What happens when the car starts with an abnormal starter?

The abnormal starter noise when the car starts can be caused by the following reasons:

1. The carbon brush inside the starting motor is faulty.

2. The gap between the hydraulic support inside the engine cylinder head and the valve is too large.

3. Abnormal sound of engine belt. Including booster belts, generator belts, etc., the belt is aging or too loose or too tight, which will produce abnormal noise.

4. The screws of the lower guard plate of the engine are loose. When the engine guard screws are loose, it will also make an abnormal noise when starting.

What kind of squeaky noise? Which part? Motor? Diesel engine? Can it be spindled? ......

Do you want to list all the abnormal noises that can occur?

Is it a clack-clad sound, just a few seconds, and it's loud overnight.

After the car starts, the abnormal engine noise may be caused by engine throttle carbon deposits, exhaust system blockage, spark plug failure, etc., the specific analysis is as follows: engine throttle carbon deposits: poor fuel quality, valve seal leakage, incomplete fuel combustion, ** system failure and oil absorption.

Exhaust system blockage: If the vehicle uses leaded low-quality gasoline for a long time, the three-way catalytic finger and DPF will be poisoned and blocked, and the exhaust pipe will also be blocked. Spark plug failure:

There are sedimentary deposits on the spark plugs, and black deposits on and inside the spark plug electrodes, indicating that the mixture in the cylinder is too thick, the spark plug is ablated, and the top of the insulator is cracked.

The reasons for the buzzing of the automobile engine are: 1. The oil needs to be changed or the viscosity of the engine oil does not match; 2. The oil is not fully lubricated to all parts of the engine; 3. The gap between engine wear and tear becomes larger; 4. Excessive carbon deposition in the engine, throttle and spark plug; 5. The air filter is too dirty. The engine is a device that provides power for the car, and the heat energy of gasoline and diesel fuel is converted into mechanical energy by expanding the gas after combustion in the sealed cylinder, pushing the piston to do work, and its composition is as follows:

Friend sales 1, gas distribution mechanism; 2. a crank connecting rod mechanism; 3. The ignition system has a good reputation; 4. a cooling system; 5. a lubrication system; 6. starting the system; 7. Supply system.

There are generally two old reasons for the sound of sizzling after the engine starts: 1. If the car does not move for a long time, the oil will return to the oil pan at this time, and the valve will lack the sealing and lubrication of the oil when the vehicle starts. 2. If the abnormal sound made by the belt when starting, it is necessary to check whether the belt has a problem in time.

The following is the solution to the abnormal sound of the belt:,1. If there is an abnormal sound of the belt, first check the assembly, this abnormal sound may be the friction between the timing belt and the timing bridge shell, you can loosen the screw on the formal shell for half a circle to observe whether the abnormal sound disappears. 2. Secondly, you can check the use of the generator belt, it may be the abnormal noise caused by the accessory belt, the tightness of the timing transmission part is adjusted too tightly, and the power generation and air conditioning booster belt are removed to eliminate whether the problem is caused by these two belts.

3. There is a problem with the timing belt tensioner, which usually needs to be replaced with the timing belt, which may be the sound caused by the individual bearing problems of the engine, and it is necessary to carefully identify the specific sound of the sound.

When starting the vehicle, the reasons for the abnormal sound of the starter are the early connection of the main contact of the electromagnetic switch, the poor contact of the electromagnetic switch, and the inseparable separation of the driving gear. The main contact of the solenoid switch is connected early: when the starter driving gear has not had time to engage with the flywheel gear ring, the starter makes an abnormal sound.

Poor contact of solenoid switch: The rotor collides with the naïve attitude pole, the brush wear is too limited, and the contact of the solenoid switch is poor, so it is necessary to check whether there is a problem with the following lines of the car. The drive gear gear is inseparable from:

The drive gear is inseparable and runs non-stop. After disconnecting the ignition switch and cutting off the power supply, the starter is still running, and the engine starts to scream. One of the reasons for the abnormal sound of the car start includes the failure of the gearbox, which causes the internal gears to be rubbed and produce abnormal noise, which is more complicated and needs to be checked by professionals in the repair shop or 4S shop.

When the clutch release bearing is damaged, the clutch plate cannot be completely disengaged, which eventually leads to an abnormal sound during acceleration.

On the issue of abnormal noise of automobiles, it is difficult for ordinary car owners to distinguish which ones are abnormal noises and which ones are reasonable abnormal noises. Only nearly 20% of the vehicles that went to the repair shop to detect abnormal noises really had problems. In the case of a turbocharged engine, there is a must be a difference between the sound and the sound of a naturally aspirated engine; Models with engine guards may also make noises due to friction; After some pure brother car owners come into contact with different cars, it is likely that they lack their own understanding of mechanical knowledge, so they can distinguish the abnormal noise of the car and avoid wasting time and energy.

Second, the car sound of the old and dry method:

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, use a screw or other metal rod as a stestological instrument to contact the sound part to amplify the sound, or use a single cylinder fire cut-off to reduce the sound to meet the diagnostic needs. The auscultation site should be kept quiet to minimize human interference.

When starting the vehicle, the reasons for the abnormal sound of the starter are the electromagnetic switch, the main touch of the main touch, the early connection, the poor contact of the electromagnetic switch, and the inseparable driving gear. The main contact of the solenoid switch is connected earlier: when the driving gear of the starter has not had time to engage with the flywheel ring gear, the starter makes an abnormal sound.

Poor contact of the solenoid switch: collision with the magnetic pole of the rotor, excessive wear of the brush, poor contact of the solenoid switch, at this time, you need to check whether there is a problem with the following lines. The drive gear cannot be separated:

The transmission gears are inseparable and run all the time. Guan Zhen lacks an ignition switch, and after cutting off the power supply, the starter is still running, and the engine makes a screeching sound after starting. One of the causes of abnormal starting noise of a car includes a malfunction of the gearbox, which causes the gears in the gearbox to rub and produce abnormal noise.

This situation is more complicated, you need to go to the repair shop or 4S shop to find a professional to check.