2018 Ford Explorer Front Wheel Bearing – Diagnose, Replace
Hearing an unusual growl or hum from your 2018 Ford Explorer? It might be a failing front wheel bearing, a critical component for your vehicle’s safety and ride quality. This comprehensive guide will walk you through the symptoms, diagnostic process, and the step-by-step procedure to replace your front wheel bearing, empowering you to tackle this common repair with confidence.
Experiencing a persistent hum or grinding sound from the front of your 2018 Ford Explorer can be unsettling and often points to a worn-out front wheel bearing. Addressing this issue promptly is crucial for maintaining your vehicle’s safety, handling, and preventing further, more costly damage. This guide provides an in-depth look at diagnosing and replacing the 2018 Ford Explorer front wheel bearing, ensuring you have the knowledge to get your SUV running smoothly again.
That tell-tale growl or rumble from your Ford Explorer’s front end isn’t just annoying; it’s a clear signal that something critical needs attention. A failing wheel bearing can compromise steering, braking, and overall vehicle stability, turning a simple drive into a potentially hazardous situation. Ignoring these symptoms can lead to catastrophic failure, leaving you stranded or, worse, in an unsafe driving scenario.
Fortunately, with the right tools, knowledge, and a commitment to safety, replacing a front wheel bearing on your 2018 Explorer is a manageable DIY project for many home mechanics. This article will equip you with expert insights, practical steps, and safety precautions, guiding you from initial diagnosis to a successful replacement. Get ready to restore your Explorer’s quiet ride and reliable performance.
Understanding Your 2018 Ford Explorer Front Wheel Bearing
The wheel bearing is a vital component that allows your wheels to spin freely with minimal friction. In your 2018 Ford Explorer, the front wheel bearings are typically integrated into a single hub assembly. This means you usually replace the entire hub, not just the bearing itself.
These assemblies are designed to last, but constant exposure to road grit, moisture, hard impacts, and general wear and tear can cause them to fail. Recognizing the early signs of a failing bearing can save you from more significant repairs down the line.
What Does a Healthy Wheel Bearing Do?
A properly functioning wheel bearing ensures smooth rotation of the wheel around the axle. It minimizes friction and supports the vehicle’s weight, allowing for precise steering and consistent braking performance.
When healthy, you shouldn’t hear any noise from the wheel bearing area. The ride should be quiet and stable, especially at highway speeds.
Common Causes of Wheel Bearing Failure
Several factors can contribute to the premature failure of an Explorer’s front wheel bearing. These include impacts from potholes or curbs, prolonged exposure to water (especially if the seals are compromised), and even aggressive driving styles that put excessive stress on the suspension components.
Manufacturing defects are rare but can also lead to early failure. Often, it’s a combination of these stressors that eventually wears out the internal components.
Diagnosing a Failing Front Wheel Bearing in Your Explorer
Identifying a failing wheel bearing early is key. The symptoms are often distinct, but can sometimes be mistaken for other issues like tire problems or CV joint wear. A careful diagnosis is essential to avoid unnecessary repairs.
Listen for the Tell-Tale Noises
The most common symptom of a bad front wheel bearing is noise. You might hear a:
- Growling or Humming Sound: This noise often increases with vehicle speed. It might change in pitch or intensity when turning the steering wheel, usually getting louder when turning towards the side of the bad bearing (e.g., turning left makes a right bearing louder).
- Whirring or Grinding Sound: As the bearing deteriorates further, the internal components wear down, leading to a harsher grinding noise. This indicates significant damage.
Pay close attention to when and how the noise changes. This can help pinpoint which side of the vehicle the problem is on.
Feel for Vibrations and Loose Steering
Beyond noise, a failing bearing can cause noticeable vibrations. You might feel these in the:
- Steering Wheel: A shaky steering wheel, especially at higher speeds, can be a symptom.
- Floorboard: Vibrations might also be felt through the floor of the vehicle.
In severe cases, you might also experience a slight looseness in the steering, or the vehicle might pull slightly to one side. This is because the wheel isn’t rotating as smoothly or as rigidly as it should.
Performing a Garage Diagnosis
To confirm your suspicions, you’ll need to safely lift the front of your Explorer. This allows you to check for play and listen more closely.
- Lift the Vehicle: Safely lift the front of your 2018 Ford Explorer using a jack and secure it with sturdy jack stands on a level surface. Never work under a vehicle supported only by a jack.
- Check for Wheel Play: With the wheel off the ground, firmly grasp the tire at the 12 and 6 o’clock positions. Try to rock the wheel in and out. Excessive play or clunking indicates a worn wheel bearing or possibly a ball joint.
- Rotate and Listen: Spin the wheel by hand while listening for any grinding, roughness, or resistance. You might even feel a slight grittiness as you turn the wheel.
If you detect significant play or a rough rotation, it’s highly likely that the 2018 Ford Explorer front wheel bearing needs replacement.
Tools and Parts You’ll Need for the 2018 Ford Explorer Front Wheel Bearing Replacement
Before you begin, gather all necessary tools and parts. Having everything on hand will make the job smoother and safer. This is not a job to start without proper preparation.
Essential Tools
- Floor jack and sturdy jack stands
- Wheel chocks
- Lug nut wrench or impact gun with appropriate socket (usually 21mm)
- Breaker bar
- Torque wrench (capable of up to 250 ft-lbs for axle nut)
- Socket set (various sizes, including 10mm, 13mm, 15mm, 18mm, 21mm, 30mm or 32mm for axle nut)
- Wrenches (open-end and box-end, matching socket sizes)
- Pry bar or large screwdriver
- Hammer or mallet
- Flathead screwdriver (for clips)
- Wire brush (for cleaning)
- Penetrating oil (e.g., WD-40, PB Blaster)
- Brake cleaner
- Gloves and safety glasses
Required Parts
- New front wheel hub assembly for a 2018 Ford Explorer (ensure it’s for your specific trim level, e.g., FWD or AWD)
- Replacement cotter pin (for axle nut, if applicable)
- Optional: New axle nut (some manufacturers recommend replacing it)
- Optional: Anti-seize lubricant (for threads)
Always purchase a high-quality replacement hub assembly. Cheap bearings can fail prematurely, leading to repeated work and potential safety risks. Check reviews and ensure compatibility with your specific vehicle.
Step-by-Step: Replacing the 2018 Ford Explorer Front Wheel Bearing
This procedure involves working with critical suspension and brake components. Take your time, follow each step carefully, and prioritize safety above all else. If you’re unsure at any point, consult a licensed mechanic.
Step 1: Prepare the Vehicle for Service
Park your Explorer on a flat, level surface. Engage the parking brake. Chock the rear wheels to prevent any movement. Loosen the front lug nuts on the wheel you’ll be working on, but do not remove them yet.
Using your floor jack, lift the front of the vehicle and position the jack stands securely under the frame rails. Lower the vehicle onto the jack stands. Remove the lug nuts and the wheel.
Step 2: Access the Axle Nut
You’ll need to remove the dust cap from the center of the hub. Use a flathead screwdriver or pry bar. Then, remove the cotter pin (if present) and the retaining cap from the axle nut. Using your breaker bar and the appropriate large socket (usually 30mm or 32mm), loosen the axle nut. This nut is often very tight, so significant force may be required.
Do not fully remove the axle nut yet; just break it loose. This allows the axle shaft to move more freely later.
Step 3: Disconnect Brake Components
First, remove the two bolts holding the brake caliper to the caliper bracket. These are usually 13mm or 15mm. Gently slide the caliper off the rotor and secure it out of the way using a bungee cord or wire. Do not let it hang by the brake hose, as this can damage the hose.
Next, remove the two bolts that hold the caliper bracket to the steering knuckle. These are typically 18mm or 21mm. Once removed, the brake rotor should slide off the hub assembly. If it’s stuck, a few taps with a rubber mallet on the backside can help.
Step 4: Remove the ABS Sensor and Hub Mounting Bolts
Locate the ABS sensor wire. It’s usually routed along the brake hose. Disconnect the electrical connector and carefully unclip the wire from its mounting points. Remove the bolt holding the sensor itself to the steering knuckle (often 10mm). Gently pull the sensor straight out; be careful not to damage it.
Now, look at the back of the steering knuckle. You’ll see three or four bolts that hold the front wheel hub assembly to the knuckle. These are typically 15mm or 18mm. Use a wrench or socket to remove these bolts. They can be tight and sometimes rusty, so penetrating oil might be helpful.
Step 5: Separate the Hub Assembly
With the hub mounting bolts removed and the axle nut loose, you can now separate the old hub assembly from the steering knuckle. Sometimes, a few firm taps with a hammer on the face of the hub (where the wheel mounts) can help break it free.
If it’s stubborn, you might need to use a pry bar between the knuckle and the hub. Be careful not to damage the steering knuckle or the axle shaft. Once loose, carefully slide the hub assembly off the axle shaft and out of the steering knuckle.
Step 6: Install the New Hub Assembly
Before installing the new hub, clean the mating surface on the steering knuckle thoroughly with a wire brush. Remove any rust or debris. Apply a thin layer of anti-seize compound to the mating surface if desired.
Carefully slide the new 2018 Ford Explorer front wheel bearing hub assembly onto the axle shaft and into the steering knuckle. Ensure the splines on the axle shaft align with the splines in the hub. Push it in fully until it sits flush against the knuckle.
Install the new hub mounting bolts from the rear of the steering knuckle. Tighten them by hand, then use your torque wrench to tighten them to the manufacturer’s specifications (refer to your vehicle’s service manual, typically around 100-120 ft-lbs). Work in a star pattern if applicable.
Step 7: Reinstall Components and Torque
Reinstall the ABS sensor, ensuring it’s seated correctly and its bolt is tightened. Reconnect the electrical connector and secure the wire.
Slide the brake rotor back onto the new hub. Reinstall the brake caliper bracket bolts and torque them to spec (typically 120-150 ft-lbs). Reinstall the brake caliper, ensuring the pads are seated correctly, and torque its bolts to spec (usually 25-35 ft-lbs).
Finally, tighten the axle nut. This nut requires significant torque, often exceeding 200 ft-lbs (consult your manual for the exact specification, usually 200-250 ft-lbs). If your vehicle uses a new cotter pin, install it through the axle nut and bend its ends to secure it. Replace the dust cap.
Step 8: Final Checks and Road Test
Reinstall the wheel and tighten the lug nuts by hand. Lower the vehicle off the jack stands. With the vehicle on the ground, torque the lug nuts to factory specifications (typically 100 ft-lbs for a 2018 Ford Explorer) in a star pattern.
Pump the brake pedal several times before driving to restore pressure to the brake caliper. Take the vehicle for a test drive. Listen for any unusual noises and pay attention to steering feel and braking performance. The growling or humming noise should be gone, and the ride should feel smooth and stable.
Post-Replacement Checks and Essential Safety Tips
Completing a wheel bearing replacement is a significant achievement, but the job isn’t truly done until you’ve performed thorough post-installation checks. Safety must remain your top priority.
Double-Check All Fasteners
After your initial test drive, it’s a good practice to re-check the torque on all bolts you loosened or removed, especially the lug nuts and the axle nut. Sometimes, components can settle, and a slight re-tightening might be necessary. This ensures everything remains secure and prevents potential issues.
Confirm the ABS sensor wire is fully clipped and away from any moving parts, preventing chafing or damage.
Monitor for New Noises or Vibrations
In the days following the repair, pay close attention to your Explorer’s behavior. Listen for any new or lingering noises, and feel for vibrations. While rare, a faulty new part or an installation error could manifest new symptoms.
If you hear a different noise or feel an odd vibration, pull over safely and inspect the area again. It’s better to catch a small issue early than to let it escalate.
Professional Alignment Recommendation
While replacing a wheel hub assembly doesn’t directly alter steering alignment settings, any work on suspension components can sometimes subtly affect it. It’s a wise precaution to have a professional alignment performed, especially if you notice any pulling or uneven tire wear after the repair.
This ensures your tires wear evenly and your steering remains precise, extending the life of your tires and other suspension components.
When to Call a Pro: Recognizing Your Limits
While replacing the 2018 Ford Explorer front wheel bearing is a common DIY task, there are times when calling a professional mechanic is the safest and smartest option. Knowing your limits is a sign of a truly experienced DIYer.
Complexities and Stubborn Bolts
Sometimes, bolts can be severely rusted or seized, requiring specialized tools like a torch or heavy-duty impact wrenches that many home mechanics don’t possess. If you’re struggling to loosen a critical bolt, or if you fear stripping a head, stop and consider professional help.
Damaging a bolt or surrounding components can turn a relatively simple job into a much more expensive and time-consuming repair.
Lack of Proper Tools or Experience
If you don’t have access to a reliable torque wrench, sturdy jack stands, or the correct size sockets, attempting this repair is ill-advised. Using improper tools can lead to injury or damage to your vehicle.
Similarly, if you’re uncomfortable working with brake systems or suspension components, or if you’re not confident in your ability to follow torque specifications accurately, a professional will ensure the job is done right and safely.
Additional Issues Discovered
During the wheel bearing replacement, you might uncover other issues, such as worn ball joints, tie rod ends, or CV axle boots. If you’re not equipped to diagnose or repair these additional problems, a mechanic can address everything comprehensively.
A professional can also provide a warranty on parts and labor, offering peace of mind that your Explorer is in top condition.
Frequently Asked Questions About Ford Explorer Front Wheel Bearings
How long does a front wheel bearing last on a 2018 Ford Explorer?
Typically, a front wheel bearing on a 2018 Ford Explorer is designed to last between 85,000 and 100,000 miles, or even longer. However, driving conditions, road hazards like potholes, and off-road use can significantly shorten its lifespan.
Can I drive with a bad front wheel bearing?
While you might be able to drive short distances with a failing wheel bearing, it is highly discouraged. A bad bearing can lead to decreased braking performance, compromised steering, and in severe cases, the wheel could seize or even detach from the vehicle. It’s a significant safety risk.
Is replacing a 2018 Ford Explorer front wheel bearing a difficult DIY job?
For an experienced DIY mechanic with the right tools, it’s a manageable job. It involves removing brake components and working with potentially seized bolts. For beginners, it might be challenging, especially torquing the axle nut correctly. Always assess your comfort level and tool availability before starting.
What’s the difference between a wheel bearing and a hub assembly?
In many modern vehicles, including the 2018 Ford Explorer, the wheel bearing is pressed into and sold as part of the “hub assembly.” This means you replace the entire unit that the wheel bolts to, rather than just the internal bearing races and balls. This simplifies replacement but can be more expensive than just replacing the bearing itself in older designs.
Do I need to replace both front wheel bearings if only one is bad?
Not necessarily. While it’s common for components on the same axle to wear similarly, if only one bearing shows signs of failure, you only need to replace that one. However, it’s a good idea to inspect the other side thoroughly for any early signs of wear.
Replacing the front wheel bearing on your 2018 Ford Explorer might seem like a daunting task, but with this detailed guide, you’re well-equipped to tackle it. Remember, patience, the right tools, and an unwavering commitment to safety are your best allies.
By taking the time to properly diagnose and replace this critical component, you’re not just fixing a noise; you’re restoring your Explorer’s safety, reliability, and smooth ride. Don’t let a failing bearing keep you from your next adventure.
Empower yourself with knowledge, trust your instincts, and don’t hesitate to seek professional help if you encounter challenges beyond your comfort zone. Happy wrenching, and enjoy the quiet hum of a well-maintained machine!
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