DIY: Ford Explorer Rear Brake Pad Replacement

Ensuring your vehicle's braking system is in peak condition is paramount for both safety and performance. When it comes to the Ford Explorer, maintaining the rear brakes is just as crucial as the front. While the front brakes handle a larger proportion of stopping power, the rear brakes provide essential stability and contribute significantly to overall braking efficiency. Fortunately, replacing the rear brake pads on your Ford Explorer is a task well within the capabilities of a diligent DIY enthusiast, provided you have the right tools, a keen eye for detail, and a commitment to safety. This guide will walk you through the process, ensuring you understand each step and the critical aspects involved.

Understanding Your Ford Explorer's Rear Brakes

The Ford Explorer, like many modern vehicles, utilises disc brakes on the rear axle. This means the system comprises a caliper, brake pads, and a rotor (disc). When you press the brake pedal, hydraulic pressure forces the caliper to clamp the brake pads against the spinning rotor, creating friction that slows the vehicle down. Over time, these pads wear down and require replacement. Recognising the signs of wear, such as squealing noises, a grinding sensation, or reduced braking performance, is the first step towards timely maintenance.

Essential Tools and Safety Precautions

Before you even think about touching a wrench, it's vital to gather all the necessary tools and establish a safe working environment. Your safety is the absolute priority when working on any vehicle. Always ensure you are working on a level, stable surface and that the vehicle is properly secured.

Required Tools:

• Hydraulic jack
• Jack stands (absolutely essential for safety)
• Wheel chocks
• Lug nut wrench/socket
• Socket set (typically 13mm, 15mm, 18mm, or similar, check your vehicle specific bolts)
• Ratchet
• Brake caliper piston compression tool (or a large C-clamp)
• Wire brush
• Brake cleaner
• High-temperature brake lubricant (silicone-based is often recommended)
• Torque wrench (critical for correct bolt tightening)
• Gloves and safety glasses
• New rear brake pads (ensure they are the correct fit for your Ford Explorer model year)
• Optional: Mechanic's creeper, shop rags

Safety First:

• Always wear safety glasses to protect your eyes from debris, brake dust, or fluid splashes.
• Use gloves to protect your hands from grease and brake dust, which can be harmful.
• Never rely solely on a hydraulic jack; always use sturdy jack stands to support the vehicle once it's lifted.
• Ensure the vehicle is in park (automatic) or gear (manual) and the parking brake is firmly engaged before lifting.
• Place wheel chocks on the wheels that remain on the ground (e.g., front wheels if working on the rear).
• Allow the vehicle to cool down if it has recently been driven, as brake components can be extremely hot.

Step-by-Step Guide: Rear Brake Pad Replacement

This procedure applies to the Ford Explorer's rear disc brakes and is similar to many other disc brake systems, including the front brakes on this vehicle, though specific torque values and bolt locations will differ.

Step 1: Preparation and Lifting the Vehicle

1. Park your Ford Explorer on a firm, level surface.
2. Engage the parking brake fully.
3. Loosen the lug nuts on the rear wheel you intend to work on, but do not remove them yet. Just break them loose while the wheel is still on the ground.
4. Using your hydraulic jack, carefully lift the rear of the vehicle at the designated jacking point until the wheel is off the ground. Consult your owner's manual for precise jacking points.
5. Once lifted, immediately place jack stands under the vehicle's frame at the appropriate support points. Slowly lower the vehicle onto the jack stands, ensuring it is stable and secure.
6. Completely remove the loosened lug nuts and then carefully remove the wheel, setting it aside safely.

Step 2: Inspecting the Braking System

With the wheel off, you will have a clear view of the brake rotor and caliper assembly. Take a moment to inspect the current condition of your brake components:

• Brake Pads: Note the thickness of the old pads. If they are worn down to 3mm or less, they are due for replacement. Look for uneven wear, which could indicate a caliper issue.
• Brake Rotor: Check the rotor surface for deep grooves, scoring, or excessive rust. If the rotor is severely worn or damaged, it might need to be machined (resurfaced) or replaced. While not explicitly covered here, replacing pads on a damaged rotor will lead to premature pad wear and poor braking performance.
• Caliper: Look for any signs of fluid leaks around the caliper or the brake line.

Step 3: Removing the Brake Caliper

The caliper houses the brake pads and is the primary component you'll need to manipulate. The information provided states that to install new brake pads, you only need to remove the tyre and the brake caliper. This implies you will be removing the caliper from its sliding pins, rather than the entire caliper bracket.

1. Locate the two sliding bolts (guide pins) on the back of the brake caliper. These typically have rubber boots covering them.
2. Using your socket wrench, carefully remove these two sliding bolts. They might be a bit tight, so apply steady pressure.
3. Once the sliding bolts are removed, the caliper can be carefully lifted off the rotor and the old brake pads. Do not let the caliper hang by its brake line, as this can damage the line. Use a wire hanger or bungee cord to suspend the caliper securely from the suspension component (e.g., spring coil) to prevent strain on the brake hose.

Step 4: Removing Old Brake Pads and Preparing the Caliper

1. With the caliper safely suspended, you can now easily slide the old brake pads out of the caliper bracket. Note how they were seated, especially if they have wear indicators.
2. Using a wire brush, clean any rust or debris from the caliper bracket where the pads sit. This ensures the new pads can move freely.
3. Now, you need to compress the caliper piston back into the caliper body to make room for the thicker new pads. Place one of the old brake pads against the piston, then use your caliper piston compression tool (or C-clamp) to slowly and steadily push the piston back until it is flush with the caliper body. As you do this, keep an eye on the brake fluid reservoir under the bonnet, as the fluid level will rise. If it's near the 'MAX' line, you might need to remove a small amount of fluid to prevent overflow.
4. Clean the caliper sliding pins and apply a thin layer of high-temperature brake lubricant to them. Also, lubricate the contact points on the caliper bracket where the new brake pads will slide. This helps prevent noise and ensures smooth operation.

Step 5: Installing New Brake Pads

1. Carefully insert the new brake pads into the caliper bracket. Ensure they are seated correctly and can slide freely within the bracket. Some pads come with new shims; if so, replace the old ones.
2. Gently lower the caliper back over the new pads and rotor, aligning the holes for the sliding bolts.
3. Reinsert the two caliper sliding bolts and hand-tighten them to ensure they thread correctly.
4. Now, use your torque wrench to tighten the rear brake caliper sliding bolts to the specified torque. According to the provided information, the Ford Explorer Rear Brake Caliper Torque Spec is 24 ft-lbs.
5. The information also mentions the caliper's banjo bolt that holds the brake line onto the caliper. If you disconnected this bolt (which is not typically required for a pad-only replacement, but might be for other repairs), you must torque it correctly. The Ford Explorer Rear Brake Banjo Torque Spec is 26 ft-lbs. Ensure this bolt is secure if it was loosened.

Step 6: Reinstalling the Wheel and Final Checks

1. Reinstall the wheel onto the hub, hand-tightening the lug nuts.
2. Carefully raise the vehicle slightly with the hydraulic jack to remove the jack stands.
3. Slowly lower the vehicle completely to the ground.
4. Once on the ground, use your lug nut wrench or torque wrench to tighten the lug nuts in a star pattern to the manufacturer's specified torque. (Consult your Ford Explorer owner's manual for the correct lug nut torque specification, as it was not provided in the source material, but is typically around 100 ft-lbs).
5. Repeat the entire process for the other rear wheel if you are replacing both sets of pads, which is highly recommended for balanced braking.

Step 7: Post-Installation Procedures and Test Drive

This is a critical step to ensure your brakes are functioning correctly before driving.

1. Before starting the engine, get into the vehicle and slowly pump the brake pedal several times until it feels firm. This re-seats the caliper pistons against the new pads. Do not skip this step!
2. Check the brake fluid reservoir level under the bonnet. Top up with the correct DOT-rated brake fluid if necessary, but avoid overfilling.
3. Start the engine and ensure the brake pedal remains firm.
4. Take your Ford Explorer for a cautious test drive in a safe, open area at low speeds. Apply the brakes gently several times to bed in the new pads. Avoid harsh braking initially. You might notice a slight burning smell; this is normal as the pads bed in.
5. Listen for any unusual noises and feel for any vibrations. If anything feels or sounds off, re-check your work.

Important Torque Specifications Summary

Using a torque wrench is non-negotiable for critical components like brake bolts. Overtightening can strip threads or stress components, while undertightening can lead to dangerous loosening.

When to Change Your Rear Brake Pads

It's not always about mileage; your driving style and conditions play a huge role. Here are common indicators that your rear brake pads need attention:

• Squealing or Chirping: Many pads have built-in wear indicators that produce a high-pitched squeal when they are low.
• Grinding Noise: If you hear a grinding sound when braking, it means the pads are completely worn, and the metal backing plate is rubbing against the rotor. This can quickly damage your rotors.
• Reduced Braking Performance: A spongy brake pedal, increased stopping distances, or a feeling that the brakes aren't as effective as they used to be.
• Visual Inspection: If you can see that the pad material is thin (less than 3mm), it's time for replacement.
• Dashboard Warning Light: Some modern Explorers may have a brake wear sensor that triggers a warning light on your dashboard.

Frequently Asked Questions (FAQs)

Q: How often should I change my Ford Explorer's rear brake pads?

A: There's no fixed interval. It depends on your driving habits, road conditions, and the quality of the pads. Generally, rear pads can last anywhere from 30,000 to 70,000 miles (approximately 48,000 to 112,000 kilometres). Regular visual inspections are the best way to determine their condition.

Q: Do I need to bleed the brakes after changing just the pads?

A: Typically, no. If you only replace the pads and do not open the brake line (i.e., you don't disconnect the banjo bolt or any other hydraulic line), you shouldn't need to bleed the system. However, if the brake pedal feels spongy after pumping it, or if you had to remove a lot of fluid from the reservoir, a bleed might be beneficial or necessary.

Q: Can I replace only one side's rear brake pads?

A: It is highly recommended to replace brake pads on both sides of an axle (e.g., both rear wheels) simultaneously. This ensures even braking performance and prevents one side from wearing faster or braking more effectively than the other, which can lead to instability.

Q: What if my brake rotors are worn or damaged?

A: If your rotors have deep grooves, excessive rust, or are below the minimum thickness specification (usually stamped on the rotor), they should be machined (if possible and within spec) or replaced. Installing new pads on a worn rotor will reduce the lifespan of the new pads and compromise braking performance. While this guide focuses on pads, consider rotor condition as part of your brake maintenance.

Q: Why are the rear brake pads important if the front brakes do most of the stopping?

A: While front brakes handle the majority of stopping power, rear brakes are crucial for vehicle stability during braking, especially under hard braking or in emergency stops. They help prevent the rear wheels from locking up and assist in maintaining control, contributing significantly to the overall effectiveness of your braking system.

Replacing the rear brake pads on your Ford Explorer is a rewarding DIY project that can save you money and give you a deeper understanding of your vehicle. By following these steps carefully, paying close attention to safety, and adhering to the correct torque specifications, you can ensure your Explorer's braking system remains reliable and safe for many miles to come. Remember, when in doubt, consult a professional mechanic, but with the right guidance, you're well on your way to becoming your own automotive expert!

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