How to identify the need to replace brake pads
1. Observe the thickness of the brake pads
Generally, the thickness of new brake pads It is 1.5 cm. We can regularly observe the thickness of the brake pads ourselves. If the brake pads are no longer visible, they must be replaced in time. Of course, the two rear wheels of some vehicles are difficult to observe, so go to a repair shop or check the vehicle during maintenance.
2. The trip computer prompts replacement
Generally, there is a brake warning light on the car dashboard. When the warning light lights up, it reminds you to check the brake pads, but When the warning light comes on, it means that the replacement limit has been reached and must be checked immediately. All cars have this warning system, but some directly sense the thickness of the brake pads, and some only light up when the brake pads have been completely worn out and the brake fluid drops extremely.
3. Listen to the sound
Brake discs are mostly made of iron. They are prone to rust after being parked for a long time, especially on rainy days. At this time, apply the brakes There will be a slight sound at the same time, which will disappear after driving for a while and applying the brakes a few times. However, if it does not improve after a period of time, the brake pads must be replaced immediately. Because the limit marks on both sides of the brake pad have directly rubbed against the brake disc, it proves that the brake pad has exceeded the limit. And in this case, when replacing the brake pads, you must also check the brake disc. When this kind of sound occurs, the brake disc is often damaged. At this time, even if you replace the new brake pads, the sound still cannot be eliminated. In severe cases, the brakes need to be replaced. plate.
4. Braking response and stroke
When the brake pads become thinner, the car’s braking response will also become slower, and we need to brake deeper and heavier Only by pressing the brakes can the previous braking effect be achieved. When you find that the braking effect is significantly weakened in the first half of the braking process, the brakes become soft, and it is a bit difficult to brake, you should check whether the brake pads need to be replaced.
How to replace car brake pads
Tools required: wrench, socket, piston pump, silencer paste.
Method steps:
1. Before replacing the brake pads, you should open the cover of the brake fluid storage tank in the engine compartment and check the height of the brake fluid page. If the brake fluid level is If the page is above the highest limit, some brake fluid should be sucked out to prevent the brake fluid from overflowing during the replacement process.
2. Prepare the brake pads to be replaced and remove the wheel where the brake is located. Avoid scratching the rim during disassembly.
3. Use a wrench and a sleeve to remove the bolts of the brake caliper, and then remove the brake pads (if there is a brake sensor wire, remove the brake sensor wire first). Observe whether the brake pads are excessively worn or have cracks. If so, proceed to the next step of replacing them.
4. Because the brake calipers will have a lot of sand or mud, so clean it with a rag, and then apply silencer paste to prevent abnormal noise when braking.
5. Use the piston pressure pump to press the piston to the position where it cannot be pressed, and then install the brake pads on the brake calipers. After the new brake pads are installed in place (those with brake sensor lines should also Installed), tighten the guide bolts, and the installation is completed.
6. After installation, close the lid of the fluid reservoir, get into the car, press the brake pedal several times, and reset the brake. Then observe the brake fluid level, which should be within the appropriate height range.
7. After replacement, conduct a test drive to check whether the braking effect is reflected.
What are the precautions when replacing brake pads
1. When choosing brake pads, you should still choose a good quality brand, which will last and be used. Don’t worry. Don’t be too greedy for cheap. If the goods are good, the price will not be very low.
2. Some professional online stores provide one-stop services for buying brake pads and replacing them, but the cost is actually not low, so you can find a nearby specialized shop and ask how much the total labor costs for purchase and replacement are. , see which one is suitable.
3. When disassembling the tire, don’t forget to remind the screws not to touch the aluminum alloy wheel hub, because such aluminum alloy wheel hubs are very soft and the paint will peel off when touched.
4. When replacing the brake pads, there are two wire springs that fix the brake pads. Don’t forget to install them, because sometimes you forget to install them when you are busy.
5. Replace the brake pads. Generally, ordinary mechanical handbrakes are easier to replace. Pay special attention to the replacement of electronic handbrakes to avoid damaging the electronic brake system. Be careful.
6. After the brake pads are replaced, you should pay attention to proper running-in. Do not brake suddenly within 200 kilometers, because the rear brake pads are not in optimal condition at this time.
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