Why New Brakes Make Noise

When you get a fresh set of brakes installed on your car, it’s not uncommon to hear some strange noises initially. You might wonder, “Why are my new brakes making noise?” It’s a valid question and one that often puzzles car owners. In this two-part article, we’ll delve into the world of brake sounds and noises and explore the various reasons behind these sounds when you have new brakes.

The Break-In Process:

New brake components need some time to break in and settle. The break-in process is crucial for the optimal performance and longevity of your brakes. During this time, you might experience certain noises as the components adapt to the rigors of braking. These sounds include minor squeaks and clicks, which usually diminish as the break-in continues.

Brake Pad Material:

The type of brake pad material you choose can significantly influence the noise your brakes produce. Different brake pad materials, such as semi-metallic, ceramic, and organic compounds, have varying levels of noise associated with them. Some materials may generate more noise than others. It’s important to consider your driving preferences and noise tolerance when selecting brake pads.

Resonance and Vibration:

New brake components can sometimes resonate or vibrate as they interact with the rotors. This resonance can create squeaking or humming sounds. Often, this noise diminishes as the parts wear in and settle.

Anti-Squeal Shims:

Manufacturers often include anti-squeal shims with brake pads to reduce noise. These shims act as insulators to dampen vibrations and prevent squeaks. If you’ve had new brakes installed, make sure these shims are correctly positioned, as misaligned or missing shims can lead to noise issues.

Rotor and Drum Surface Finish:

The condition and finish of your rotors or brake drums can also affect brake noise. Smooth, well-machined rotors typically produce fewer noises than rough or uneven surfaces. When new rotors are installed, they may require some time to wear in and attain a smoother finish.

Brake Dust and Debris:

During the first few drives with new brakes, it’s not uncommon for a fine layer of brake dust to accumulate. This dust can result in squeaking noises. However, this issue usually resolves itself as the dust settles and the pads and rotors establish a more consistent contact surface.

Mechanic Check:

If you experience persistent or unusually loud noises from your new brakes, it’s advisable to have a mechanic inspect the installation. Sometimes, the incorrect installation or use of low-quality components can lead to noisy brakes. Ensure that the caliper hardware, brake pad shims, and other parts are correctly installed.

Proper Brake Bedding:

One of the most effective ways to minimize new brake noise is through a process called “brake bedding.” Bedding ensures that the brake pads and rotors conform to each other’s shapes, reducing noise and improving braking performance. It involves a series of controlled stops from moderate speeds to create a uniform transfer film on the rotor’s surface. This process can significantly reduce or eliminate squeaking noises.

High-Quality Brake Components:

Investing in high-quality brake components can make a notable difference in noise reduction. Quality brake pads, rotors, and other hardware are engineered to minimize noise and improve performance. While they may cost more initially, they can lead to a quieter and smoother braking experience.

Anti-Squeal Products:

There are various anti-squeal products available, such as brake lubricants and sprays. These products can be applied to the brake pad’s backing plate or the caliper hardware to dampen vibrations and reduce noise. They are particularly useful when you’re dealing with persistent squeaking.

Resurface or Replace Rotors:

If your new brake noise is primarily coming from the rotors and persists after bedding, you may consider having the rotors resurfaced or replaced. A smooth rotor surface is essential for quiet braking. Rough or damaged rotors can generate more noise.

Regular Maintenance:

Maintaining your brake system is crucial to prevent and address noise issues. Regularly inspect your brakes for signs of wear and damage, and replace any components as needed. Keeping your brake system in good condition can prevent noise from becoming a problem.

Consult a Professional:

If you’ve tried various methods and still experience persistent brake noise, it’s advisable to consult a professional mechanic. They can perform a thorough inspection and identify the root cause of the noise, whether it’s related to component quality, installation, or other factors.

Quiet Braking, Safe Driving:

New brake noise can be concerning, but it’s often a normal part of the break-in process. By understanding why your new brakes make noise and taking appropriate measures to address it, you can enjoy quieter, safer, and more efficient braking. A well-maintained brake system not only reduces noise but also enhances your overall driving experience.

Remember that brake noise is not always a sign of a problem. Sometimes, it’s just your brakes’ way of settling in, ensuring they function optimally and keep you safe on the road.