I don’t understand it, the car’s brakes don’t have much time and when I brake the whole car vibrates, I don’t understand what happens if car shakes when braking. I’m sure many of us have thought this at some time. Warping the car’s brakes is not usually a very common failure, but it is a failure that we notice immediately and it is quite uncomfortable.
The brake discs of our car can be warped mainly for two reasons: they get too hot or out of temper. Let me explain. If the brakes are cold, almost unused and we are braking hard, they get too hot and can easily bend. Another cause is having hot brakes and stepping on a large puddle of water. This puddle causes them to cool quickly, with what that entails.
One way to check that the car’s discs are bent is with a brake tester (for example, at the ITV). By gently breaking our car, the braking force and oscillations when braking can be measured in this machine. With this test, we can conclude if the discs are defective.
This time the damage is done, and we must go to the workshop to solve it. If the discs are not very damaged or very worn, they can be rectified instead of replacing them. With this, what is done is to eat a little of the disk’s surface to equalize it and that, in that way, they regain their shape. This task is fairly straightforward and shouldn’t take more than 2 hours on the front wheels.
Another solution, if the previous one is not viable and surely more expensive, is to replace the brake discs with new ones, in this way we should not have a problem with the new ones and, depending on the vehicle, their price can vary widely.
When you feel a vibration in the brake pedal, steering wheel, or seat during braking, there may be a problem with the braking system, specifically with discs and pads. The most common negativity is associated with the ovality of discs. If the pedal and steering wheel vibrate, the problem is almost certainly anterior; if it involves the seat, the problem could be associated with the rear.
The first important advice of the #StaffRattiAuto, Automotive Experts is not to go too cheap: be wary of excessively low-priced products because they often correspond to low-quality materials, which will wear out in a short time and will not guarantee full efficiency.
The brake pads are composed of compacted powders. If these powders are not well mixed and homogeneous, they could heat the disc in a not perfectly uniform way. Therefore the pad will tend to ovalize and deform the brake disc and create unpleasant vibrations.
For cars with a manual transmission, we recommend that you brake short but hard. Of course, it is not hard to hit, but gently decelerate using the engine brake (i.e., downshifting) and use the brake pedal only to stop the vehicle.
For cars with an automatic gearbox, it is advisable to use the mechanical brake when parked: leave the gearbox in P and release the brake pedal.
Once we have passed through the workshop, we have to do a little break-in with the brakes so that the same thing does not happen to us again. During the first 300 or 500 km, we must use the brake gently to adapt the pads to the discs.