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What Causes Excessive Noise in a Car?

3 Answers

MacMichael

07/29/25 11:03am

Here are the reasons for excessive noise in a car: 1. The engine oil viscosity is too high; 2. Carbon deposits in the cylinders; 3. Aging of engine mounts; 4. Aging tires. Additional information: Solutions to reduce car noise include: 1. The most noticeable change in noise is engine noise, especially in vehicles that have not been maintained for a long time, where the noise is particularly evident. Regular vehicle maintenance is recommended. 2. For the engine, if overly viscous engine oil is used, it can result in insufficient oil flow into the hydraulic lifters, causing valve noise and generating noise. In this case, it is necessary to switch to a relatively lower viscosity gasoline.

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Leila

08/13/25 5:09pm

I find that excessive car noise is quite common. The issue might stem from loose or worn engine components, such as a loose belt causing a hissing sound, or an exhaust system leak producing a gurgling noise. Worn spark plugs can also lead to increased engine noise during vibration. Regarding tires, insufficient tire pressure can cause a humming sound, while damaged wheel hub bearings may produce abnormal noises when turning. Thin brake pads can result in annoying squeaking while driving. It's advisable to start with simple checks, identifying whether the noise comes from the front or underneath the car, and promptly visit a repair shop to address the issue before it escalates into a safety concern. Ignoring unusual car noises can lead to costly major repairs, so it's best to resolve them promptly for peace of mind while driving.

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StJohnny

10/07/25 8:37am

As an experienced driver, I've faced noise issues multiple times. Loud vehicle noises are usually related to actual usage: engine aging increases operational noise, especially noticeable during acceleration; uneven tire wear can cause a humming sound at high speeds, or loose suspension systems may rattle on bumpy roads; a faulty air conditioning compressor might also produce continuous squeaking. Such noises can be distracting during daily driving, so I make it a habit to perform regular maintenance to avoid oversight, such as checking key components during oil changes. Once abnormal noises are detected, early repairs are far better than procrastination, ensuring smooth and safe driving is paramount. Spending a little money on repairs makes driving much more comfortable.

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What Causes the Engine Fault Light to Illuminate During Self-Check in the Nissan X-Trail?

The engine fault light in the Nissan X-Trail may illuminate due to the following 7 main reasons: Sensor Malfunction: This includes sensors such as coolant temperature, crankshaft position, air flow, intake temperature, and oxygen sensors. When these sensors are damaged, have poor contact, or signal interruption occurs, the vehicle's ECU cannot accurately obtain engine data, triggering the engine fault light. Fuel or Oil Quality Issues: If fuel or engine oil is not added as per the manufacturer's requirements, it may cause engine wear, leading to the fault light illuminating. Poor Combustion of Air-Fuel Mixture: Poor combustion can result in engine carbon buildup or knocking. When detected by the oxygen sensor and reported to the ECU, the fault light will illuminate as a warning. Issues like spark plug failure, ignition coil failure, fuel pump failure, or clogged fuel lines can cause poor combustion. Turbocharging Problems: The intake boost pipeline or turbocharger can also trigger the engine fault light. The most common issue is turbocharger damage, accompanied by symptoms like oil leaks, high oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust. Intake Problems: If the vehicle's intake system is compromised, it may lead to clogged engine pipelines, and in severe cases, the engine fault light will illuminate. A dirty air filter that isn't cleaned regularly can cause intake issues. Exhaust Problems: Exhaust faults can also cause the engine fault light to illuminate. Common causes include rear oxygen sensor failure, catalytic converter issues, exhaust camshaft and bearing failure, with the catalytic converter being the most frequent problem. Using leaded gasoline, lead or silicon-based lubricant additives, physical damage to the catalytic converter, or fuel system malfunctions can easily lead to catalytic converter failure. Anti-Theft System Malfunction: If the vehicle's electronic anti-theft system fails or if the anti-theft controller does not match the engine's electronic controller, the anti-theft system can prevent the engine from operating normally, causing the engine fault light to illuminate. If the engine fault light illuminates, follow these steps: First, check if the engine is running normally, looking for signs like shaking or black smoke. If such issues are present, avoid restarting the engine. Note: Do not restart the engine if the light is red. If the engine can be started, turn it off and wait for 5-10 minutes. Without pressing the brake, press the start button once or turn the key halfway to the 'on' position without depressing the clutch. The vehicle will perform a self-check upon powering up. Wait for 5-10 seconds to see if the fault light turns off. If the fault light remains on, visit a service station as soon as possible. The service station can use a portable diagnostic tool to read the fault code, identify the issue, and perform targeted repairs.

How Long Does It Generally Take for a Car to Be Scrapped?

The scrapping periods for non-commercial vehicles and commercial vehicles are different, as detailed below: Scrapping regulations for non-commercial vehicles: For household 5-seat cars and 7-seat SUVs, as well as small and micro non-commercial vehicles, there is no usage period limit. When the normal mileage reaches 600,000 kilometers, the state will guide the scrapping process. In addition to the above vehicles, small and micro non-commercial passenger vehicles, large non-commercial cars, and wheeled special machinery vehicles also have no usage period limit. Common scrapping regulations for commercial vehicles: Small and micro taxi passenger vehicles have a scrapping period of 8 years, medium-sized taxi passenger vehicles have a scrapping period of 10 years, and large taxi passenger vehicles have a scrapping period of 12 years. Public transport passenger vehicles have a scrapping period of 13 years, other small and micro commercial passenger vehicles have a scrapping period of 10 years, and large and medium-sized commercial passenger vehicles have a scrapping period of 15 years. Micro commercial trucks have a scrapping period of 8 years, light and large commercial trucks have a scrapping period of 10 years. The vehicle scrapping process is as follows: The car owner applying for scrapping and renewal must fill out the "Application Form for Vehicle Modification, Transfer, Alteration, Suspension, or Scrapping" and affix the owner's seal. The registration office will accept the application and issue a "Vehicle Scrapping Notice" for vehicles that have reached the scrapping period. For vehicles that have not reached the scrapping period, after inspection by the vehicle inspection office and confirmation that they meet the scrapping standards, a "Vehicle Scrapping Notice" will be issued. The owner can choose a qualified recycling company to dismantle the vehicle with the "Notice". The recycling company will dismantle the vehicle and take photos after verifying the "Notice". The engine must be separated from the vehicle, the engine block must be broken, and the frame (chassis) must be cut. The owner must submit the "Modification Form", "XX Province Vehicle Renewal Technical Appraisal Form", "Scrapped Vehicle Recycling Certificate", and photos of the dismantled vehicle to the vehicle inspection office for verification and signature. The license plates will be reclaimed, and the scrapping registration will be processed according to regulations. Special notes: According to Article 30 of the "Regulations on Vehicle Registration", if the vehicle is damaged and cannot be driven back to the registration location, the owner can submit the vehicle for scrapping to a local vehicle recycling company. Commercial vehicles converted to non-commercial use must still be scrapped according to the original commercial vehicle scrapping period. According to Article 43 of the "Regulations on Vehicle Registration", after completing the vehicle transfer or deregistration, the original owner can apply to use the original license plate number when registering a new vehicle. The following conditions must be met: (1) The application must be submitted within six months after the transfer or deregistration; (2) The owner must have owned the original vehicle for more than three years.

What level of SUV does the Dongfeng Fengdu MX6 belong to?

Dongfeng Fengdu MX6 is a compact SUV with the following dimensions: length 4625mm, width 1790mm, height 1735mm, wheelbase 2630mm, front track 1540mm, rear track 1545mm, fuel tank capacity 65L, luggage capacity 603L, and curb weight 1445kg. The Dongfeng Fengdu MX6 is equipped with a 2.0L naturally aspirated engine, delivering a maximum horsepower of 144PS, maximum power of 106kW, maximum torque of 198Nm, and is paired with a 6-speed manual transmission.

What does high-frequency violation section mean?

High-frequency violation sections refer to road segments where traffic violations occur frequently. Below is an introduction to common high-frequency violations and their corresponding penalty points: 1. Crossing solid lines: This is a common issue for novice drivers, primarily due to inadequate driving skills and limited experience. Paying attention while driving and gaining more experience can effectively prevent this problem. 2. Forgetting to fasten seat belts: Seat belts are the simplest yet most effective protective devices in vehicles for occupants. However, both new and experienced drivers with low safety awareness often forget to buckle up. 3. Illegal parking: This is a major concern for most car owners in urban areas when going out, as finding parking spaces can be challenging.

How to Identify China IV and China V Vehicles?

The methods to identify China IV and China V vehicles are: 1. For vehicles that have already received the environmental protection inspection qualification mark, the emission standard can be viewed on the original or duplicate of the environmental protection inspection qualification mark; 2. You can log in to the Motor Vehicle Environmental Protection Website and enter the vehicle model and engine model in the New Vehicle Compliance Query System to check the emission standard. China IV and China V refer to different stages of emission standards stipulated by the national regulations. The higher the number of the emission standard, the higher the level, and the higher the level, the lower the engine emissions will be. Emission standards refer to the regulations on the content of harmful gases such as carbon monoxide, hydrocarbons, nitrogen oxides, particulate matter, and carbon smoke emitted from vehicle exhaust.

What is the voltage of the ABS sensor connector?

ABS sensor connector input voltage is 5 to 8V, output voltage is 650 to 850mV. The measurement method is to observe the voltage value displayed on the multimeter at the moment the ignition switch is turned on. As long as the voltage value changes, it indicates that the circuit connection is normal. Symptoms of a faulty ABS sensor include: 1. Inability to prevent wheel lock-up during emergency braking, posing a safety hazard; 2. The ABS warning light will illuminate, and the brake pads may not reset. The ABS system has a self-diagnostic function that monitors the system's operation. Once a fault that affects the normal operation of the system is detected, the ABS will automatically shut down, the ABS warning light will turn on, and a warning signal will be sent to the driver.

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