What are the causes of brake noise after vehicle startup?
2 Answers
Vehicle startup after the brake noise causes are: 1, too slow to release the brake caused; 2, the new replacement of the brake pads running-in is not in place; 3, sand particles into the middle of the brake pads and brake discs; 4, the brake disc fixing screws are lost or damaged; 5, the brake system failure. The brake maintenance methods are: 1, high temperature protection, to prevent the brake system corrosion, to prevent the brake pads due to high temperature surface bite, to eliminate the brake pads scream; 2, regular replacement of brake oil; 3, clean the brake discs, brake drums and any parts of the oil stains, dirt and friction dust, to maintain the brake disc heat dissipation good; 4, regular inspection of the thickness of the brake pads or brake shoes.
As a veteran driver with decades of experience, I've encountered numerous cases of brake noise after vehicle startup. The most common cause is rust on the brake discs, especially when starting the car after rain or overnight in humid conditions. The oxidized disc surface rubbing against the brake pads produces a squeaking sound, which sounds harsh but isn't a major issue. If the noise persists, you should be alert to the possibility of brake pads wearing down to the metal layer or sand/small stones stuck in the gaps causing scraping. I once had an old car with frequent noise issues, and inspection revealed dried-up lubrication points on the calipers - applying special grease solved it. In daily driving, avoid frequent short-distance braking to allow the system to fully heat up through friction, which can reduce noise. Try parking in dry locations when possible, and gently applying the brakes a few times after rainy weather to remove rust is also effective. If you're unsure, it's best to have a mechanic inspect it - safety comes first.
