Understanding Brakes Squealing: Common Causes and Solutions
Have you ever heard a high-pitched squealing sound coming from your car's brakes? It's a common occurrence, but it doesn't always mean there's something wrong. In this article, we'll explore when brakes are supposed to squeal, how to differentiate between normal and problematic squealing, and what steps you can take to address the issue.Brakes Squealing: Is It Normal?
Brakes are designed with a built-in safety mechanism that alerts drivers when it's time to change them. In many cases, this is achieved through squealing. However, it's important to understand the nuances of brake squealing.Normal Squealing: When Brake Pads Are Almost Worn Out
It is normal for brakes to squeal when the pads are almost completely worn out. This is a low-tech but effective method used by car manufacturers to alert drivers that they need to replace their brake pads. If the dashboard light has gone out, but you still hear a squealing sound, it's a good indication that you're due for new pads.Squealing with New Brake Pads
Sometimes, even brand new brake pads can produce a squealing noise. This can be attributed to warped brake rotors or a bad interaction between the new pads and the rotors. Here’s what you can do:1. **Warped Brake Rotors**: If the brake rotors are warped, they will not engage properly with the pads, leading to squealing. This is a relatively common issue and can be addressed by having the rotors resurfaced or replaced.2. **Incompatible Brake Pads and Rotors**: Sometimes, the new pads simply don't work well with your existing rotors due to manufacturing inconsistencies. The best course of action is to switch to a different brand of brake pads and see if the issue resolves. If the squealing continues, it might be time to replace the rotors as well.Common Causes of Brakes Squealing
Brake squealing can often be linked to how you drive. Here are some common scenarios that can lead to excessive squealing:1. **Incorrect Braking Technique**: Driving with a light, prolonged application of the brakes can lead to glazing of the brake pads and rotors. This glazing is what causes the high-pitched squealing sound. Frequent use of the brakes in this manner can significantly reduce the lifespan of your braking system and, in worst-case scenarios, make the brakes less effective when needed most.It is far better to brake twice — brake, release, then brake again — than to apply the brakes lightly and continuously. This technique helps maintain better brake function and reduces unnecessary wear on the pads and rotors.
2. **Automatic Transmissions and Frequent Squealing**: Cars with automatic transmissions often have a tendency to engage the brakes more frequently and subtly. This can lead to more frequent squealing as the pads and rotors are subjected to more stress than they're intended to handle. Drivers of such vehicles need to be more mindful of their braking techniques to avoid excessive squealing and wear on their brakes.