What is the abnormal sound after Ruiou cleans the ternary?

According to the above-mentioned vehicle use phenomenon, combined with the maintenance part and vehicle condition, from the perspective of maintenance cases, this sound nature of the case is mostly the phenomenon of poor bearing lubrication, such as belt tensioner, belt performance, etc., otherwise it will be replaced. In addition, this kind of fault should also be checked on the chassis, such as the exhaust pipe support bottom resonance, the engine lower guard plate is loose, etc., otherwise it can be corrected or tightened. Secondly, combined with maintenance, it is recommended to analyze the engine speed change, so as to judge the performance of the three-way catalytic converter after cleaning, if the engine speed value increases, the sound comes from the chassis or the sound nature changes, such as some noise on the basis of the normal "buzz", such as "bang" or stuffy, it means that the three-way catalytic converter has a problem, and it can be disassembled and checked, otherwise it will be replaced.

Hello, check if something is not installed [There is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Abnormal noise in the engine compartment.

Solution: Send it to the factory for maintenance.

Abnormal engine noise indicates that the technical status of a certain mechanism of the engine has changed. It is mainly caused by excessive wear and tear of some parts or improper assembly and adjustment. Some abnormal noises can still predict that the engine will be damaged accidentally, so when the engine has abnormal noise, it should be repaired in time to prevent the fault from expanding.

Before dismantling, it is necessary to carry out an inspection to preliminarily determine the location of the fault, and then the analysis of the abnormal noise characteristics of the engine can basically diagnose the location, cause and degree of abnormal noise, and avoid the blindness of dismantling.

There is a high probability of abnormal noises here. The whistling sound of the belt is more harsh, which is usually caused by the belt slipping. If there is a sound of dry friction of metal parts on the outside of the engine when it is running, it is generally a manifestation of damage to the bearings of the generator, water pump, and power steering pump.

If the engine is leaking, it may be a blockage in the exhaust system, a leak or a break in the vacuum tube. It should be reminded that if it is an abnormal noise in the engine, most of the owners will not be able to solve it, and it is best to send it to the factory for maintenance.

Gearbox squeaks.

Solution: You should go to the 4S store for a comprehensive inspection.

If there is a "rustle" sound inside the gearbox while the car is driving, and it disappears after stepping on the clutch, it means that the noise** is a transmission failure, which may be caused by the wear of the gearbox bearings or gears and bearing spots.

The engine is basically normal when the car is cold, and the cylinder is knocked when the car is hot.

When it comes to this kind of failure, some people may think that it is somewhat contradictory to the abnormal sound of the first piston knocking cylinder, but in fact, it is clear after careful analysis. We know that as the engine temperature increases, so does the combustion rate of the mixture. If the ignition time is too early, the highest point of the cylinder combustion pressure will be advanced, and the force of striking the cylinder wall will increase, resulting in abnormal knocking sound.

The following describes and how to check for such faults.

1) Check the fuel label used, low-grade gasoline is prone to deflagration.

2) Check the engine temperature. If the engine temperature is too high, the combustion rate and combustion pressure in the combustion chamber will rise, resulting in deflagration.

3) Check the ignition timing, too early ignition time will advance the combustion pressure point, resulting in knocking the cylinder. For the electronic control ignition system, the relevant signals of the control ignition timing should be checked, such as throttle position sensor, intake pressure sensor, knock sensor, air flow sensor and water temperature sensor, etc., and the timing lamp and computer detector should also be used to check the ignition timing angle. Here we will focus on the examination of the signal from the knock sensor (Figure 6).

As we all know, the engine equipped with a detonation sensor, when accelerating, the detonation sensor will transmit the detonation signal to the engine computer in time according to the deflagration situation, and the computer will adjust the ignition timing accordingly according to the detonation signal. If the knock sensor fails or the engine knock signal is not fed back to the computer in time, the engine ignition time will be advanced, resulting in a knocking noise.

4) Check the air-fuel ratio of the engine mixture, that is, the CO content in the exhaust. Because, if the engine mixture is too thick, under the same working conditions, the ignition time will be relatively early, the combustion rate of the mixture in the cylinder will be accelerated, and the pressure in the cylinder combustion chamber will rise too fast, which will also produce detonation and abnormal noise. In this case, it is important to check the oxygen sensor, air flow meter, inlet pressure sensor and oil pressure regulator.

5) Check whether the negative grounding wire of the engine is well connected. Some models of engine knock sensor and oxygen sensor are grounded by the shell, when the engine grounding wire is poorly grounded, these two signals can not be transmitted normally, and will also cause engine knocking noise.

6) Check the carbon deposits in the combustion chamber of the engine. In long-term operation of the engine, a large amount of carbon deposits will gradually form in the combustion chamber, and because the carbon deposits occupy the space of the combustion chamber, it will cause the increase of the compression ratio of the engine, and eventually lead to the increase of combustion temperature and pressure. At the same time, due to the adiabatic nature of the carbon deposit, when the engine is running at high speed, the carbon deposit retains the heat of the last work, and when the mixture is compressed to a certain pressure and temperature, the heat stored by the carbon deposit will ignite the mixture, forming irregular combustion, causing detonation and abnormal noise.

That is, it is often referred to as spontaneous combustion and multi-point combustion. Therefore, the carbon deposits inside the engine should be removed in time to prevent the occurrence of abnormal knocking faults.

If there is a carbon deposit on the top of the piston, a hot surface with high strength is formed, which can cause detonation. There are four reasons for this: too much carbon deposit, too early ignition, low rpm high grade, and the addition of low-grade gasoline can cause such failures.

Knocking should be repaired in time, long-term severe knocking will lead to early wear of cylinder parts, reduce the service life of the vehicle, it is recommended to go to the 4S shop for inspection as soon as possible. In addition to knocking, there may also be a lack of oil, and the oil pressure is relatively low, which is caused by friction between the valve and the duct and the hydraulic tappet. For this kind of problem, if there is no other feeling, you can use it like this first, if you deal with it, you should also disassemble the cylinder head, and the actual significance is not very large, it is recommended that you start from the oil aspect, use good oil.

Hello, there may be many reasons for the abnormal noise of the engine, and the specific situation also needs to go to the 4S shop for inspection in order to take the corresponding diagnostic method [There is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

The abnormal engine noise is caused by carbon deposits in the engine cylinder, because the ignition point of carbon deposits is lower than that of gasoline, so when the piston is working, a small part of the carbon deposits will be ignited in advance, resulting in detonation and abnormal noise. Car 4S shop generally uses pickling to clear the carbon deposits in the engine, but it has some impact on the car, my car has been using a multi-way piece, it can remove the carbon deposits in the engine, and clear the oil circuit, the effect is OK, I have been using it for a year, this depends on your own choice.

If there is a "rustle" sound for the bearing abnormal sound, if there is still an abnormal sound after refueling, it means that the bearing is worn excessively, should be replaced, if it is an intermittent collision sound, it may be that there is a movement before and after the separation bearing, and the replacement is the separation bearing return spring. In addition, except for starting, shifting and low-speed braking, you need to press the clutch pedal to the end, do not step on the clutch pedal or half-belt clutch at other times, otherwise it will accelerate the wear of the clutch friction plate and pressure plate, resulting in failure such as annealing of the clutch compression spring.

Clutch daily maintenance:

The control of the clutch should be done: one fast, two slow, three linkage at the beginning of the pedal lifting fast lifting, when the clutch appears semi-linkage, the speed of the pedal lifting is slightly slower, from the linkage to the complete combination of the process, the pedal is slowly lifted. While the clutch pedal is raised, gradually press the accelerator pedal according to the amount of engine resistance to make the car start smoothly.

Precautions: 1. When the friction plate, driving plate and pressure plate in the clutch are stained with oil or rust, they should be dismantled to remove or oil stains, cleaned with gasoline or kerosene, dried and installed.

2. If the friction plate exposes the rivet head, cracks, large area of scorching, and the wear thickness is less than millimeters, remember to replace it.

3. After cleaning or replacing the clutch bearing, apply an appropriate amount of butter, and pay attention not to install the dust cover, otherwise there will be slippage.

4. Regularly check all the connecting bolts on the clutch, and lubricate the clutch pedal shaft according to the regulations.

He Weijun. Could you please describe the specific situation? For example, the time when the abnormal noise occurs, whether it is when you step on it or when you lift it, the specific sound is roughly described, so that we can help you analyze the problem.

Hello engine abnormal noise is generally caused by poor internal lubrication of the engine, or, bearing damage, in this case, it is recommended that you go to the repair shop for a comprehensive inspection.

Thanks for using and hope mine can help you!

If you don't understand something, feel free to ask, and I will give you a satisfactory answer!

Go to the repair shop to check and check.

Analyze the position specifically and prescribe the right medicine.

If there is a metal friction sound when the clutch is pressed, it may be due to the loosening of the rivets connecting the driven disc to the spline, or the abnormal sound caused by the cracking of the steel plate of the driven disc and the breakage of the separation lever. In this case, there must be a problem with the clutch plate or pressure plate, and it is recommended that you go to a 4S shop to remove the gearbox and check it carefully.

Hello: Regarding the question you asked, this kind of failure should be caused by the decline in the performance of the shock absorber, you can replace a new pair of shock absorbers to try, there are more such accessories on the market, you can replace a pair of shock absorbers of other brands to try.

The nature of the abnormal sound during operation is not described, and the fault source cannot be judged compared to the sound of the clutch fault case. Secondly, for the braking effect, from the analysis of operating conditions, it is recommended to go to the maintenance shop to check the free stroke of the clutch to see if there is too much free travel. In addition, if this fault is operated on the second foot, if the brake pedal travel becomes smaller, it is recommended to go to the repair shop to check the exhaust of the brake system, and if there is air in the clutch cylinder, the above fault phenomenon will occur.

To sum up, it is recommended that you go to a repair shop to check the above repair recommendations.

Fault Symptom:

The user replaces the front brake disc and front brake pad in the field, and the rattling sound occurs when the brake is lightly stepped on for a short time, and the sound disappears when the brake is stepped on heavily. When the car is above 80 kilometers per hour, there is a phenomenon of shaking when the brakes are pressed.

Cause of failure: The thickness of the brake disc changes in the circumferential direction.

The brake disc is deformed or improperly assembled.

The hub is deformed or has surface defects.

There is oil on the surface of the hub and brake disc or or between them.

There is a problem with the brake friction material.

After inspection, it was found that the front brake disc was deformed and there was a quality problem with the material in the brake.

The brake disc is to improve its cooling, and if the brake disc warps under the influence of temperature, the brake ring of the brake cylinder is placed diagonally in the brake caliper, resulting in frictional noise.

The brake system is not fitted with the ABE certification mark or is not adjusted after installation, resulting in incorrect guidance of the caliper. The brake piston is suspended in the middle and cannot be fully returned. It can also cause a noise when the car is cornering.

Solution: Replace the front brake disc and brake pads and the sound disappears.

Brake pads are not good [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Your car may be caused by a lack of oil in the transmission mechanism between the steering wheel and the steering machine! It may also be caused by the aging of the "steering power seal", and it is recommended to replace the "directional oil seal repair kit". If you don't replace it for the time being, you may have nothing to do, but over time, it will ruin the oil and cause greater failures.

It is recommended that you go to your local 4S store to check it out.

Beijing China Enterprise Xinyuan Automobile Sales and Service Co., Ltd. Fiber Bulk Company.