The Ultimate Guide to Subaru Wheel Bearing Replacement: Diagnose, Repair, and Maintenance

A faulty wheel bearing in your Subaru can compromise its handling, braking performance, and overall safety. So, it's crucial to detect and replace them promptly. This comprehensive guide will equip you with all the knowledge you need to tackle a Subaru wheel bearing replacement confidently.

Symptoms: When to Suspect a Failing Wheel Bearing

Recognizing the signs of a failing wheel bearing is the first step towards timely repair:

• Humming or grinding noise: A persistent humming or grinding sound while driving, especially when turning or accelerating, is a telltale sign.
• Abnormal tire wear: Uneven or excessive wear on one side of a tire can indicate a problem with the wheel bearing on that side.
• Loose or shaky steering wheel: A worn wheel bearing can cause the steering wheel to feel loose or shaky while driving.
• Wobbling or vibration: If your wheels wobble or vibrate excessively at higher speeds, it could be a symptom of a failing wheel bearing.

Diagnosis: Confirming the Culprit

• Visual inspection: Carefully inspect the wheel bearing for any signs of wear, damage, or leakage.
• Jacking and shaking: Jack up the car and grab the tire at 12 and 6 o'clock. Shake it vigorously. Excessive play or a grinding sensation confirms a faulty bearing.
• Stethoscope or mechanic's ear: Use a stethoscope or mechanic's ear to listen for unusual noises coming from the wheel bearing while spinning the wheel.

Tools and Equipment Required

For a successful Subaru wheel bearing replacement, you'll need:

• New wheel bearing assembly
• Socket wrench with appropriate sockets
• Torque wrench
• Wheel bearing press (optional, recommended for easier removal and installation)
• Hammer
• Pry bar
• Safety glasses
• Gloves

Step-by-Step Replacement Guide

1. Safety First: Park your Subaru on a flat, stable surface and engage the parking brake. Place wheel chocks behind the opposite wheels for added safety.

2. Remove the Wheel: Loosen the lug nuts on the affected wheel using a socket wrench. Jack up the car and fully remove the lug nuts and wheel.

3. Separate the Brake Caliper: Remove the brake caliper bolts and gently lift the caliper off the rotor without disconnecting the brake line. Secure the caliper using a bungee cord or wire to prevent it from hanging.

4. Remove the Rotor: Remove the rotor bolts and pull the rotor straight off the wheel hub.

5. Remove the Old Bearing: Use a wheel bearing press or a hammer and chisel to carefully remove the old bearing from the wheel hub.

6. Clean the Bearing Surface: Clean the wheel hub and spindle thoroughly to remove any rust or debris.

7. Install the New Bearing: Apply a small amount of grease to the new bearing and press it into the wheel hub using a wheel bearing press or a hammer and socket.

8. Reassemble the Hub: Reinstall the rotor and brake caliper, tightening the bolts to the manufacturer's specifications.

9. Remount the Wheel: Replace the wheel and hand-tighten the lug nuts. Lower the car and fully tighten the lug nuts using a torque wrench.

10. Test Drive: Take your Subaru for a test drive and listen for any unusual noises or vibrations. Ensure that the steering and braking feel smooth and responsive.

Maintenance and Prevention: Extending Wheel Bearing Life

• Regular inspections: Check your wheel bearings for any signs of wear or damage during routine maintenance.
• Proper lubrication: Use high-quality grease specifically designed for wheel bearings during replacement and periodic maintenance.
• Avoid overloading: Exceeding the recommended weight limit for your Subaru can put excessive strain on the wheel bearings.
• Water and road hazards: Protect your wheel bearings from water damage by avoiding deep puddles and driving through rough terrain carefully.

Stories to Ponder: Lessons Learned

• The Humming Highway: A motorist ignored a persistent humming sound from their Subaru for too long. When they finally took it to the mechanic, the wheel bearing had completely failed, causing the wheel to detach while driving, resulting in a costly accident.

  

• The Overloaded Odyssey: A family on a road trip packed their Subaru to the brim with luggage and passengers. The excessive weight put unbearable stress on the wheel bearings, leading to a blowout on the highway and a harrowing escape.

• The Puddle Predicament: A driver drove their Subaru through a deep puddle without hesitation. The water damaged the wheel bearings, causing them to seize up and the wheel to lock, resulting in a sudden stop on a busy road.

Lesson: Timely attention to wheel bearing issues, proper maintenance, and avoiding overloading can save you from potentially dangerous and expensive situations.

Tips and Tricks

• Use a lubricant spray: Spray a penetrating lubricant onto the rusted or seized bolts before attempting to remove them.
• Protect the brake caliper: Avoid overtightening the brake caliper bolts and always use a bungee cord or wire to secure it when not in use.
• Check the wheel alignment: After replacing a wheel bearing, it's advisable to have the wheel alignment checked by a professional to ensure optimal handling and tire wear.

Common Mistakes to Avoid

• Ignoring symptoms: Prolonged neglect of wheel bearing problems can lead to catastrophic failure and severe damage.
• Overtightening bolts: Excessive force when tightening bolts can damage the threads and compromise the integrity of the assembly.
• Using the wrong bearing: Ensure you replace the old bearing with the correct type and size specifically designed for your Subaru model and year.

Why Wheel Bearing Replacement Matters

• Safety: Faulty wheel bearings can affect steering and braking performance, increasing the risk of accidents.
• Tire longevity: Worn wheel bearings can cause premature and uneven tire wear, leading to reduced tire life and increased replacement costs.
• Fuel efficiency: Proper wheel alignment after bearing replacement can improve fuel efficiency by reducing rolling resistance.

Benefits of Timely Replacement

• Enhanced stability and control: New wheel bearings provide optimal support for the wheels, improving handling and stability, especially during cornering.
• Reduced noise and vibration: Replacing worn bearings eliminates humming, grinding, and wobbling noises, resulting in a quieter and more comfortable ride.
• Extended lifespan: Properly maintained wheel bearings can significantly extend the lifespan of your Subaru's suspension system.

FAQs

1. Q: How often should I replace wheel bearings in my Subaru?
   - A: The recommended replacement interval for wheel bearings varies depending on driving conditions and driving habits. Generally, it's advisable to inspect your bearings every 50,000-75,000 miles and replace them as needed.

2. Q: Can I replace wheel bearings myself?
   - A: Replacing wheel bearings can be a complex task that requires specialized tools and technical knowledge. If you're not confident in your mechanical abilities, it's recommended to consult a qualified mechanic.

3. Q: What's the approximate cost of replacing wheel bearings?
   - A: The cost of replacing wheel bearings depends on the make and model of your Subaru, as well as the labor rates in your area. On average, the cost ranges from $250 to $700 per bearing, including parts and labor.

Conclusion

A Subaru wheel bearing replacement may seem daunting, but by following these instructions and adhering to the recommended maintenance practices, you can ensure the safety and longevity of your vehicle. Remember, timely attention to wheel bearing issues can save you money, prevent accidents, and keep your Subaru running smoothly for miles to come.

Effective Strategies for Subaru Wheel Bearing Replacement:

• Choose high-quality replacement bearings designed specifically for your Subaru model.
• Use the appropriate tools and follow the manufacturer's instructions for proper installation.
• Lubricate all moving parts with a high-quality grease.
• Check the wheel alignment after bearing replacement to ensure optimal handling and tire wear.
• Monitor your wheel bearings regularly for any signs of wear or damage.