The oil has just been changed, and the sound is louder than before

Hello, this situation may be that the specifications you replace are different, generally speaking, it is good to drive for a while.

Hello, first check whether the oil model replacement is quite different from before. After making sure, whether there is a problem with the quality of the oil. Is it in the maintenance process. There is an abnormal sound when the accessories are not installed in place.

The first has a certain relationship with the weather, the quality of the second engine oil is relatively average, and the third needs to be run in.

It should be said that the engine noise of the newly changed oil engine is louder than before, which is a normal phenomenon, after all, the engine also needs a certain amount of running-in.

Generally speaking, if you change the new engine oil, his voice will be a little different, and it usually takes a few days to run in.

Hello, first of all, confirm whether the oil is the same as the previous model, the new oil also needs to be run-in, and it is normal to start moving more.

If the oil is replaced with the previous model, then please don't worry too much, because the new oil will have to be run in for a while, and it will be fine after a while.

The engine oil has just been changed, and the sound is louder than before, and this is a newly replaced oil filter, and it still needs to be run-in for a while.

This should be engine oil, the thickness is a little different, take a look, this is the model with engine oil, right? Generally speaking, five w30 is fine.

Hello, in this case, there is generally no problem with the engine oil, it is best to clean the throttle.

If this is the case, it is likely that the following reasons may be caused.

Cause. 1. Too much oil is added. On the contrary, adding too much oil will increase the resistance to the rotation of the crankshaft, so that the oil will increase consumption, and will also lead to an increase in carbon deposition in the combustion chamber, so that the engine power will decrease, and then it is easy to detonation, and the noise will increase.

Therefore, adding engine oil is the same as drinking alcohol, don't be greedy! So what is the right amount of engine oil? Then refer to the scale value of our oil scale, between the highest scale and the lowest scale, neither too high nor too low!

Cause. Second, the oil model has been changed. When the previous engine oil has been used for a long time, the carbon deposits more and more, and when the vehicle is replaced with new engine oil, the engine cannot quickly adapt to the viscosity of the new engine oil, which will produce high speeds, resulting in louder engine noise.

Cause. 3. Mixed engine oil. In addition, the mixing of engine oil will also cause the engine to become louder, because the technical formula of different brands of engine oil is different, and the mixing of different engine oils will produce some adverse chemical reactions, which will cause wear and tear on the engine, and the noise will also increase.

The fourth reason is to encounter fake engine oil. Needless to say, the lubrication and cleanliness of fake engine oil are relatively weak, and it cannot protect the engine. Speaking of which, we still have to remind everyone to look for reliable channels when buying engine oil.

The reason why the engine is louder after changing the oil,It is mainly related to the characteristics of the oil itself and the improper control of the oil quantity, for the reasons mentioned below:

When you use the old engine oil before the car for a long time, it becomes more and more thinner, and it is easy to cause carbon deposits when the engine oil is diluted. When replacing a car with new oil, the new oil and the old oil are mixed together, and the engine does not adapt to the viscosity of the oil, which will increase the speed and cause a lot of engine noise. When this happens, high-grade gasoline can be used to drive at high speeds, and the situation may be improved.

If the oil is added excessively, there will be more drag when the engine is running, which will affect the engine power and greatly increase fuel consumption. As the amount of oil entering the combustion chamber increases, the air-fuel ratio of the combustion chamber changes and the engine noise increases accordingly. So, when adding oil to your car, make sure you add the right amount because too much oil can damage the engine.

Different grades of oil have different characteristics, so when starting an engine at low temperatures, different grades of oil will have different properties. Oil quality can be classified into many different grades from the highest to the lowest, with SA oil quality being the lowest if the API standard is followed. If the chosen oil has a higher viscosity and starts the engine at a lower temperature, additional losses are added when starting the battery, so the engine noise will be higher.

If a relatively inferior oil is added, it is also a "fake" oil. Lower-quality oils have little to no lubrication and anti-wear effect, which can lead to excessive engine pressure, which can increase engine wear and noise. Therefore, when adding engine oil, you must learn to identify the authenticity of the engine oil, and do not add some inferior engine oil, otherwise the gains outweigh the losses.

In summary,As a consumer, you need to choose the right engine oil to avoid a big impact on the car engine.

Under normal circumstances, if there is no problem with the replacement of the engine oil, it is not a fake engine oil, and the engine sound is not too large, a better fully synthetic engine oil will make the engine noise smaller, if there is really a mechanical wear problem, there will be a sound when replacing the good engine oil, the engine is loud, the main check is the external noise or the internal noise, you can first remove the generator belt, see if the sound has changed, if there is no change, the sound is still very loud, you have to check the inside of the engine. [Summary].

Hello, I'm helping you sort out the answers to your questions, please wait a moment

Under normal circumstances, if there is no problem with the replacement of the engine oil, it is not a fake engine oil, and the engine sound is not too large, a better fully synthetic engine oil will make the engine noise smaller, if there is really a mechanical wear problem, there will be a sound when replacing the good engine oil, the engine is loud, the main check is the external noise or the internal noise, you can first remove the generator belt, see if the sound has changed, if there is no change, the sound is still very loud, you have to check the inside of the engine.

The oil is too full. If the engine oil is too full or the hand shakes and adds excess oil and does not deal with it, then your car may face the situation of burning oil, especially when the number of revolutions is very high, it will increase the working load of the engine, and the engine compartment will become louder. Therefore, after adding oil, be sure to measure it with an oil ruler, once too much oil is added, it is best to go to a nearby repair shop to pull it out, so as not to affect the state of the engine.

The wear is relatively large, indicating that the oil you change is not good, it is recommended that you still change the engine oil of a better point, the best car oil of the full synthetic SN level, it is recommended that you change the dark horse king car oil of the full synthetic SN level, which is better for your later car maintenance and engine maintenance, I hope it will help you!

After changing the oil, the sound should be slightly reduced, check whether the noise comes from the loosening of the guard around the engine, causing resonance, and then whether the noise is reduced after the car is warm.

Different grades of engine oil have different characteristics, and their low-temperature start-up and high-temperature wear resistance and adhesion also have different performance. The viscosity of the engine oil is inversely proportional to the temperature, when the engine is cold, the viscosity of the engine oil is higher, if the oil is thicker, it will add additional loss to the starting motor, battery, etc.; However, if the oil is too thin, it is difficult to form enough protective film under high temperature operation, resulting in insufficient lubrication, resulting in increased wear of the parts.

If you obviously feel that the engine noise becomes louder after changing the oil, there are the following reasons: 1. The oil does not meet the standard or the amount added is too much. 2. At the end of the run-in period of the new car, the engine sound will be improved and the fuel consumption will decrease. 3. The viscosity of the new engine oil is high, the mechanical resistance is large, the pressure in the cylinder will also increase, and there will be a grunt 4. Moderate carbon deposition, because the old engine oil is thinner and thinner, so more and more carbon deposition will affect the power, but after the oil is thin, it compensates for the power loss after the carbon deposition, and the viscosity of the new engine oil is large, which reflects the problem.

When the oil in the engine block is too full, it will produce greater unnecessary resistance to the rotation of the crankshaft, which in turn will affect the power output, and then increase fuel consumption. The amount of oil entering the combustion chamber is greatly increased, which increases the carbon deposit in the combustion chamber, increases the piston movement resistance, and reduces the engine power. If there is too much oil, it will enter the combustion chamber from the gap between the cylinder and the piston, and burn to form carbon deposits.

These deposits can increase the compression ratio of the engine and increase the tendency to detonation; The red-hot state of carbon deposits in the cylinder is also easy to cause premature ignition, such as falling into the cylinder will aggravate the wear of the cylinder and piston, and will also accelerate the pollution of the oil. Secondly, too much oil increases the stirring resistance of the crankshaft linkage, and the noise will also increase.

<> "What's going on with the loud engine that just changed the oil."

Many car owners usually encounter a problem after changing the new engine oil, that is, after changing the new engine oil, the car's engine soundbook is a little larger than before. So what's the deal with the loud engine that has just been changed?

It may be that the oil model is not right, the viscosity of some oil is relatively low, which does not meet the requirements of the use of the vehicle to start the digging machine, and the temperature rises during the engine working process after joining, and its viscosity will become lower, resulting in the noise of the engine after the oil change.

If the amount of oil is too much in California when changing the oil, it will increase the running resistance of the engine, which is also one of the common reasons for excessive engine noise after the oil change of the car.

The added engine oil is different from the previous engine oil, so it will also make the noise of the car suddenly become louder after changing the engine oil, so it is necessary to check it as soon as possible and deal with it in time after clarifying the cause.

The engine sound of just changing the oil is likely to be due to too much oil, the viscosity of the oil is not suitable for the oil model, the mixing of different brands of oil, and the encounter with fake oil

1. If the oil is added too much, the more the car oil is not added, the better, on the contrary, the oil is added too much, which will increase the resistance to the rotation of the crankshaft, so that the oil will increase consumption, and will also lead to an increase in carbon deposition in the combustion chamber, so that the engine power will decrease, and then it is easy to detonation, and the noise will increase. Therefore, adding engine oil and drinking wine is the same reason, don't be greedy, so how to be the correct amount of engine oil, then we must refer to the scale value of our oil scale, between the highest scale and the lowest scale, neither too high nor too low;

2. The oil model is changed, and the viscosity of the oil is not suitable: when the previous oil has been used for a long time, the carbon deposit is increasing, and when the vehicle is replaced with new oil, the engine can not quickly adapt to the viscosity of the new oil, which will produce high speed, which will lead to louder engine noise;

3. Different brands of engine oil are mixed, after all, lubricating oil is a chemical product, and the base oil and additive formulations used by different brands are different, if mixed, it will inevitably change the characteristics of the lubricating oil itself, so as to not play a good role in protecting the engine, causing wear of engine parts and making the engine noise. Therefore, if you change the brand of lubricating oil, it is best to put it as clean as possible when draining the oil.

The viscosity of the new oil is higher, the mechanical resistance is greater, and the pressure in the cylinder will also increase.

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. Equipped with a turbocharged hairstyle, there is bound to be a difference between the sound and the sound of a naturally aspirated engine; 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.