This article aims to solve three main problems for Subaru Forester owners concerned about their wheel bearings: identifying the symptoms of a failing wheel bearing, understanding the replacement process, and offering advice on choosing the right replacement parts. We’ll delve into practical advice and even share some personal experiences that you won’t find in your owner’s manual.
A wheel bearing is a crucial component that allows your Subaru Forester’s wheels to rotate smoothly. Located inside the wheel hub, it reduces friction, enabling comfortable and efficient driving. Over time, these bearings can wear out due to constant stress, exposure to road debris, and general aging. Recognizing the signs of a failing wheel bearing early can save you from more costly repairs down the line.
The most common symptom is a humming or roaring noise that changes with vehicle speed. This noise often gets louder as you accelerate and may diminish or disappear when you turn in one direction or the other. This is because turning shifts the load on the bearing. Here are some other indicators to watch out for:
- Vibration: You might feel a vibration in the steering wheel or floorboard, especially at higher speeds.
- Play in the wheel: If you lift the vehicle and try to wiggle the wheel, you might notice excessive play, indicating a worn bearing.
- Uneven tire wear: A failing wheel bearing can cause the tire to wear unevenly due to the instability it creates.
- ABS light: In some cases, a failing wheel bearing can interfere with the Anti-lock Braking System (ABS) sensor, causing the ABS light to illuminate.
- Grinding noise: In severe cases, you might hear a grinding noise, indicating significant damage to the bearing.
Before you start ordering parts, double-check that the noise you’re hearing is actually from a wheel bearing. Tire noise can sometimes mimic the sound of a failing bearing. Rotate your tires and see if the noise changes or disappears. Also, inspect your tires for cupping or uneven wear, which can contribute to noise. A mechanic’s stethoscope can be useful for pinpointing the exact location of the noise.
Replacing a wheel bearing on your Subaru Forester is a job that many experienced DIYers can tackle. However, it’s crucial to have the right tools and a good understanding of automotive mechanics. Here’s a simplified overview of the process:
- Loosen the lug nuts: Before lifting the vehicle, loosen the lug nuts on the wheel you’ll be working on.
- Raise and support the vehicle: Use a jack to lift the vehicle and secure it with jack stands. Never work under a vehicle supported only by a jack.
- Remove the wheel: Remove the lug nuts and take off the wheel.
- Remove brake components: You’ll typically need to remove the brake caliper and rotor to access the wheel hub.
- Remove the hub: This can be the trickiest part. Some hubs are bolted on, while others are pressed in. You may need a slide hammer or a hydraulic press to remove the hub.
- Remove the old bearing: If the bearing is still in the hub, you’ll need a press to remove it.
- Install the new bearing: Press the new bearing into the hub, ensuring it’s properly seated.
- Reinstall the hub: Reinstall the hub onto the vehicle.
- Reassemble the brake components: Reinstall the brake rotor and caliper.
- Reinstall the wheel: Put the wheel back on and tighten the lug nuts.
- Lower the vehicle: Lower the vehicle and torque the lug nuts to the manufacturer’s specifications.
Important Note: Always consult your vehicle’s repair manual for specific instructions and torque specifications.
When it comes to replacement parts, you have two main options: Original Equipment Manufacturer (OEM) parts and aftermarket parts. OEM parts are made by the same manufacturer that supplied the original parts for your vehicle. They’re generally more expensive but are guaranteed to fit and perform as intended. Aftermarket parts are made by other companies and can vary in quality and price. Here’s a quick comparison:
| Feature | OEM Parts | Aftermarket Parts |
|---|---|---|
| Price | Higher | Lower |
| Quality | Generally Higher | Variable |
| Fitment | Guaranteed | May require modification |
| Warranty | Often Included | Varies by manufacturer |
| Source | Subaru Dealership | Auto Parts Stores, Online Retailers |
My recommendation: For critical components like wheel bearings, I generally prefer OEM parts for peace of mind. However, reputable aftermarket brands like Timken or SKF can also be good choices if you’re on a budget. Do your research and read reviews before making a decision.
I once made the mistake of only replacing the wheel bearing on my Forester without inspecting the hub. A few months later, the new bearing failed prematurely. Come to find out the hub had some corrosion inside. Always inspect the hub for wear, corrosion, or damage when replacing a wheel bearing. If the hub is damaged, replace it along with the bearing to ensure proper fit and longevity.
One of the biggest challenges when replacing a wheel bearing, especially on older vehicles, is dealing with rusted or seized components. Penetrating oil is your best friend in these situations. Apply it liberally to any rusted bolts or connections and let it soak for several hours (or even overnight) before attempting to remove them. You can also use heat from a torch to help loosen stubborn components, but be careful not to damage any nearby parts.
While many DIYers can handle a wheel bearing replacement, there are times when it’s best to seek professional help. If you’re not comfortable working on your vehicle’s brakes or suspension, or if you don’t have the necessary tools, it’s best to take it to a qualified mechanic. Also, if you encounter any unexpected problems during the replacement process, don’t hesitate to seek professional assistance. A mechanic can diagnose the issue and get your vehicle back on the road safely.
Proper torque is essential when reassembling suspension components. Under-torquing can lead to loose connections and premature wear, while over-torquing can damage the bolts or surrounding parts. Always consult your vehicle’s repair manual for the correct torque specifications and use a torque wrench to ensure accurate tightening. It’s also wise to re-torque the lug nuts after driving a short distance (approximately 50-100 miles) after the wheel bearing replacement.
Welcome to our hub for all things bearings! Whether you're an engineer, a student, or simply curious, we provide in-depth knowledge, the latest news, and insightful articles covering a wide range of bearing types, applications, and industry trends. Explore our resources to enhance your understanding and stay informed about the world of bearings.
