What s the deal with a screeching squeak when a car starts?

Hello, reasons: 1. It may be the carbon brush inside the starting motor.

There was a malfunction;

2. The engine belt has been in place for a long time.

It will age and slip, and then make a squeaky sound;

3. The engine support is not installed properly due to loose bolts of the frame.

Solution: If the bolts of the base are loose, you can find the specific screws and tighten them by yourself, if the belt is loose, or if the belt is aging, you can replace it with a new belt. If the carbon brush inside the motor fails, you must go to 4S to find a professional to deal with it, and you can't disassemble the engine by yourself.

There is a screeching sound when the engine starts, and that's the problem!

The squeak of the car when it starts is caused by a loose belt or a lack of lubricating oil in the engine bearings.

Generally speaking, this failure will cause the sound of the engine belt sliding, i.e. the belt is too loose or the belt has been aging for a long time, and there will also be a failure in the rising period! It may be that the belt is aging and torn, and the belt is too slippery! Especially when the belt feels stress, such as when the headlights are turned on and the load on the generator increases, the engine belt will feel pressure and it will slip!

The belt is too loose! The main ones are the rising wheels that can be adjusted manually. When the belt is installed, the adjustable loosening is not suitable and will make a creaking sound of herbal tea slipping!

The self-adjusting riser adjustment force is too small to give the belt more tightening force, so when the belt feels the load, the engine belt will slide!

Recently, it was found that the herbal tea creaked, the sound was harsh, and the failure disappeared after the train! What's going on and under what circumstances does it squeak, does it mean that the engine belt is slipping? Herbal tea started, don't say too much about this, it's already explained above!

The general direction, especially when the direction is in place or the direction is right, will squeak! Power pump belt slip failure! Because when the lights are turned on at night, the load of the lamp generator will become larger, and the generator belt will slide!

The most squeaky sound when the air conditioner is turned on in summer! Especially when the pressure of the air conditioner is too high, the air conditioner belt is easy to slip! In addition to the timing belt, some of the engine's external belts may slide when making this sound, and it is necessary to check the various parts of the belt linkage.

Sometimes, tight wheel bearings, fallen wheel bearings, generators, pump compressors, etc., do not have rust. Without that problem, the belt and tensioner themselves might have failed.

There is an abnormal sound of ignition, which is generally not serious, and there is a squeaky sound when driving, so it is necessary to pay attention to whether the timing belt matches the timing wheel of the matching generator. If the timing belt has just been replaced, it is necessary to consider whether the installation is correct or whether the quality and tooth shape of the timing belt are qualified, etc., and never install the goods. If the engine has a mushy smell and is very strong, it may be that the timing belt is aging, and it should be replaced.

It may be because your outer belt is loose, so there will be such a sound, and you can replace it with a new belt in time.

Answer pro! There are many problems that cause abnormal engine noise, which can be caused by carbon deposition in the engine throttle, clogged exhaust system, spark plug failure, muffler problem, cooling system failure, etc.; 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. 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.

Asking questions is the kind of tenten voice.

Question: I know, but this situation is only happening today, I want to ask what the reason is, the answer may be carbon deposits in the engine throttle, clogged exhaust system, spark plug failure, question: This car is new, less than a month.

There is a squeaking sound when it is just started, which may be because your clutch is too dead, or it may be due to the influence of engine noise.

It could be because there was a problem with the car's engine, or it could be because something else had entered the engine, which made an abnormal noise.

If you hear a "sizzle" noise while driving, and this is the engine belt.

The abnormal sound caused by the problem, because the "zizi" abnormal sound is mostly the aging of the belt group of the engine, or the belt is too loose caused by the problem of the tensioner, the friction abnormal sound, belt slippage, etc., if there is a similar "zizi" abnormal sound, then look for the major belt groups and tensioners inside the engine, such as the engine timing belt.

Generator belts, circulating water pump belts, air conditioning belts, booster pump belts, etc., and the problem that causes this abnormal noise is the abnormal sound of the engine belt, which is caused by the smooth grinding surface of the joint surface of the belt and the pulley. It usually occurs when the engine speed changes rapidly, and sometimes the belt rings when the load on the attachment driven by the belt increases.

How to solve the problem of abnormal noise of engine belt.

1. Check whether the accessories driven by the belt are damaged, stuck, loose or the power of the accessories has increased.

2. Replace the belt, or use 100 gauze to polish the joint surface of the pulley and the belt (light grinding is fine).

3. The temporary solution can be to drop 1 2 drops of engine oil on the joint surface of the belt and the pulley (it will not affect the belt slippage).

If you want to judge that the belt is a good way is to drip oil on the belt, if the generator belt rings and the headlights are turned on more obviously, you have to take off the generator belt, turn the motor pulley, see if the generator rotates smoothly, if the generator is normal, you can check whether the battery is not stored power, because the battery storage is not good will increase the load of the generator.

1. Fault phenomenon:

The wheels make a screeching sound of metal rubbing as they travel.

Second, the cause of the failure:

1. It may be that the brake disc has hard spots.

2. The brake separation pump is broken, and the caliper cannot be separated from the brake disc.

3. Excessive wear of brake pads causes grinding iron.

3. Solution:

1. If you step on the brake, you can grind it off, just use it, and the brake pads contain a lot of metal.

2. Replace the brake cylinder to restore the brake to normal.

3. Replacing the brake pads can be solved, and the brake disc should be replaced if the wear is serious.

Open the nose cover and observe, if there is a sound of metal wear, it is suspected that the bearing of the rotating part is aging and damaged. If the sound disappears after the car is warmed, it may be that your oil is aging and the parts are oil-free after parking. If there is a sound all the time after starting, and the driving is weak, it is suspected that the piston ring is broken.

If the sound is between the external motor and the fan, it is suspected that the engine drive belt is damaged.

In short, in this case, you should stop the car as soon as possible and tow it to the car dealer for inspection and repair, otherwise, it may lead to a greater failure.

The abnormal sound emitted by the belt when starting, in this case, it is necessary to check whether there is a problem with the belt in time.

If there is an abnormal sound of the belt, first check the assembly, this abnormal sound may be caused by the friction between the timing belt and the timing shell, you can loosen the screw on the formal shell for half a turn to observe whether the abnormal sound disappears.

Secondly, you can check the use of the generator belt, which may be the abnormal noise caused by the accessory belt.

If the noise occasionally comes from the engine compartment, open the front cover to check carefully for foreign objects, sometimes foreign body blockages will cause the vehicle to squeak, be sure to check it carefully, and develop the habit of checking the engine compartment frequently. If the vehicle is driving, there is a sizzling sound as soon as the brakes are stepped on, indicating that the brake pads are worn to the limit and have begun to grind to the brake disc, so you should go to the repair shop for maintenance as soon as possible.

There is a screeching sound when the engine starts, and that's the problem!

Timing belts belong to rubber parts, and with the increase of engine working time, timing belts and timing belt accessories, such as timing belt tensioners, timing belt tensioners and water pumps, will wear or age.

Therefore, all engines equipped with timing belts, manufacturers will have strict requirements, regularly replace timing belts and accessories within the specified cycle, and the replacement cycle is different with the structure of the engine, generally when the vehicle travels to 610,000 kilometers should be replaced.

The specific replacement cycle should be subject to the instructions in the maintenance manual of the vehicle. Timing belts are generally considered to be replaced at 80,000 km. Even if you have a timing belt in your car, you can't replace it if it breaks.

Summary. This sound is mainly the belt of this generator, after a long time, the belt wear is relatively large, or there will be this sound after aging just starts, you need to replace this belt of this generator, and the tensioner can be.

What's the deal with the chirping of the car when it starts in the morning?There was a screaming sound when the car first started, and it was gone after a while, so what is the reason and how to deal with it.

Hello, happy to answer your questions.

What's the deal with the chirping of the car when it starts in the morning?There was a screaming sound when the car first started, and it was gone after a while, so what is the reason and how to deal with it.

This kind of sound is mainly the belt of the generator, after a long time, the wear of the base belt of the locust is relatively large, or there will be this sound after the aging has just started, and the belt of the generator needs to be replaced by a more hidden bridge, as well as a tensioner.

See. The car is only three years old.

What kind of car model are you?How many kilometers have you run now?

Renault, more than 20,000 kilometers.

This is the belt problem with this generator. The tensioner of this belt needs to be checked, and if there is no problem, the belt needs to be replaced.

Good. Oooh.

Over time, the engine belt will age and slip, and then make a squeaky sound. The belt is rubber, and the friction will decrease after aging, and the power can not be transmitted well, which will produce the phenomenon of slipping, and then after slipping for a while, the friction heat will soften and the sound disappears.

There is a screeching sound when the engine starts, and that's the problem!

For example, timing belt tensioners, timing belt tensioners and water pumps will be worn or aged.

In this case, 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.

How to identify the sound of a car:

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.

There is a screeching sound when the engine starts, and that's the problem!