What s the deal with the brakes and what is the matter with the squeaks when braking?

Abnormal brake noise. The more common loose dress in the braking system is the abnormal brake noise, which many owners have encountered. Generally, the brake noise is when the vehicle is driving when the brakes are pressed, and the braking system will emit a sharp metal friction sound, which often appears after rain.

If this situation occurs, it is mostly because the brake pads are thinned, and the back plate grinds the brake disc, the brake pads are hard, and there are foreign objects in the brake pads, which will cause abnormal noise, so when there is a brake abnormal sound, the thickness should be checked first, and the thickness is no problem, and a few feet of the brake may alleviate the abnormal noise problem.

"Off-track" when braking

Brake deviation is also brake deviation, brake deviation phenomenon is the owner when the brake steering wheel has obvious deviation to one side, that is to say, the braking force is large, and the braking force is small. This kind of malfunction mainly occurs in older cars, and once it occurs, it is easy to cause accidents. The main reason for this situation is that the brake pads are eccentric or there is a problem with the brake cylinder, so once this situation is out of order, it is necessary to immediately go to the inspection macro stove to check.

The brake pedal is "soft" and the braking force drops.

Most experienced drivers should be well aware of what a "soft" brake pedal looks like, and there are many reasons for this failure:

1. If there is a problem with the brake fluid, too little brake fluid, deterioration, air intake, and long-term non-replacement will lead to problems, so the brake fluid needs to be replaced regularly.

2. There is oil leakage at the brake cylinder or pipeline and joint.

The stroke of the brake pedal increases for no reason, and the brake pedal does not return.

1. There is air in the brake duct that needs to be emptied.

2. There is a problem with the brake master cylinder (in serious cases, it can lead to brake locking).

3. For some models that use rear wheel drum brakes, too large a gap between the brake shoe and the brake drum will also lead to the failure of soft brakes and excessive stroke.

The brake pedal is stiff and the braking force is severely reduced.

Many car owners have encountered the phenomenon of brake hardening, because the brake booster system is mostly vacuum assistance, when the engine is not started, the vacuum pump of the brake system will not produce assistance, then there is no power to step on the brakes, and it feels naturally heavy, so when the car is driving when the brakes are particularly hard, it is likely that there is a problem with the vacuum booster.

Brake system maintenance is important.

The braking system is a maintenance item that many car owners will ignore, and the maintenance of the braking system is not only to replace the brake oil, but also to disassemble the brake cylinder, clean it up, and lubricate it to prevent the brake cylinder from being stuck due to excessive wear and excessive wear of the brake cylinder due to excessive dirt and lack of lubrication. Generally, a maintenance should be carried out when changing the brake fluid or when changing the brake pads.

1.Sounds caused by human factors. For example, if the repairman installs the brake pad offset, he can go to the 4S shop to reinstall it; There may be stones or foreign objects caught on the brake pads when driving, and you can go to the 4S shop to clean up; Or the manufacturer's problem, the size of the friction block of the same type of brake pad may be inconsistent, which causes the surface of the brake disc to look smooth, but the large size of the brake pad will also sound if it hits the brake disc rubbed by the small brake pad;

2.Noise caused by product factors such as brake pad material;

3.abnormal noise of brake pads caused by wounded discs;

4.Abnormal noise of brake pads caused by slag falling or falling off of friction blocks;

5.The brake cylinder is rusty. If the brake fluid is not changed for a long time, the oil quality will deteriorate, and the moisture in the oil will react with the sub-pump (cast iron) and rust. resulting in friction and abnormal noise;

Solution to abnormal brake noise:

1. Pressing the brakes several times or pressing the brakes several times in an open place will be improved;

2. It is necessary to replace the brake pads of the car in time to prevent danger.

My car is about 7,000 kilometers at the beginning, the brake has been a slight pitch sound of stable "chirp", raise your foot to stop, in the car it sounds like the left front wheel. Many people on the forum mentioned this situation, and it almost became a ** mark. The reason for this is probably that there are hard metal particles on the brake pads, grinding the brake disc and ringing.

What's the deal with the rattle?

What's going on with the sizzle of car brakes.

What's the deal with the rattle?

1. Normal noise phenomenon. The brake pad is composed of iron sheets, graphite, asbestos, etc., when it rubs against the brake disc, it will inevitably produce some metal powder, and at this time, people will make some squeaky noises when they step on the brakes.

Solution: The noise of the vehicle will be reduced after a period of time.

2. Rust of brake discs or brake pads: When parking for a long time, especially after humid climate or rain, there will be a certain amount of rust or dirt on the brake discs or brake pads.

Solution: Clean the brake plate and brake pads in time, you can apply butter or special lubricating oil to the connection between the brake pads and the brake caliper, and if the corrosion is serious, it needs to be replaced.

The main squeaks when braking are:

1. The run-in of new cars, in which the run-in of brake pads is a very important link, usually after running hundreds of kilometers, you can feel that the brakes will be more comfortable.

2. The new brake pads also need to be better combined with the old disc through running-in, and when you first put it on, you will feel that the brakes are very hard, and you usually need to drive hundreds of kilometers to feel better.

3. During the driving of the vehicle, there may be a very small sand particle into the middle of the piece and the plate, and sometimes there will be abnormal noise due to friction.

The squeak when talking about the car is probably because the brake fluid is running out and you need to change the brake fluid or add lubricating oil. There is also the possibility that you forgot to pick up the gear when braking. The Shenshi car with manual wide limb gear brakes without taking off the gear, which is not only easy to stall, but also easy to damage the power system.

1. Use inferior and excellent brake pads. If we use inferior or hard brake pads, the brake pads will squeak when we rub against the brake discs. Therefore, when we replace the brake pads, we must use high-quality brake pads.

2. There is slippery sand and foreign matter between the brake pad and the brake disc. In the process of our ordinary driving, it is inevitable to pass through some more complex road conditions. Due to the unique design of the disc brake, some sand and foreign objects will inevitably enter between the brake pads and the brake disc, so that there will be abnormal noise when braking.

3. The brake disc is seriously worn. If you use inferior brake pads, or if there are hard foreign objects getting between the brake pads and the brake disc, it will cause abnormal wear of the brake disc. If the brake disc is worn too badly, we will also have a squeaky sound when we apply the brakes.

4. Brake pad alarm. Many people don't know how many kilometers the brake pads are replaced. In fact, there is no mandatory provision for how many public mills to be replaced, as long as they are thin, they can be replaced.

Some brake pads have electronic alarms, and some low-end cars use alarm pads, if the wear of the brake pads reaches the warning line, it will send out a squeaky alarm sound, and it will be replaced in time.

1. Rotten brake discs or brake pads are corroded.

When parking for a long time, especially after the climate is humid or rainy, there will be a certain amount of rust or dirt on the brake disc or brake pads, which can be solved by driving for a while, or you can apply butter or special lubricating oil to the connection between the brake pads and brake calipers.

2. New brake pads.

If your car is a new car or has just been replaced with new brake pads, then the new brake pads and brake discs need a run-in process, when the brakes are stepped on, this abnormal sound will be emitted, which is completely normal, but this kind of sound does not disappear after opening this leakage for a period of time, there is a problem;

3. Excessive wear of brake discs and brake pads.

Brake discs and brake pads are high consumables, each time the brake two parts have to rub, in the long run, there will be natural loss, when the wear is excessive, there will naturally be abnormal noise, so it should be checked and replaced regularly. Usually the replacement cycle of brake pads is 6-80,000 km, while the brake disc is 10-120,000 km.

Abnormal brake noise is a headache. First of all, you have to distinguish between the sound of abnormal noises, whether it is screaming, muffled, or screaming. 1. If it is screaming, the first thing to check is to despise the brake pads that are running out (the alarm pads sound).

If it is a new lead potato chip, then check whether there is any foreign object caught between the brake disc and the chip. 2. If it is muffled, it is mostly a problem with the brake caliper.

There is also a situation where there will be this kind of "squeak" sound, that is, when the weather is windy, small sand and dust may be blown between the brake pads and the brake disc, and when braking, rubbing small sand particles will also make this soundThe second sound is that when our car does not drive for a long time, or after a few days of rain, when we drive again, we will hear a "rattle" sound the moment we start the carThis is caused by rain or moisture entering between the brake pads and the brake disc, rusting and rusting, causing the brake pads and brake discs to stick together

In this case, there is no need to worry, step on the brakes a few more times, and it will be fine to wear off a layer of rust on the surface, which will not affect the brake pads and our safe drivingThere is also a third situation that can also hear the sound of gurgling, which is when the car brakes suddenly, and Yu regret can also feel very clearly that the pedal we press the brake will also "cluck" vibrate.

1. Brake pad quality problems.

If the owner installs the brake pads that are not provided by the regular manufacturer, or the inferior line grinding brake pads purchased by themselves. The hard material will hear the squeak of the gear fingers when braking, and it will also damage the brake disc, so you still have to go to a regular 4S shop to replace the original brake pads.

2. A foreign object has been inserted into the brake disc.

When driving in complex road conditions, the wheels can easily shake up stones or other foreign objects. The disc brake is different from the drum type, the stone is opened between the brake pad and the brake disc, and the abnormal sound occurs when braking.

3. The brake disc is seriously worn.

Sometimes the brake disc is directly scraped by a foreign object, or hit by other objects, leaving potholes on the surface. When the brake pads rub against the uneven brake discs, they also make a squeaky sound.

4. The brake pads are seriously worn.

When the car is driven for a certain period of time, the brake pads will become thinner under long-term friction. Brake pads that are too thin not only lead to a decrease in braking effect, but also cause abnormal braking noise due to the hardening of the material.

5. The brake disc is rusty.

Perennial wind and rain, brake discs may also rust. However, there is no need to worry about this situation, after pressing the brakes a few more times, the rust layer on the brake disc will be worn off.

6. Assembly problems.

If the workshop master is not serious when assembling, it will also cause the brake to make abnormal noise, and it will not be installed firmly or the installation will be crooked. This situation is more likely to occur with a roadside stall to change the brake pads, or you are unlucky that the new apprentice from the 4S shop will help you replace it.

There are several reasons for the rattling of the car: 1. Use inferior or hard brake pads. If the brake pads are too hard or of poor quality, the brake pads will make a loud noise when they rub against the brake disc during the brake application.

2. There is sand or other foreign objects between the brake pads and the brake disc, which will make a rattling sound during the braking process. 3. The brake disc is seriously worn. If there is a shortage of inferior brake pads or foreign objects in the brake disc, it will cause the rapid wear of the brake disc.

If the brake disc is worn too much, the brakes will make a rattling sound. 4. The brake pad emits an alarm sound. The brake disc becomes thinner and thinner during use, and if the wear level reaches the threshold of the warning line, an alarm sound will sound.

Reasons for brake chirping: 1. Brake pad quality problems If the owner does not install the brake pads provided by the regular manufacturer, or the inferior brake pads purchased by themselves. Excellent materials will squeak when braking, and the brake disc will also be damaged, so it is still necessary to go to a regular 4S shop to replace the original brake pads.

2. When the foreign object has entered the brake disc and is driving in complex road conditions, the wheel is easy to throw stones or other foreign objects upward. Disc brakes are different from drum brakes. When the stone between the brake pad and the brake disc is opened, an abnormal noise is generated during braking.

3. The brake disc is seriously worn, and sometimes the brake disc is directly scratched by foreign objects or hit by other objects, leaving pits on the surface. The brake pads also squeak when they rub against the uneven brake discs. 4. The brake pads are seriously wornWhen the car is driven for a period of time, the brake pads will become thinner under long-term friction.

Brake pads that are too thin will not only reduce the braking effect, but also produce abnormal noise during braking due to the hardening of the material. 5. The brake disc is rusty all year round, and the brake disc may also be rusty. However, there is no need to worry about this kind of talk.

After pressing the brake chain lifter several times, the rust layer on the brake disc will wear out.