Buenas,
Me he dado cuenta de casualidad de como está el disco de freno de la rueda delantera. Una circunferencia perfecta en la rueda delantera izquierda. Es un bmw 320d…
Causas? Tengo que preocuparme?
una de las posibles causas, que no digo que sea el caso, pero para que lo evalues:
volviendo al tema de la entalla, tambien hay un articulo que comenta una posible razon para la presencia de rayas, la calidad de las pastillas por la presencia de impurezas de carburo de silicio en grafitos artificales reciclados:
" 1. There is a problem with the raw materials of the brake pads. Among all brake pad materials, the most easily scratched disc is artificial graphite. The hardness of artificial graphite itself is very soft, and the hardness of the impurity silicon carbide in it is close to that of diamond, which is enough to scratch the brake disc. For the artificial graphite used in brake pads, most small factories use recycled waste graphite (recycled graphite will never be used in big brand products). Silicon carbide becomes a very harmful substance.
y un segundo tema, mas raro si las pastillas son nuevas:
2. The brake pad attachment will also draw the brake pad out of the groove. Some brake pads have alarm pads (alarm pads are generally made of stainless steel). When the brake pads are ground to the position of the alarm pads, the alarm pads will rub against the brake disc and emit a harsh scream to remind the owner to change the brake pads. . If the car owner doesn't pay attention to the sound and let the alarm pads and brake pads grind, the brake disc will be scratched. This kind of pit generally only has one groove, and the brake pad can be replaced directly if it is not serious. When this happens, the position of the groove in the general brake disc is fixed, which is the position where it contacts the alarm pad. "
a partir de aqui