What s going on when the new car ignites very loudly, and why does the car click when it is successf

First, it is a problem of valve clearance, you go and adjust the valve clearance.

Operation method: measured by feeler gauge, the valve clearance of each car is different, the general is the intake valve, the exhaust is around! When the engine is working, the valves will expand due to the increase in temperature.

If there is no gap between the valve and its transmission parts in the cold state or the gap is too small, then in the hot state, the thermal expansion of the valve and its transmission parts will inevitably cause the valve to close loosely, resulting in the engine leakage in the compression stroke and power stroke, so that the power decreases, and it is even difficult to start in serious cases. In order to eliminate this phenomenon, a certain gap is usually left in the valve and its transmission mechanism when the engine is assembled in the cold state to compensate for the expansion of the valve after heating.

When designing the valve mechanism, there is a certain gap between the tail end of the intake and exhaust valve stem and the adjustment screw on the tappet (or rocker arm), which is the valve clearance. As shown below:

Second, the following aspects need to be checked.

1. When the belt is cold, it is hard or the belt is a little loose, tighten it, and the friction between the tensioner wheel makes a sound, and when it sounds, spray it with rust remover, and it will not sound immediately.

2. The lubricating oil in the bearing does not flow, and the ball is short of oil to lubricate after rolling. If the sound of the direction is obvious, it is recommended that you check whether the booster oil is lacking, and check the steering oil circuit system such as the assistant pump and the steering pressure limiting valve and oil return valve.

The sound of the starter starting, normal.

It shows that the starter one-way clutch is not well returned and makes a loud sound. The starter work is completed at the moment of successful ignition, and the meshing gear should be retracted immediately. It is advisable to check the starter.

The sound of the starter retracting the moment.

It may be because the battery is dead, and the squeak is the sound made by the starter。If you encounter this situation, you can call ** to a friend who drives, so that you can start the engine. The battery is a very important component of the car, and when it is not started, the battery powers the electronics of the vehicle.

The battery is also responsible for starting the engine. After starting the engine, the generator supplies power to the vehicle's electronics, and the generator also charges the battery. If the battery is not working, the engine will not start.

Batteries are consumable parts that need to be replaced regularly. The batteries on a car generally last 3 to 4 years, and some batteries with better performance can last longer. But the battery of some cars has not been used for so long and will not work, which is caused by the owner's incorrect use habits.

When the engine is not started, do not sit in the car for a long time to use electronic devices, this will reduce the life of the battery, which is not good for the battery. When using the car in winter, try to avoid parking the car outside at night, as the outdoor temperature is very low in winter, which will also reduce the service life of the battery. When using the car in ordinary times, if you avoid some incorrect use habits, you can prolong the service life of the battery.

If the battery is not good, replace it in time, otherwise it will affect your car.

The car can turn on the headlights or interior lights before confirming the start, and observe whether the lighting changes brightly or darkly during the start-up process. If it is visibly dimmed, it means that the battery voltage is insufficient. The current consumption at the moment of start-up is very large.

When the battery is underpowered, the starter is unable to drive the engine to reach the starting speed, and the repeated engagement of the magnetic pack and the starter relay produces the sound of Dada.

If the car battery voltage is too low or malfunctioning, the battery life is generally 3 to 5 years if the car is not used properly on a daily basis. If this period is exceeded, it should be replaced in a timely manner. The fuel supply of the fuel system is insufficient, and the mixture air-fuel ratio required by the engine cannot be reached, check whether the fuel is sufficient.

Excessive carbon deposits in the intake pipe, throttle valve, and idle motor make the engine mixture unable to achieve the required air-fuel ratio. Check that idling and poor car environments accelerate carbon production. A faulty starter motor or associated wiring causes the magnetic coil to remain engaged and provide the torque required for start-up.

The ignition system failure caused the engine to fail, the key door was always on the starting gear, and the starting relay was repeatedly sucked and clicked。Temporary solutions to the car that can't burn Prepare two lines to energize the other car: first extinguish the engine of the non-electric car, the lines must be connected in order, otherwise there is a danger of short circuit, one end is connected to the positive terminal of the battery, and the other end is connected to the positive terminal of the battery; Take the other wire battery negative and connect the other end to the engine casing or body of the non-electric vehicle.

It should be noted that during the wiring process, no other places should be encountered. Once wired, start the powered vehicle and then the non-electric vehicle. Finally, the order in which the stitches are removed is exactly the opposite of the order in which the wiring is wired.

To be on the safe side, it is important to do things in order.

It may be that the battery is out of power, you can borrow the battery of another car or find a charger to charge the battery, of course, you can also take the way of pushing the car, as long as the car starts to move, the battery will be charged, and the battery will be charged to solve the battery power loss.

It may be that the battery is dead, it may be that the engine is faulty, it may be that the oil circuit is blocked, it may be that the pipeline is loose and there is an oil leak.

It could be that the car's motor is malfunctioning, or the car's gasoline is exposed, or there may be a problem with the car's ignition system.

There is an abnormal sound at the moment of the car ignition, and there are different reasons depending on what the abnormal noise sounds like. The following is a list of some of the sound patterns of the car ignition at the moment, if you can also hear these sounds when your car starts, you can roughly know which parts are wrong.

1. There is a sharp chirping sound when the car is ignited.

This chirping noise is caused by belt slippage, which may be due to insufficient preload of the tensioner, or it may be that the belt has been used for too long and is stretched and not tight enough.

Normal belts and tensioners, the hand twists the belt with a little force, and the belt will not be twisted more than 90 degrees. If the belt can be screwed 90 degrees with a little force, it means that the belt or tensioner wheel is loose.

2. There is a clattering sound when the car is ignited.

This sound is caused by the gear teeth on the starter gear and the engine flywheel, because the starter and the flywheel are used many times and the gear is worn for a long time, resulting in the sound of tooth misalignment.

3. There is a clattering sound when the car is ignited.

This sound may be the valve closure sound of the engine's valve mechanism, which is the most noisy in an engine. This sound is the sound made when the intake and exhaust valves are closed, and it can generally be heard after starting. Of course, it is also possible that the spark plug is jumping into flame.

4. There is a rattling metal friction sound at the moment of the car ignition.

This sound is probably due to the fact that the vehicle has been parked for a long time, causing the oil to flow back into the oil pan. The sound of metal grinding caused by the lack of adequate lubrication of all parts at the moment of engine start-up disappears when the oil pressure rises.

5. There was a snort when the car was ignited.

If the snort is similar to the feeling when you turn on the faucet, then it is the sound of the car's gasoline pump starting to work. The car's gasoline pump will remain in operation for a few seconds after the last ignition is turned off, allowing the fuel line to maintain a certain oil pressure for the next start. The next time it starts, the fuel pump starts to increase the pressure on the fuel, but because there is already a certain amount of pressure in the oil line at this time, the pressure will be too high.

At this time, the pressure relief valve is opened to reduce the pressure, and there will be a snort.

There is an abnormal sound when the car is ignited, and the vehicle can be started normally, which may be due to the following reasons: 1. The sound of the timing chain. 2. Insufficient lubrication during cold start, friction sound of metal parts.

3. The sound produced by the motor belt slipping when the cold car starts.

You can look at the tightness of the motor belt to see if there is any aging.

4. The starter is not well returned.

There is an abnormal sound when the car is ignited, the sound is "da-da-da", and the vehicle cannot be started normally, the most common reason is that there is a problem with the battery envy fiber.

Either the battery is out of power, or the life of the battery has expired.

For example, when parking, you forget to turn off the headlights, or the electrical appliances in the car are not turned off, resulting in a power loss.

Again, if the battery has not been replaced for four or five years, it can be basically determined that the life of the battery has reached the limit, because the normal life of a battery is about four years.

In this case, the battery needs to be replaced.

Since you can't see the actual car, you can't make an accurate judgment.

It is recommended to go to a 4S shop or a professional auto repair shop in time, and let the technician check it, determine the problem, and then repair the symptoms.

Millions of imitation car subsidies.

The following are the main reasons for the abnormal sound at the moment of successful ignition of the car: 1. The clutch is not stepped on correctly: the gear is hung on the gear and the clutch is not stepped on in place.

2. Slippage of the starter: Caused by the slippage of the starter of the car at the moment of ignition. 3. The ignition time is too long

The ignition time is too long, and the moment the ignition is successful, the flywheel hits the starter gear. 4. Belt slippage: When the ignition starts, it is also possible that the belt slips and causes the vehicle to make abnormal noise, but this situation will generally disappear after the engine belt speed rises.

Note: For the above reasons, it is recommended to go to the repair shop as soon as possible to check, otherwise it will affect the service life of the vehicle.

Automobile squeak includes engine squeak, clutch squeeze, transmission squeak, final drive squeak, suspension system squeak, brake squeak, steering squeak and body squeak.

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. 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 delay sound and malignant sound 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 the abnormal noise of the car, 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.

In this case, if the car does not start for the first time after a long time, it is a normal phenomenon, but the car has a sound after ignition, which is likely to be a problem with the engine belt and needs to be checked.

First of all, if the car does not move for a period of time, then the oil will return to the oil pan, which means that the top of the engine, that is, the valve chamber, will be less oil, because the valve lacks the sealing and lubrication of the oil, so when the car just starts, you will hear the sound of the bottom of the car, which is a normal situation.

However, in addition to the normal situation, there is a high probability that the engine belt is a problem if the car is started and there is a sizzling noise. First, check the tightness of the engine belt, we can try to clamp the transmission belt with our fingers, and then twist it, note that the operation should be carried out when the engine is cool, and the twist angle should generally be below 90 degrees, otherwise it will be adjusted.

It can be said that when the car is lighted, the belt sizzles and sizzles, which may indicate to you that the belt needs to be replaced.

Photo by Zhang Huangbin of Pacific Automobile Network).