What s going on with the noise of the car when it starts?

It may be because the belt has slipped on the generator, and the belt and the pulley are violently rubbed and vibrate, making a certain frequency of sound.

The main reason for belt slippage is belt looseness or aging, among which the factors that can lead to belt loosening are improper adjustment of belt tensioner or insufficient elasticity of belt tensioner, at this time, the tension of the belt tensioner should be adjusted first, and if there is no effect, the tensioner should be replaced.

Belt aging mainly refers to the gradual hardening and loss of elasticity of the belt during long-term use, and the friction between the belt and the pulley is reduced.

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.

Precautions for starting the car.

Mastering the correct ignition method and developing good starting habits are the most important things that car owners should pay attention to. Generally, the correct ignition method is: after inserting the key, rotate the key to ACC and stop, after 2-3 seconds, wait until the main power relay contacts are firmly in contact, so that the first part of the period is energized.

Then turn the key to the ON place, wait for another 6-10 seconds, let the oil pump relay engage, wait for the adjustment status of each sensor to complete, turn the key to the start to the engine after continuous operation and return to the ON place, under the guidance of the computer, automatically adjust the best position and the best parameters, and finally start the engine successfully.

It's the belt slipping and whistling. The sound of the engine belt is just starting, and the direction is the power pump belt. If it needs to be repaired, it will greatly reduce the life of the belt.

1. If the belt is too loose, just tighten it.

2. The quality of the belt is not good and the tightness cannot be maintained.

There are three reasons for the noise when the car starts: loose bolts on the frame, loose or aging belts, and the car has not started for a long time.

1. Loose bolts of the base: The bolts of the base are loose, resulting in the engine support not being installed properly.

2. The belt is loose or the belt is aging: if you find this kind of problem, you can try to repair it yourself, if the bolts of the base are loose, you can find the specific screws and tighten them, if the belt is loose or the belt is aging, you can replace a new belt.

3. The car does not start for a long time: If the car does not start for a long time, the oil will flow back to the oil pan, resulting in the lack of oil sealing and lubrication in the valve chamber, and the sound of the bottom of the car will be heard when the car starts.

Precautions when starting the car

When the car starts, you need to pay attention to the information on the dashboard of the car, check whether the tires and chassis of the car are normal, put down the handbrake before starting, warm up the car and then start the car, and drive from low gear to high gear. At present, the start button used in the car is generally a one-button start button, which is different from the traditional mechanical key ignition method.

When using the one-button start button, you need to press and hold the foot brake to start. The start button of the car is controlled by chips, with reliable performance, and the car with a one-button start function is generally equipped with an intelligent induction entry system, when the key is close to the vehicle, it can automatically open the door, so that the car start and the opening and closing of the car door are more grinding rock and easy to operate.

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 sizzling sound after the car starts, which may be a problem with the engine belt.

Check the tightness of the engine belt, you can try to clamp the transmission belt with your fingers, and then twist it, note that the operation should be carried out when the engine is cool, and the twisting angle should generally be below 90 degrees, otherwise it will have to be adjusted. When starting the engine, the gears of the starter will engage with the ring gear on the outside of the engine flywheel, and then the starter will run to drive the engine's flywheel to rotate.

The abnormal noise of the engine belt is because the belt is too dirty, and the abnormal noise can also be eliminated by cleaning it with water or lubricating it with some lubricant, but whether all models are suitable for this operation to solve it needs further analysis.

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