During the process of starting the engine, there should be no grinding noise coming from the starter; the "thump" of the engine at idle is uniform and there is no abnormal noise. Lightly press the accelerator and allow the engine speed to increase slowly. There should be no noise in the process. Press the gas pedal quickly and the sound of the engine power increasing should be smooth and without lag. Find a suitable place and drive the vehicle under complex road conditions for 5-10 minutes after stopping, the idle speed should still be stable at the original idle speed, and the sound should be stable and uniform.
There is an abnormal noise in the engine
Explanation of symptoms: Abnormal noise is more likely to occur in the engine compartment. Most people judge this to be an abnormal noise in the engine compartment. depending on the sound source, it can usually be a metallic screech or hiss.
Problem Analysis: Abnormal noise coming from the engine compartment will include a loud whistling sound from the belt, which is usually caused by belt slippage. There will also be a sharp sound of dry rubbing of metal parts when the engine is running, which is usually due to damage to the bearings of the generator, water pump, and power steering pump. If the sound of air leaking is caused by the engine running, it may be the result of a blocked engine; exhaust system, vacuum tube leak or rupture.
Why does the roar of the car engine become louder?
1. Abnormal noises in the car body
Abnormal noises in the car body are the most common. , generally because the rigidity of the body is not sufficient. Intense long-term drivingerm or intensive driving on bumpy roads will cause slight deformation of the steel frame of the car body. The most direct impact is abnormal impact or friction between the door and the bodywork. car, or abnormal friction in some welding or screw parts, or it may cause abnormal noise; some cars have more wind noise, which is related to some extent to the shape of the car;
Solution:
These abnormal noises aren't terrible and won't have a big impact on the vehicle's overall performance, but they are annoying to deal with and difficult to cure. can only be caused by abnormal conditions. Add rubber pads or sponges to areas of friction or impact.
2. Abnormal noises in the car
Abnormal noises in the car are the most common, and there are many places where abnormal noises occur, such asimproperly installed decorative panels and co-driver's glove box Loosening, impact seat belt buckle, etc.
Solution:
Reset it automatically or fill it with soft objects.
3. Abnormal brake noise
If there is a “squealing” sound when applying the brakes, it is most likely caused by excessive wear of the brake pads, resulting in excessive gaps. Of course, improper use or deformation of the brake disc material, as well as unqualified hardness, porosity, friction characteristics and compression characteristics of the brake pads may cause abnormal noise.
Generally speaking, the lifespan of front brake pads is 30,000 kilometers and that of rear brake pads is 120,000 kilometers.
Solution:
Abnormal brake noise can usually be resolved by replacing the brake pads. Ifthe brake disc is damaged, it must also be replaced. When replacing, be careful. Model and other issues, otherwise the disparity will always persist. There will be an abnormal noise.
4. Abnormal suspension noise
The suspension system always maintains continuous operation while driving. Loss will definitely occur. When the ring ages or falls off, abnormal metal impact sounds will be heard. If the shock absorber is broken, a “dong dong” or “click” sound will be heard on bumpy roads.
Solution:
Generally, abnormal suspension noise cannot be solved by yourself. You need to go to a repair shop or 4S workshop to have a specialized master replace the parts. If this occurs, it must be resolved as quickly as possible. It is best to reinforce inspections during daily maintenance to avoid the appearance of abnormal noise.evils.
5. Abnormal noise from tires
Abnormal noise caused by tires is generally tire noise. The noise generated will also depend on the car's driving speed, tire type, tire pressure and road surface. conditions, etc. Factors produce various noises of different strengths and weaknesses. When there is a faint “pop” noise, it is mainly due to tire tread deformation, bagging, heavy wear, or insufficient air pressure. If there is a “clicking” sound, the tread may be mixed with small stones or nails. .
If the wheels make a collision and metallic friction noise while driving, it is likely that the shock absorbers and bearings are damaged. Car owners should be careful when encountering these problems, even just driving nails can beand dangerous.
Solution:
If you find that the tread is mixed with small stones, you can clean it yourself. Other issues should be brought to the attention of the car owner and handled by professionals.
6. Abnormal noise from steering wheel
Abnormal noise will be detected when the steering wheel is turned left and right. When an abnormal noise occurs halfway, it may be. essentially considered an abnormal noise coming from the steering gear. While it is difficult to determine the source of the abnormal noise after the steering wheel is rotated, the most common response obtained when going to a 4S store for testing is friction of the steering wheel rubber sleeve. the steering rod ball joint.
In addition, abnormal noises may also be caused by oil leakage from the steering gear jacket, insufficient tightening of the power assist beltor aging.
Solution:
The tie rod ball joint is getting old and the steering gear has problems and needs to be replaced in time.
7. Abnormal noises in the engine compartment
The situation of abnormal noises in the engine compartment is complicated and requires careful investigation.
If the belt squeaks or whistles, it is usually due to belt slippage. If it is an air leak noise, it may be caused by a blockage or breakage in the exhaust system or vacuum tubes; If there is friction and abnormal noise from external metal parts when the engine is running, this can usually be caused by damage to the generator, water pump, etc.
Solution:
Find a professional to repair it as soon as possible
8 Abnormal noise in the gearbox
If the gearbox gear is broken. is moving while the car is driving If there is a “rustling” inside and a whistling sound when changing gears, this may be caused by worn gearbox bearings or gears or rolling points.
If the gearbox makes an abnormal noise when accelerating and changing gears, the gearbox oil may contain metal powder, indicating excessive gear wear. the brake belt of the gearbox, clutch and other components.
Solution:
The gearbox is precision equipment, so no matter what abnormal noise occurs, it should be repaired in time.
I hope to adopt him!
Starting ZhijunWhat is the reason for the squeaking noise when starting the machine?
There are two possibilities.
First, if too much engine oil is added, the instantaneous working resistance of the engine will increase, which will increase the rotational resistance of the crankshaft whichn and will reduce the power output of the engine. escape into the combustion chamber and participate in combustion. The result is that the vehicle burning engine oil and emitting blue smoke will increase fuel consumption.
Second, the engine oil model is wrong. For example, it used to be fully synthetic, but now it has been replaced by mineral oil, so to change the engine oil, you need to go to a regular store and replace it with original engine oil . Counterfeit or substandard engine oil will lead to serious consequences. engine damage. If you add the type of engine oil recommended in the service manual, there will be virtually no problems.
After replacing the timing belt yesterday, the car made a whistling noise while driving. I don't know what's going on?
Hello, your situation may be caused by the fact that theWater pump, generator or booster pump belt is too loose or aged. Check if the belt is too loose and tighten it. If she's old, she must be. replaced. , I am happy to answer your questions, I hope this can help you, and I wish you good use of the car! If you have a problem with your car, ask the auto guru. Professional technicians from 4S stores can solve the problem within 10 minutes.
There are many reasons why a car still makes an abnormal noise after replacing the timing belt. Common reasons are: 1. If abnormal noise occurs, check the assembly first. Abnormal noise may be caused by friction between elements. timing belt and timing case. If this happens, you can loosen the screws on the formal shell a half turn to see if the sound anormal disappears. 2. Secondly, you can check the generator belt usage. It may be an abnormal noise caused by the accessory belt. 3. The sealing of the timing transmission part is too tight. Remove the power generation and air conditioning belts to rule out if the problem is caused by these two belts. 4. There is a problem with the timing belt tensioner and it usually needs to be replaced along with the timing belt. The noise may be caused by a problem with some of the motor bearings. You must carefully identify the specific source of the sound~~