The engine is loud, what is the reason?

Almost every car that has been driven for a long time will increase the engine noise and vibration. This phenomenon is easy to explain, the engine will age, and with the aging will definitely bring problems of one kind or another.

1. Most of the vibrations are pots with machine foot glue.

Although it is true that the engine body will wear out a little with the increase of years of use, and the accuracy of various fits inside the engine will be reduced, this is far from the level that will cause significant vibration. The engine vibration is intensified, and in most cases it is a problem with the foot glue.

The so-called foot glue is called engine shock absorber seat. In fact, it is a few rubber blocks that are padded between the engine and the metal frame. Because the engine is running at high temperature for a long time, and rubber itself is very sensitive to high temperature, so the aging of the foot rubber is inevitable.

The solution is very simple, just replace the foot glue. But this operation requires lifting the engine.

2. There is basically no solution to the abnormal noise in the interior.

In addition to the sound of the engine, the most common thing in old cars is all kinds of strange interior noises. Some of the abnormal noises can't be distinguished at all. In most of these cases, it is a problem of abnormal noise in the interior.

Why does the interior make abnormal noise? The interior of a car is made up of many parts, including seats, panels, equipment, and miscellaneous things. These things are basically all screwed or glued in place.

The glue hardens over time, and after hardening, friction between the parts makes a sound. The place where the screws are fixed will be loose for a long time, and there will be abnormal noises if they are loose.

3. Increased wind noise? Check the door seals!

The increased wind noise is most likely to be the fault of the door seals. Quite simply, one of the main functions of door seals is to seal the vehicle and prevent excessive wind noise from entering the cabin. The door seal is also made of rubber, which will harden after a long time, and of course it will not be able to stop the air leakage after hardening.

This is relatively easy to solve, distinguish which side of the door is the most noisy, and replace all the door sealants on that side. It also directly replaced all the sealant strips on all doors of the whole car.

However, there is a certain chance that the wind noise is still so loud after the change, then it is very likely that the sound insulation glue has hardened in places such as wheel arches, engine compartment firewalls or trunks.

Check if the oil level is sufficient? Replace the oil filter if necessary.

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

The engine is loud, and it is common to have a broken silencer. There is also a crashing sound caused by the failure of the cylinder barrel piston.

If you want to listen to the sound of the engine, you must find a quiet place, because the sound insulation effect of a better car is very ideal, if you don't look at the engine's tachometer, you don't know that the car is in a lit state, and it is possible to turn the key to make a fire. When listening to the engine, follow the following steps (personal opinion, for reference only):

1. During the start of the engine, there should be no screaming sound in the starting motor; The engine idle speed "sudden sound" is uniform, and there is no abnormal noise; The idle speed is stable at about 850 rpm (please refer to the car manual for the specific stable idle value).

2. Gently step on the accelerator, let the engine speed slowly increase, there should be no noise in the process, individual models will have resonance phenomenon at a fixed speed, that is, the whole body shakes (if the resonance is very slight, does not cause discomfort in the ride, it should be normal), and the resonance phenomenon should be eliminated after the speed; When the engine speed exceeds the maximum power point speed, the sound is generally more noticeable, but there should be no metal friction sound.

3. Press the accelerator pedal quickly, and the sound of engine power improvement should be smooth and non-stuck; Carefully distinguish the sound of each engine speed. The main noise is: valve sound (generally "clicking" sound), if it is large, there is a suspicion of top valve; All kinds of belt rotation sounds (generally "squeak" sounds), if large, may be the belt and the body friction; If the engine emits other friction sounds, it is doubtful that the sudden sound is masked.

4. Find a suitable place, drive the vehicle according to the compound road conditions for 5-10 minutes, and the idle speed should still be stable at the original idle speed without change after stopping, and the sound should be the same as before.

5 Open the engine cover, listen to the sound on both sides of the engine, and at the same time move the accelerator control raft with your hands, and listen carefully to the engine sound according to the key points mentioned above.

Listen to the engine and identify the problem.

The car has been in the car for a long time, if the car has a strange sound, you can feel it, we can judge what happened to the car from these sounds, I am ready to spend a few days to complete the "simple identification of car small fault series", I hope to help you drive a little help.

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

The reasons for the loud sound of the hair shed block are: the foot pad is damaged and aged after a long time and late use, and loses the effect of shock absorption; The engine oil is not enough or the oil is old and viscous, which cannot be used for lubrication; The sealant is old and has lost its role as sound insulation.

The reasons why the engine is very loud are as follows: 1. Aging of components: It may be that the car has been used for too long and the parts are aging.

2. There is carbon deposit: there is carbon deposit in the spring pickpocketing motive, and the carbon deposit can be cleaned up in time. 3. Oil quality

Unqualified. 4. Temperature sensor: faulty.

This is quietly related to the introduction as follows: 1. Introduction of the engine: The engine is a kind of machine that can convert other forms of energy into mechanical energy, which is not only suitable for the power generation device, but also refers to the entire machine including the power unit.

2. Types of engines: including internal combustion engines, external combustion engines, jet engines, and electric motors

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 lifting 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 you want to judge that the belt is a good way is to drip oil on the belt, if it is the motor belt in the code 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.