Car brakes squeal when cold due to the friction created between the brake pads and the rotors. This friction is caused by the brake pads wearing down due to the heat generated during braking, and the cold temperatures can cause the brake pads to become even more worn. As a result, the pads rub against the rotors, creating a loud squealing noise.
The sound of brakes squealing when cold is a sign that your brakes are in need of attention. The brake pads have likely become too worn, and are in need of replacing. If the brakes continue to squeal when cold, it is important to take your vehicle to a mechanic and have them check the brakes.
The most common cause of brakes squealing when cold is a faulty brake pad. The brake pad is a metal component that pushes against the rotor to create the friction necessary to slow the vehicle. Over time, the brake pad wears down due to the heat generated during braking, and the cold temperatures can cause the pad to become even more worn. This leads to the brake pads no longer being able to make contact with the rotor, causing the squealing noise.
It is also possible for the brake pads to become contaminated with dirt and dust, which can cause them to wear down faster. This is why it is important to regularly check your brake pads and keep them clean. If your brakes are still squealing when cold, despite cleaning them, it is likely that the pads need to be replaced.
A less common cause of brakes squealing when cold is a warped rotor. The rotor is a large metal disc that the brake pads press against to stop the vehicle. If it becomes warped, it can cause the brakes to make a squealing noise when cold, as the brake pads will not be able to make contact with the rotor. If this is the case, the rotor will need to be either resurfaced or replaced.
In some cases, brakes can squeal when cold due to a problem with the brake calipers. The calipers are what press the brake pads against the rotor. If they become stuck, they can cause the brakes to make a squealing noise when cold. If this is the case, the calipers will need to be replaced.
If your brakes are squealing when cold, it is important to take your vehicle to a mechanic and have them check the brakes. It could be a sign that the brake pads are in need of replacing