Drivetrain - Front Wheel Bearing Noise
SI B 31 01 05Body Equipment
March 2006
Technical Service
This Service Information bulletin supersedes Service Information B31 01 05 dated May 2005.
[NEW] designates changes to this revision
SUBJECT
Front Wheel Bearing Noise
MODEL
[NEW] E53 (X5)
SITUATION
Metallic knocking noise heard coming from the front axle area or through the floor panel.
CAUSE
The wheel bearing seat comes loose in the swivel bearing.
[NEW] CORRECTION
In case of a customer complaint, verify the wheel bearing noise. Once the wheel bearing noise has been confirmed and localized of where it comes from left or right side), replace only the front wheel carrier assembly of the noisy side.
PROCEDURE
1. Confirm the wheel bearing noise:
a. Bring the front axle components to normal operating temperature by driving and braking repeatedly for about 10 minutes.
b. Drive a complete circle with the steering wheel in full lock position to produce a high lateral acceleration.
c. Stop the vehicle and, with the vehicle in a stationary position, turn the steering wheel in the opposite direction for three turns. Do not turn to the full lock position.
d. Engage reverse gear and pull away abruptly. Listen for a loud, brief and distinct metallic knocking noise to confirm the wheel bearing noise.
e. This Service Information does not apply if a rattleing or chattering noise is heard.
2. The wheel bearing noise may be resonated to the transfer case via output shafts. Replacing the output shafts or the transfer case will not remedy the situation.
3. [NEW] Replace the wheel carrier/swivel bearing per Repair Instructions RA 31 21 090.
4. Replace the front wheel bearing and drive flange per Repair Instructions RA 31 211 80.
NOTES
1. Ensure that the bearing press fit area is dean and free of oil and grease.
2. Coat wheel bearing seat in the swivel bearing over 50% of its length with either Loctite 648 (3 hours curing time at 70°F) or Loctite 638 (6 hours curing time at 70°F).
3. It is important to observe the curing time and the ambient temperature. It may take up to 24 hours curing time if either Loctite is applied at 40°F.
4. During curing time, do not move the vehicle or use brakes.
[NEW] PARTS INFORMATION
WARRANTY INFORMATION
Information only.
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