What is the situation when there is a metallic noise on the left rear wheel

If there is no abnormal sound in the clutch engagement, but there is an abnormal sound after pressing the clutch pedal, it may be that the front bearing of the first shaft is damaged. The reason is that when the clutch is engaged, the first shaft rotates with the flywheel, and the front bearing of the first shaft has no relative motion, so there is no abnormal sound or the abnormal sound is not obvious; When the clutch is disengaged, the first shaft is separated from the flywheel, and the inner and outer rings of the front bearing of the first shaft move relatively, and if the bearing is damaged, there is an abnormal sound. If the engine is idling and the transmission is in neutral, there is a less obvious abnormal noise in the front of the transmission, but when the car starts and shifts, the clutch is in a semi-engaged state and makes a strong metal friction sound, which is likely to cause damage to the front bearing of the first axle.

The reason is that when the car starts and shifts, the clutch is in a semi-engaged state, and the front bearing of the first axle is subjected to a large load. If the bearing is damaged, it makes a strong metal grinding sound. If there is an abnormal noise in the front of the transmission, and the abnormal noise disappears after pressing the clutch pedal, it may be that the rear bearing of the first axle and the needle roller bearing at the front of the second axle are faulty.

The reason is that after the clutch is disengaged, the rear bearing of the first shaft and the needle roller bearing at the front of the second shaft do not rotate, and the abnormal noise disappears naturally. If the operation is such as , without stepping on the clutch, tightening the hand brake, and the abnormal noise at the front is aggravated, it is the needle roller bearing at the front of the second shaft that is faulty. The reason is that the clutch is engaged, the first shaft rotates, the hand brake is tightened, the second shaft does not rotate, and the needle roller bearing in front of the second shaft must work, and if it is damaged, there must be abnormal noise.

If the operation is such as, there is a clear abnormal sound during driving, it is most likely caused by the abnormal sound caused by the failure of the constant meshing gear, as for which pair of constant gear failure, it can be judged by listening to the sound from the front to the back by the probe.

There is nothing wrong with it After pulling the handbrake, the brake pads hold the wheels, and some shaking will make a rattling sound, most vehicles are like this Usually getting in and out of the car can often be heard Really nothing is like this The car is like this

Fault 1: Low-speed driving emits a rhythmic humming sound, and high-speed driving abnormal noise is weakened.

Cause of failure: The four-wheel alignment of the vehicle is inaccurate, and the long-distance driving has great wear on the tires, and the tires form eccentric wear and make abnormal noises.

Fault solving: touch the pattern of the tire with your hands, if you can feel the uneven feeling of the inner or outer pattern, it must be the cause of the abnormal noise. Be sure to do a four-wheel alignment first and then change the tires.

Fault 2: The abnormal sound of low-speed driving is not obvious, and the high-speed driving emits a uniform humming sound.

Cause of failure: This phenomenon occurs when one of the wheel bearings of the vehicle is damaged. Long-distance driving has high requirements for the bearings of the wheels, and the bearings with poor quality or have been used for a long time will be damaged due to fatigue and make abnormal noises under long-term high-speed operation.

Fault solving: go to the service station to judge the abnormal noise part, determine which wheel is the problem, and replace it.

Fault 3: The idle speed is high after high-speed driving, or slightly unstable.

Cause of failure: The engine runs at high speed for a long time, and part of the carbon deposits inside the engine will be burned off due to high temperature, and it will be discharged with the exhaust. That's why it's often said that it's easy to drive a car at high speeds.

However, in the control system of some engines, the engine control unit cannot immediately adapt to the reduction of carbon deposits in individual cylinders, and the fuel injection and ignition are carried out according to the previous adaptation values, which will cause the idle speed to change or be unstable. After a few hours of engine operation, the control unit gradually learns the new adaptation values and idling speed resumes.

Troubleshooting: Ignore it, continue driving should be able to recover; If it doesn't stabilize after a few days, you can check at the service station to see if there are any other problems.

Extended information: When driving at low speeds, I heard a slight friction sound on the front wheels, the sound was muffled, and it was also like a leaky sound, which was more noticeable when turning. The most likely reason is that the brake pads have worn out. When cornering, the brake pads will move slightly due to the action of centrifugal force, and they will be closer to the brake disc, and the friction will make a more obvious sound.

If the brake pad grinds into the iron plate of the alarm, it will squeak and the sound will be sharp. This is because the contact area between the iron sheet and the brake disc is small, just like we draw the iron wire on the iron plate. If the alarm iron plate is worn off, and the brake pad is also worn out, it means that the iron plate of the brake pad is in contact with the brake disc and rubbing.

The contact area between the iron plate and the brake disc is large, and the sound is not a sharp creak, but a muffled sound. There will be a friction sound even if you don't step on the brakes, so be sure to check it in time.

What is the reason for the abnormal noise in the front wheels of the car.

Causes of abnormal noise: 1The chassis ball joint is loose. 2.Tire bearings are damaged. 3. The outer cage is damaged. 4.Tire deformation. There are similarities between the four types of hibiki. So, it's best to raise it up and check if the chassis is loose.

Hello, what is the sound? Is it the sound you make when you walk on a bumpy road?

Listen to the sound if it is one of the following situations: 1. Rhythmic sound This may be the friction sound caused by the gap between the brake pad and the brake disc is too small. 2. The continuous sound may be that the bearing is broken. 3. The continuous sound may be a problem with the transmission shaft.

There are many reasons, such as bearings, brake disc friction, tire wear, balance rod ball joints and shock absorbers and other problems will produce abnormal noise, what is the specific problem must be checked by professionals before it can be judged, you can go to the 4S shop to check it clearly, safety first.

What is the reason for the abnormal noise in the front wheels of the car.

If it is a new car, the new car disc and disc are in a run-in state, which leads to a variety of reasons for abnormal brake noise, rust in water, stones stuck in the middle of the disc and disc, and large metal particles in the brake pad. It doesn't matter as long as it doesn't affect the performance of the brakes.

What is the cause of the abnormal noise at the left front wheel? What is the cause of the abnormal noise at the left front wheel? The following are the causes and solutions to the abnormal noise at the left front wheel

1. Foreign objects on the brake disc: If the brake disc adsorbs foreign objects such as sand, gravel, soil, etc., the friction between the foreign objects will cause abnormal noise. Removal of foreign bodies can be resolved.

2. Deformation of the left front wheel tire: The car often walks on bumpy roads or high-speed roads through potholes, which will cause the front wheel to deform, resulting in abnormal noise. Tires need to be replaced.

3. Left front tire wear: When the left front tire is worn excessively, or nails, stones, etc., there will be abnormal noise. Check it out at the repair shop.

4. Serious wear of brake pads: When the brake pads are worn below 6mm, the tires will have abnormal noise. Brake pads need to be replaced.

Abnormal wheel noise: Abnormal wheel noise is likely to be caused by untimely maintenance of the vehicle, or often driving on bad roads, resulting in uneven wear of tires, and serious wear of tire bearings.

It is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones are imitation abnormal noises. When I went to the repair shop to inspect the vehicles on the abnormal noise bridge tour, only nearly 20% of the cars really had problems. Models equipped with turbocharged engines are different; Models with engine guards may also make noises due to friction; After some car owners come into contact with different cars, it is likely that due to their lack of understanding of mechanical knowledge, they mistake reasonable abnormal noise as a vehicle failure.

Therefore, learn to distinguish the abnormal noise of the car and avoid wasting time and energy.

Second, the identification method of car noise:

In practice, due to the limitations of working conditions, it is difficult to measure the sound of the car with special instruments, and the sound of the car can only be described and compared with the judgment of the sound in daily life. For example, the "rattle" sound caused by the dry friction of the bearing, and the "click" sound similar to the small hammer hitting the cement floor caused by the excessive valve clearance.

1. Correctly distinguish between normal and abnormal sounds.

The vibration of each mechanism in the work of the car will emit a variety of sounds, but the sound does not mean that the car is faulty, in order to avoid unnecessary disassembly, we must first distinguish between normal sound and abnormal noise. The normal vibration sound of each system component (such as the noise on the surface of the engine), the impact sound of the gear when shifting, the air intake sound and exhaust sound of using gas as the working source, and the gear meshing noise are all normal sounds. Abnormal noise (abnormal noise) can be divided into slight noise, general noise and malignant noise according to the impact on the performance of the car.

Slight noise, such as the flashover sound of high-voltage electric leakage, the slight loose sound of rolling bearings, etc., the general volume is small, the degree of wear of the parts is not large, and there is no significant change for a long time, and this kind of fault can still maintain the normal operation of the car without repair.

3. When diagnosing abnormal noise, attention should be paid to creating good auscultation conditions and trying to eliminate the interference of other noises, so as not to affect the accuracy of judgment.

It is best to consciously amplify or reduce the sound, that is, to use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or to reduce the sound by using a single cylinder fire cut-off to meet the needs of diagnosis. The auscultation site should be kept quiet to minimize human interference.

What is the cause of the abnormal noise of the left rear wheel? What is the cause of the abnormal noise of the left rear wheel? The abnormal sound of the left rear wheel is generally mixed with fine stones in the brake disc, resulting in abnormal friction noise during driving; or caused by abnormal wear of tire bearings, due to lack of oil or fatigue wear

1. Check the tires at any time every day, and regularly remove the habit of foreign bodies in the tires, when the vehicle is driving on the road, there are often some stones squeezed into the tread cracks of the tires, if these small stones are not removed in time, the defense will puncture the tires for a long time, resulting in air leakage or punctures; 2. The driver is diligent in checking the surface of the tire to ensure the cleanliness of the tire. In particular, it is necessary to focus on cleaning the tires, such as carrying the opening of the fruit tire surface is covered with mud, which is easy to cover up the scars of the tread, cleaning is to check whether the tire has sediment, cuts, bulges and other conditions, if the tire is found to be cracked, it should be replaced immediately as soon as possible; 3. The service life of automobile tires is generally 2-3 years or about 6-100,000 kilometers, and the tires should be replaced immediately when the tread depth is in place, and the overall performance of tires that exceed the shelf life has declined. @2019