Why does the engine of a car make a tinnitus like sound?

The reasons for the abnormal noise of the car are very complicated, one is the ignition is not right, the second is the loosening of the lock screw of the intake and exhaust valves, resulting in too large or too small clearance, the third is the piston ring breakage, the fourth is the wear of the timing gear belt, etc., which will cause the engine to make abnormal noise.

That's supposed to be clutch squeak! Let the 4s check the piece where the clutch and flywheel are connected.

1.The cam is worn excessively, and the tappet jumps during operation; 2.Excessive valve clearance due to wear or improper adjustment of the valve stem end and adjustment screw or rocker arm causes the swing arm head of the overhead valve to collide with the top of the valve; 3.

excessive carbon deposition in the valve guide; 4.The valve spring seat falls off; 5.Hydraulic tappets or tappets are damaged.

Is there a pressure leak

1. The engine blew off. is a metal DU that resembles a metal

The sound of knocking can also be said to be knocking on the dao cylinder, and the cause of the failure can be divided into three versions: a. Unqualified fuel.

right, using inferior fuel or under-labeled fuel. b. Engine timing control error, such as ignition advance angle is too large, etc., readjust the timing. c. If there is too much carbon deposition inside the engine, you can first try the carbon deposition cleaning effect by disassembling it or pulling it at high speed, otherwise you can only clean the carbon deposition by disassembling the engine.

Generally, the more serious ones are often accompanied by the more serious situation of burning engine oil. 2. Abnormal valve noise. After the car, the engine "clicks", which is the sound of the valve, especially after the cool car lands, because the oil pressure has not gone up at this time, and the valve has not been lubricated in place, so it will be fine after a while.

This can be the case if your car is parked for a long time.

Having a sound can be normal or abnormal, soIt needs to be checked to know if it is normal, so the engine is usually sent out. The most common Dada sound is the carbon canister solenoid valve, especially when the cold car starts, the carbon canister solenoid valve is Dada sound, especially the Mercedes-Benz engine. When the cold car starts, the canister solenoid valve is particularly loud, sometimes for about a minute, with some intermittent sounds.

There is also the sound of the solenoid valve of the fuel injector working, and the sound of the solenoid valve switch of the fuel injector is also a clattering sound, but it is not as loud as the carbon canister solenoid valve. The other is a high-pressure oil pump on a direct in-cylinder injection engine. The high-pressure oil pump is also the sound and loud voice of Dada.

The faster the throttle, the faster the sound frequency of the high-pressure oil pump. For example, the high-pressure oil pump of a Volkswagen or Toyota Corolla is very loud, especially when starting cold.

Generally speaking, most of the common Dada sounds mentioned above come from the above three components. Generally, new cars buy some Dada sound, generally normal sound, if the engine after a certain period of time, suddenly appear different Dada sound, then it may be a fault sound. So the engine has these causes of failure.

Engine top valves, engine valve clearance is not within the standard range, there are some accessories on the engine, such as engine belts and tensioners, oil pressure solenoid valves on the engine, camshaft adjustment valves are damaged, etc., and Dada may also be issued. The sound of the high-pressure oil pump is too loud, which is different from the normal working sound, so the high-pressure oil pump will also be damaged.

To judge whether Dada's voice is normal,First of all, look at where Dada's voice comes fromand then see if Dada's voice is different from the previous Dada. If it's really bad, find a car to compare with the same car, or go to a repair shop to find a professional to repair it. In short, Dada doesn't have to be a glitch sound.

However, the normal sound comparison or examination shall prevail. It's normal for a car engine to produce a "click-click-click" similar working sound, but if we can hear it clearly in the cab or outside the car, it needs to be checked.

If you hear the abnormal sound of "Zizi" in the process of driving, and this is the abnormal sound caused by the problem of the engine belt, because the abnormal sound of "Zizi" is mostly the aging of each 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 engine timing belt, generator belt, circulating water pump belt, air conditioning belt, power pump belt, etc. 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 of 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 oil on the joint surface of the belt and the pulley (it will not affect the belt slippage).

If it is the generator belt that rings and the headlights are more obvious, you have to take off the generator belt, turn the motor pulley to 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.

Point 1: If there is a sound, it is definitely not a normal phenomenon, and it should be checked in time, and the second point is likely to be the engine ** oil leakage, and you should take a look at point 3, it may be that there is a problem with the engine system or the screws are loose.

Under normal circumstances, it is normal for the engine to have sound, because the engine will produce sound when it is running, depending on the engine sound, if the noise will be particularly loud, it may be due to the excessive friction of the internal parts and the increase in noise.

If there is always a sound in the engine, then I think this is a normal phenomenon, and we can go to the repair shop to check it.

1. Engine oil.

If the oil viscosity of the vehicle is too high, it is easy to cause problems with the operation of the engine, and the lubrication effect will become poor, resulting in high engine noise. Therefore, at this time, you should go to the repair shop in time to check whether it is time to change the engine oil, or calculate whether the time for maintenance is up.

2. a transmission belt.

Check to see if the drive belt is loose, sometimes the belt is loose and can cause the engine compartment to become louder. At this time, the transmission belt needs to be replaced in time.

3. Water temperature. If the engine is noisy, it is also possible that the water temperature is too high, and it is necessary to see if the water temperature gauge is normal and whether there is smoke in the engine compartment. Be sure to change the coolant before winter.

4. Idling. If you feel that the noise is relatively loud when idling, and the idle speed of the vehicle is high, it is likely that the throttle, air intake, and fuel injector of your car should be cleaned, especially the throttle.

5. Sound insulation. If you listen to the engine working normally from outside, and feel that the noise is too loud when you sit in the car, it means that your vehicle is poorly insulated. The vehicle's seals should be inspected to see if there is any signs of aging. Or increase the sealing effect of the vehicle.

Many car owners complain that the noise of their cars is getting louder and louder, what is the reason?

The reasons for the sound of the automobile engine: 1. If there is a "click" knocking sound from the upper part of the engine and the sound of the world is regular, the frequency will increase with the increase of engine speed, and this abnormal sound is caused by the impact between the top of the piston and the cylinder head; 2. When the engine is running, if you hear a laughing "dangdang" or "click" knocking sound from the side of the cylinder block, it means that the engine has a cylinder knocking fault; 3. The working state of the engine is rough, and in extreme cases, it will cause the connecting rod to bend and deform, and the bending of the connecting rod will deflect the direction of the reciprocating motion of the cylinder, causing the piston to make a percussion sound when reversing; 4. Excessive valve clearance will cause a continuous "click" contact sound around the cylinder head when the engine is running at low temperature, and the frequency of this abnormal noise is positively related to the engine speed, but it will be alleviated with the increase of engine temperature.

1.It may be that the car has been used for too long, and the parts are aging.

2.The engine has carbon deposits and can be cleaned.

3.Gasoline may not have the designated designation.

1) Valve leakage.

The valve leakage sound is outside the valve door, which is more obvious at high load and low speed, and the sound is enhanced with the increase of load, mainly because when the valve seat is reamed, due to improper operation or excessive wear of the inner hole of the valve guide, the valve seat is skewed or the valve clearance is small, resulting in valve ablation causing the valve to close the valve tightly and leak sound.

Solution: Remove the cylinder head, grind the valve, check the valve spring spring, and readjust the valve clearance.

2) The valve is knocking.

When the engine is idling, there is a continuous knocking sound between the tail end of the valve stem and its driving parts, which increases with the increase of speed, and the sound does not change when the engine temperature changes or when the fire is off.

The main reasons: 1. The adjusted valve clearance has changed (poor locking, wear between the valve stem and the driving parts), and the valve has not been adjusted well.

2. The valve adjustment screw is worn, the lock nut is loose, and the valve clearance is too large or inconsistent.

3. The valve spring seat is worn and grooved, and the valve stem and duct are worn too much.

Solution: Readjust the valve clearance, if the lock nut on the adjustment screw is loose, it should be locked firmly, and replace the severely worn parts.

3) The valve spring is broken and should be replaced.

4) The valve seat rings and the seat ring falls off.

The surface of the valve seat insert is rough, the machining accuracy is unqualified, the interference amount of the seat insert is not properly selected and loose, the material selection is improperly deformed after being heated, or the inlay process of the valve seat is not up to the requirements.

Treatment: Re-inlay the valve seat according to the requirements of the assembly process, the upper end face is flush with the body plane, and the higher part should be flattened.

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There must be a malfunction inside the machine!

Hello: First of all, what is the type of engine, followed by the engine as a whole, or some parts of the sound, if you are not a professional maintenance personnel, it is recommended to go to the 4S shop or professional maintenance shop to check it.

Hello, this needs to be judged according to the specific sound.

The engine itself is audible when it works. If it is an abnormal noise, you need to go to a 4S shop or a professional repair shop to check.

It may be that the engine is very bad, it may be that the gasoline is not up to standard or the throttle is leaking, or the cam is very worn, or it is possible that the tires are worn.

It should be that the rubber is aging, there may be a lack of lubricating oil, and it may be the abnormal noise caused by the rough work of the engine.

It could be because the oil is too viscous, or it could be because the exhaust system is faulty.