17/05/2004
When it comes to vehicle safety, few components are as critical as your brakes. They are your primary defence against accidents, and ensuring they are in peak condition is paramount for every driver. As part of routine maintenance or when you notice a degradation in stopping performance, replacing your brake pads is a common task. However, a question often arises amongst DIY enthusiasts and even seasoned mechanics: do new brake pads typically come with the necessary hardware?
The straightforward answer is: not always. While some premium brake pad sets will include the full complement of hardware, many standard or budget-friendly options might not. This isn't necessarily a drawback, but it is a crucial detail to be aware of before you embark on a brake job. Understanding what brake hardware entails and why it's so important is key to a successful and safe brake replacement.
Understanding Brake Hardware: More Than Just Pads
Brake hardware refers to the various clips, springs, shims, and pins that work in conjunction with your brake pads and calipers. These small, often overlooked components play a vital role in the overall performance and longevity of your braking system. They ensure the brake pads sit correctly, move freely within the caliper bracket, reduce noise, and prevent premature wear.
Key Components of Brake Hardware:
- Anti-Rattle Clips/Springs: These metal clips apply tension to the brake pads, keeping them snug against the caliper bracket and preventing them from vibrating or rattling, which can cause annoying noises.
- Caliper Guide Pins/Sleeves: Also known as slider pins, these allow the brake caliper to float or slide freely as the brake pedal is depressed and released. Proper lubrication and free movement of these pins are crucial for even pad wear and effective braking.
- Pad Shims: Thin metal or rubber layers placed between the brake pad backing plate and the caliper piston or caliper fingers. They help to dampen vibrations, reduce noise (squealing or grinding), and dissipate heat.
- Mounting Bolts: While sometimes considered part of the caliper, the bolts that secure the caliper to the bracket and the bracket to the spindle are essential and often require replacement or proper torqueing.
Each of these components contributes significantly to the smooth and quiet operation of your brakes. Over time, due to heat, corrosion, and general wear and tear, these hardware pieces can degrade. They might become rusty, bent, or lose their tension, leading to issues like uneven pad wear, excessive noise, or even reduced braking efficiency.
When to Replace Brake Hardware
Given that new brake pads don't always include hardware, it’s imperative to consider its replacement during every brake job. Even if the existing hardware appears to be in good condition, it's generally best practice to replace it. Think of it as a complete system overhaul; you wouldn't replace just one part of a critical system if others are also prone to wear.
Here's why replacing hardware with every pad change is a sound investment:
- Corrosion and Wear: Brake hardware is exposed to extreme conditions – high heat, road salt, water, and debris. This leads to rust and wear, which can impede the proper movement of brake pads and calipers.
- Noise Reduction: Worn or fatigued anti-rattle clips are a common cause of brake squeal or rattle. New hardware ensures a snug fit, eliminating these irritating noises.
- Even Pad Wear: Freely moving guide pins and properly tensioned clips ensure that the brake pads press evenly against the rotor, leading to consistent braking performance and extended pad life.
- Optimised Performance: Fresh hardware restores the braking system to its optimal operating condition, providing consistent, reliable stopping power.
If your new brake pads don't come with hardware, don't fret. Most reputable automotive parts retailers will sell brake hardware kits separately for specific vehicle models. It's a small additional cost that yields significant benefits in terms of safety, performance, and peace of mind.
The DIY Brake Job: A Step-by-Step Overview
Replacing brake pads and hardware is a manageable task for the competent DIY mechanic, saving you money on labour costs. However, it requires patience, the correct tools, and strict adherence to safety procedures. Here’s a general overview, highlighting points where hardware plays a role:
1. Preparation and Safety First
Before you even loosen a lug nut, safety must be your top priority. Ensure your vehicle is on a flat, stable surface. Chock the wheels that you aren't working on to prevent any accidental movement. Consult your car's owner's manual for factory-approved jacking points. Use a sturdy jack to raise the vehicle, and crucially, always use jack stands to support the vehicle securely before you begin any work underneath it. Never rely solely on a jack. Wear appropriate personal protective equipment, including safety glasses and gloves.
2. Wheel Removal and Initial Inspection
Once the vehicle is safely supported, loosen the lug nuts (while the wheel is still on the ground, slightly) and then fully remove them. Take off the wheel. This is your first opportunity to visually inspect the brake system. Look for signs of brake fluid leaks, heavy rust on components, or any visible damage to the brake lines or caliper. This is also a good time to check the condition of your brake discs (rotors) for excessive wear, deep grooves, or warping.
3. Caliper and Bracket Removal
To gain easier access to the caliper bolts, you might find it helpful to turn your steering wheel 45 degrees. Before fully removing the caliper, you may need to gently push back the caliper piston slightly to clear the rotor, using a flathead screwdriver or a pry bar. Then, remove the two caliper bolts from the back of the caliper. Once these are off, the caliper should slide freely. It's crucial to hang the caliper out of the way using a wire hanger or bungee cord. Never let it hang by its brake hose, as this can damage the line and lead to dangerous brake fluid leaks.
Next, remove the caliper bracket from the spindle. This typically involves two larger bolts. Once the bracket is detached, the old brake pads and hardware should be easily removed from the bracket.
4. Caliper Piston Compression and Rotor Removal
With the old pads out, now is an ideal time to compress the caliper piston. This is necessary to create space for the thicker new pads. If your caliper has a bleeder valve, it's often recommended to open it (after removing any dust cap) using a 10mm socket wrench. This allows brake fluid to escape as the piston is compressed, preventing it from being forced back into the ABS modulator or master cylinder, which can sometimes cause damage. Use a brake bleeder kit or a drain pan to catch the fluid. A caliper compression tool, often available for loan from automotive retailers, and an old brake pad will make this job much easier and protect the caliper. Compress the piston until it stops, ensuring no air gets into the system by keeping the bleeder valve facing up. Once compressed, tighten the bleeder valve.
The brake disc (rotor) is usually held on by a single retaining screw or simply by the wheel when installed. If it's stuck due to rust, a few taps with a dead blow hammer and some brake cleaner can help loosen it. In some rear brake systems, you might need to back off the parking brake shoes if they are integrated into the rotor hub.
5. Installation of New Components
This is where your new brake pads and hardware come into play. Begin by thoroughly cleaning the new rotors with brake cleaner and a clean rag to remove any protective coating or debris. Then, install the new rotor onto the hub.
Next, it's time to prepare the caliper bracket. Clean away any dirt, rust, or debris from the bracket, especially in the areas where the new hardware will sit. Now, install the new brake pad hardware. These clips and springs fit into specific grooves on the caliper bracket. Once installed, apply a thin layer of high-temperature brake caliper grease directly to the areas of the new hardware where the brake pads will slide. This prevents noise and ensures smooth movement. Be careful not to get any grease on the friction material of the brake pads or the rotor surface.
Reinstall the cleaned and lubricated caliper bracket onto the spindle, ensuring the bolts are tightened to the manufacturer's recommended torque specifications. These specifications can be found in a repair manual specific to your vehicle.
Now, install the new brake pads into the caliper bracket, making sure they sit correctly on the new hardware. Before reattaching the caliper, double-check that the brake hose hasn't become twisted. A twisted hose can restrict fluid flow and impair braking. Apply a small amount of brake caliper grease to the back of the brake pads where they contact the caliper pistons or fingers. Pivot the caliper back into position over the new pads and rotor. Reattach the caliper bolts and tighten them to the correct torque specifications.
6. Post-Installation Bleeding and Priming
Once the caliper is reinstalled, it's a good idea to bleed the brake system one more time at that wheel to ensure no air has entered the system during the process. Tighten the bleeder valve securely.
Finally, reinstall the wheel, tightening the lug nuts in a star pattern for even seating. Lower the vehicle off the jack stands and fully tighten the lug nuts to the specified torque. Repeat the entire process for the other wheels.
After completing the brake job, it's crucial to prime your brakes. With the engine off, step on the brake pedal several times until it feels firm. This extends the caliper pistons closer to the new pads and seats the components. Then, check your brake fluid reservoir under the bonnet and top it up if necessary with the correct type of brake fluid.
Breaking In New Brakes: The 30-30-30 Rule
New brake pads and discs need a proper 'bedding-in' process to ensure optimal performance and longevity. A common recommendation is the "30-30-30 rule":
- Make 30 moderate stops from 30 miles per hour (approx. 48 km/h).
- Allow 30 seconds of cooling time between each stop.
- Avoid harsh braking or high-speed stops during this process.
This helps to transfer a thin, even layer of friction material from the pads to the rotors, improving braking effectiveness and reducing the chance of noise.
Comparison of Brake Pad Options
When purchasing new brake pads, you'll encounter various types, each with different characteristics regarding material, performance, and whether hardware is included.
| Brake Pad Type | Typical Material | Pros | Cons | Hardware Included? |
|---|---|---|---|---|
| Organic (NAO) | Non-asbestos organic compounds (rubber, carbon, glass, etc.) | Quiet, low dust, gentle on rotors | Lower friction, shorter lifespan, not for heavy use | Less likely |
| Semi-Metallic | 30-65% metal (copper, iron, steel, brass) | Good braking, effective in various temperatures, durable | Can be noisy, produce more dust, harder on rotors | Sometimes |
| Ceramic | Ceramic fibres, filler materials, bonding agents | Very quiet, low dust, long-lasting, consistent performance | More expensive, less effective in extreme cold | More likely |
Always check the product description carefully to see if hardware is included, especially if you opt for non-OEM (Original Equipment Manufacturer) pads.
Frequently Asked Questions About Brake Pads and Hardware
Q: How often should I replace brake hardware?
A: It is highly recommended to replace brake hardware every time you replace your brake pads. This ensures optimal performance, reduces noise, and promotes even pad wear.
Q: Can I reuse my old brake hardware if it looks fine?
A: While technically possible, it is not recommended. Old hardware can be fatigued, corroded, or bent, even if it looks okay. Reusing it can lead to premature wear of new pads, increased noise, and reduced braking efficiency.
Q: What kind of grease should I use for brake hardware?
A: Always use a high-temperature, synthetic brake caliper grease. Never use petroleum-based greases, as they can damage rubber components and are not designed for the extreme temperatures found in braking systems.
Q: How do I know if my brake hardware is failing?
A: Common signs of failing brake hardware include excessive brake noise (squealing, rattling, grinding, especially when not braking), uneven brake pad wear, or a spongy brake pedal. Visual inspection for rust, bending, or missing clips is also important.
Q: Is it difficult to install brake hardware?
A: Installing brake hardware is generally straightforward. The clips and springs are designed to fit into specific slots on the caliper bracket. The main challenge is often ensuring the bracket is thoroughly cleaned before installation. If unsure, a reputable repair manual or online tutorial can provide specific guidance for your vehicle model.
Conclusion
While the answer to "Do new brake pads come with hardware?" is a nuanced "sometimes," the takeaway message is clear: brake hardware is an integral part of your braking system and should be replaced with every brake pad change. These seemingly small components play a monumental role in your vehicle's safety, performance, and the longevity of your brake pads and discs. By understanding their function, knowing when to replace them, and following proper installation procedures, you can ensure your car's stopping power remains robust and reliable, keeping you and others safe on the road.
If you want to read more articles similar to Brake Pads & Hardware: The Full UK Lowdown, you can visit the Brakes category.