The Ultimate Guide to Subaru Wheel Bearing Replacement

Introduction

Wheel bearings are essential components of your Subaru's suspension system, allowing your wheels to rotate smoothly and safely. Over time, however, wheel bearings can wear out or fail, leading to a range of problems. This guide will provide you with everything you need to know about Subaru wheel bearing replacement, including why it matters, how to recognize signs of failure, and step-by-step instructions for performing the replacement.

Why Wheel Bearing Replacement Matters

Wheel bearings play a critical role in the safety and performance of your Subaru. They:

• Reduce friction: Wheel bearings minimize friction between the wheel and the axle, ensuring smooth rotation.
• Support the vehicle's weight: Wheel bearings bear the weight of the vehicle and distribute it evenly across the suspension system.
• Allow for steering: Wheel bearings enable the wheels to turn smoothly, allowing you to steer your Subaru safely and effectively.

Signs of Wheel Bearing Failure

Recognizing the signs of wheel bearing failure is crucial to prevent further damage and ensure your safety. Common symptoms include:

• Grinding or humming noises: A grinding or humming sound while driving, especially when turning or braking, often indicates worn-out wheel bearings.
• Vibration in the steering wheel or seat: Excessive vibration in the steering wheel or seat can be a sign of a failing wheel bearing.
• Wobbling or loose wheels: Wheel bearings that are loose or damaged can cause the wheels to wobble or feel loose when driving.
• Premature tire wear: Uneven or excessive tire wear can sometimes be caused by failing wheel bearings.

Step-by-Step Wheel Bearing Replacement

Replacing a Subaru wheel bearing is a relatively complex task that requires specialized tools and knowledge. However, with the right preparation and guidance, it is possible to perform the replacement yourself.

Tools and Materials You'll Need:

• New wheel bearing (specific to your Subaru model)
• Wheel bearing hub assembly (if necessary)
• Puller and installer tools (for removing and installing the bearing)
• Socket set
• Wrench set
• Hammer
• Pry bar
• Lubricant

Safety Precautions:

• Wear safety glasses and gloves.
• Park your Subaru on a level surface and engage the parking brake.
• Chock the wheels to prevent the vehicle from rolling.
• Allow the brakes to cool before beginning work.

Step-by-Step Instructions:

1. Remove the Wheel:

• Loosen the lug nuts on the affected wheel using a socket wrench.
• Raise the vehicle using a jack and support it with jack stands.
• Remove the lug nuts and take off the wheel.

2. Remove the Brake Caliper and Rotor:

• Remove the caliper mounting bolts using a wrench.
• Lift the caliper off the rotor and support it with a bungee cord or wire.
• Remove the rotor by pulling it straight off the hub.

3. Remove the Wheel Bearing:

• Use a puller tool to remove the wheel bearing from the hub assembly.
• If the bearing is stuck, gently tap it with a hammer while pulling.
• Disconnect the ABS sensor wire (if applicable).

4. Replace the Wheel Bearing:

• Lubricate the new wheel bearing with bearing grease.
• Install the bearing into the hub assembly using an installer tool.
• Tighten the bearing nut to the specified torque using a torque wrench.

5. Reassemble the Components:

• Reinstall the rotor onto the hub.
• Install the brake caliper and tighten the mounting bolts.
• Connect the ABS sensor wire (if applicable).

6. Reinstall the Wheel:

• Place the wheel onto the hub and tighten the lug nuts by hand.
• Lower the vehicle and fully tighten the lug nuts using a torque wrench.

7. Test Drive:

• Start your Subaru and take it for a test drive.
• Listen for any unusual noises or vibrations.
• Check for smooth steering and braking.

Tips and Tricks

• Use high-quality wheel bearings and tools for best results.
• Lubricate all moving parts with bearing grease.
• Tighten the bearing nut to the specified torque to prevent premature failure.
• Replace both wheel bearings on the same axle if one fails.
• If you are not comfortable performing the replacement yourself, seek professional assistance from a qualified mechanic.

Benefits of Replacing Wheel Bearings

Replacing worn or damaged wheel bearings offers numerous benefits, including:

• Improved safety: Proper wheel bearing operation ensures smooth steering and braking, enhancing driving safety.
• Reduced noise and vibration: New wheel bearings eliminate grinding or humming noises and minimize vibration in the steering wheel and seat.
• Extended tire life: Wheel bearings that are in good condition prevent uneven tire wear and extend the lifespan of your tires.
• Enhanced handling and performance: Properly functioning wheel bearings contribute to better handling and overall driving performance.

Pros and Cons of Wheel Bearing Replacement

Pros:

• Improves safety and performance: Replacing wheel bearings ensures optimal steering, braking, and handling.
• Extends tire life: Proper wheel bearing operation prevents uneven tire wear.
• Relatively affordable repair: Compared to other major automotive repairs, wheel bearing replacement is typically more cost-effective.

Cons:

• Complex task: Wheel bearing replacement requires specialized tools and knowledge.
• Time-consuming: The replacement process can take several hours to complete.
• Requires specialized tools: You'll need a puller and installer tool to replace the wheel bearing.

FAQs

1. How often should I replace my wheel bearings?

• The frequency of wheel bearing replacement depends on factors such as driving conditions and vehicle usage. Generally, wheel bearings should be inspected every 50,000 to 100,000 miles and replaced as needed.

2. Can I replace wheel bearings myself?

• While it is possible to replace wheel bearings yourself, it requires specialized tools and knowledge. If you are not comfortable performing the replacement, it is recommended to seek professional assistance.

3. How much does it cost to replace wheel bearings?

• The cost of wheel bearing replacement varies depending on the Subaru model, parts used, and labor rates. On average, you can expect to pay between $200 and $800 per wheel.

4. What are the consequences of driving with worn wheel bearings?

• Driving with worn wheel bearings can lead to various problems, including increased noise, vibration, uneven tire wear, and potential safety hazards such as wheel lockup.

5. Can I drive short distances with worn wheel bearings?

• In some cases, you may be able to drive short distances with worn wheel bearings. However, it is important to address the issue promptly to prevent further damage and ensure your safety.

6. What are some signs that I need to replace my wheel bearings?

• Signs of wheel bearing failure include grinding or humming noises, vibration in the steering wheel or seat, wobbling or loose wheels, and premature tire wear.

7. Can I just repack my wheel bearings instead of replacing them?

• Repacking wheel bearings is not a long-term solution and is only recommended as a temporary measure. Replacing the entire wheel bearing is the most effective way to address bearing failure.

8. What type of lubricant should I use for wheel bearings?

• Always use a high-quality bearing grease specifically designed for wheel bearings.