creates a low pressure causing the lip of the seal to stick to the flange. When the seal lip sticks, it vibrates creating the noise. Over time the spiral surface will become smooth eliminating the condition. In the interim, the following procedure should be used to eliminate the noise.
Note:
Do not use any type of grease or any other method to eliminate the noise. Adding grease will only worsen the condition.
Repair Procedure/Service Information
Special Tool
For illustration purposes, the bearing assembly was removed. The actual repair is performed on car. The special tool is inserted to separate the seal lip from the flange.
(1) Remove the left front wheel.
(2) Remove the brake caliper.
(3) Remove the brake rotor.
(4) Using a clean paper towel folded, clean any dirt that has accumulated between the wheel bearing housing and hub. Change the towel as needed and make sure the entire circumference has been cleaned.
Note:
If the special tool is not available, a 0.5mm thick feeler gauge may be used inserted no more than 8mm. Extreme caution must be used, inserting further than 8mm can scratch the bearing. If possible, try to use a suitable plastic tool.
(5) Insert the tip of the special tool into the seal lip until the step portion of the tool hits the bearing outer race.
(6) With the special tool inserted, rotate the hub and special tool together 90° degrees (12:00 to 3:00 position) going back and forth several times insuring that the seal lip is separated from the flange. Remove the tool and wipe off any dirt or grease on the tool.
(7) Repeat the procedure 3 additional times, 90� at a time (3:00 to 6:00, 6:00 to 9:00, and 9:00 to 12:00) insuring that the procedure is performed on the entire circumference.
(8) Reinstall brake caliper, rotor and wheel.
(9) Road test vehicle to confirm noise is gone.
Warranty/Claim Information