Manual Transmission: Apply Handbrake First or Shift to Neutral First?

Is It Safe to Buy a Used Car Without Transferring Ownership and Only Signing an Agreement?

This sales agreement has legal effect and is protected by law. However, buying a used car without transferring ownership and only signing an agreement carries legal risks. Here is more relevant information: 1. Relevant legal provisions: Article 50 of the Tort Liability Law stipulates that if a motor vehicle has been transferred and delivered through a sale but ownership registration has not been transferred, and a traffic accident occurs where the motor vehicle is at fault, the insurance company shall compensate within the compulsory insurance liability limit. Any insufficient amount shall be borne by the transferee. The liability is determined based on the accident liability certificate issued by the traffic police department, and the new owner is responsible but must provide evidence. Therefore, the agreement is valid, but not transferring ownership may lead to disputes over ownership in the future. It is recommended to complete the transfer as soon as possible. 2. Required materials for motor vehicle ownership transfer: vehicle license, motor vehicle registration certificate, motor vehicle registration supplementary form (obtained from the local vehicle management office with ID, vehicle license, and road maintenance fee certificate), vehicle purchase tax certificate, ID cards and household registration books of both buyer and seller. For non-local residents, a residence permit is required, and the buyer's residence permit must be valid for at least one year.

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Why Does the Car Shake When Starting Cold?

Cold start shaking is caused by insufficient engine temperature, inaccurate air-fuel mixture ratio, carbon buildup in the car, and other reasons. It is recommended that the owner promptly take the vehicle to a repair shop for inspection. Below are more detailed explanations: Detailed reasons: 1. During a cold start, the car should inject more fuel to meet power requirements. The larger the spark plug gap, the smaller the ignition energy. At low temperatures, fuel atomization is poor, requiring higher ignition energy. Over time, the spark plug's ignition gap tends to increase, leading to reduced ignition energy, which affects performance and causes the car to shake. 2. Inaccurate air-fuel mixture ratio occurs in both open-loop and closed-loop control. If the car's computer makes an error in judgment, it may cause inaccuracies in controlling the air-fuel mixture and ignition timing through the actuators, thereby reducing the car's power output and causing shaking. 3. When the car starts cold in the morning, engine shaking may be due to heavy carbon buildup on the valves, though faults in the air flow meter and coolant temperature sensor cannot be ruled out. If there is significant carbon buildup on the valves, the hardened carbon during cold starts can affect valve closure, reducing the engine's compression ratio and disrupting normal operation. During warm operation, the high temperature softens the carbon, preventing it from affecting valve closure, so the engine operates normally when warm.

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Is it a problem if there's a small bulge on the side of the tire?

When a tire bulges, it indicates that the internal cord layers are damaged. Since cord layer damage is irreparable, a bulging tire should not continue to be used and must be replaced promptly to prevent the risk of a blowout. Here is more relevant information: 1. Causes of tire bulges: A tire bulge occurs when the internal cord layers are damaged, causing uncontrolled air pressure inside the tire, which leads to uneven force distribution on the outer tire. Areas under higher pressure will protrude, forming a bulge. This is a common type of tire wear. If not addressed promptly, the bulge can suddenly rupture due to rolling acceleration or excessive friction heat, leading to an explosion. Statistics show that the vast majority of blowouts are caused by bulges. 2. Irreparability: Whether it's a bulge or a sidewall rupture, neither can be repaired by patching. The cord layers in these areas are already broken, and patching only involves applying a rubber piece inside, which cannot fully restore the cord layers. As a result, after some time of driving, the tire may bulge again in the same spot or even blow out, posing significant safety hazards. Additionally, the sidewall of a tire is constantly deforming and recovering while driving, making patches prone to falling off. The best solution is to replace the tire promptly.

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What is the fuel tank capacity of the 2021 Volvo XC60 in liters?

The fuel tank capacity of the 2021 Volvo XC60 is 70L. Owners who purchased the 2017 Lavida can also check this information in the vehicle's configuration sheet. The 2021 Volvo XC60 comes in two models with different horsepower, both using 95-octane fuel. The 190-horsepower model has an NEDC combined fuel consumption of 7.5L/100km, allowing a range of 933km on a full tank. The 250-horsepower model has an NEDC combined fuel consumption of 7.9L/100km, with a range of 886km on a full tank. During daily driving, it's essential to monitor the remaining fuel level. This is typically observed via the fuel gauge inside the vehicle. Under normal circumstances, the fuel level is accurately reflected on the gauge. The fuel gauge usually has 5 to 6 segments, and it's advisable to refuel when only 2 segments remain to avoid running out of fuel mid-journey. During actual refueling, the fuel quantity might exceed the calibrated capacity. This is because the manufacturer's specified tank capacity is measured from the bottom of the tank to the safety limit, with additional space from the safety limit to the tank opening. This space accommodates fuel expansion due to temperature increases, preventing overflow. Filling the tank to the opening can result in a fuel quantity larger than the calibrated capacity. Other factors affecting vehicle fuel consumption include: Vehicle weight: Weight and fuel consumption are directly proportional. A 10% reduction in weight leads to a corresponding percentage decrease in fuel consumption. Vehicle aerodynamics: A lower drag coefficient significantly reduces fuel consumption, while a higher coefficient increases it proportionally. Low tire pressure: Increases friction and adhesion, leading to higher fuel consumption. Driving habits: Aggressive starts and frequent braking/accelerating significantly increase fuel consumption. Wind direction: Tailwinds reduce consumption, while headwinds increase engine workload and fuel consumption. Road conditions: Flat roads result in lower consumption, while rough or steep roads increase it. Additional electronic devices: Using accessories like air conditioning increases fuel consumption.

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Which Part is the Rim?

The rim, commonly known as the wheel rim or hub, is part of the wheel hub—specifically, the outer ring that directly contacts the tire. The main body of the wheel hub consists of the fixed part connecting to the axle and the spokes, which together form the wheel, collectively referred to as the hub. Below is more related information: 1. Hub Bearing: In the past, car hub bearings were mostly used in pairs as single-row tapered roller or ball bearings. With technological advancements, cars now widely use hub units. The application and usage of hub bearing units have grown significantly, evolving to the third generation. The first generation consisted of double-row angular contact bearings. The second generation featured a flange on the outer race for fixing the bearing, allowing it to be easily mounted onto the axle and secured with a nut, simplifying car maintenance. The third-generation hub bearing unit integrates the bearing unit with the anti-lock braking system (ABS). The hub unit is designed with inner and outer flanges, where the inner flange is bolted to the drive shaft, and the outer flange assembles the entire bearing. 2. Spun-Cast Wheels: Spun-cast wheels are favored by many car owners for their cost-effectiveness and the ability to avoid the design limitations imposed by the physical constraints of forging technology, unlike forged wheels. However, due to their weaker strength, they are more prone to deformation compared to forged wheels. On the other hand, spun-cast wheels exhibit high toughness, allowing them to withstand minor deformations and making them less likely to crack than forged wheels. Under similar damage conditions, they suffer less harm and can be repaired by professional manufacturers or technicians. Forged wheels, once damaged, incur higher repair costs and difficulty.

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Why does the Audi A4L make abnormal noises when passing over speed bumps?

The reasons for abnormal noises when the Audi A4L passes over speed bumps are as follows: Body noise: This issue is usually caused by insufficient body rigidity, leading to deformation of the vehicle while driving, resulting in friction or shaking between the doors and the frame, or friction between steel plates due to welding failures in certain areas. Applying adhesive strips on the doors and windows or placing rubber pads in the friction areas may reduce or eliminate the noise, but these are temporary fixes. Some vehicles have significant wind noise due to their design. If no additional items have been added, owners should not attempt to resolve it themselves. Additionally, loose body components can also cause abnormal noises, which can usually be fixed by tightening screws. Engine compartment noise: Some noise from engine vibration is normal, but certain unusual sounds may indicate potential faults. For example, a sharp belt squealing sound is usually caused by belt slippage; a sharp metallic sound during engine operation is often due to damaged bearings in the generator, water pump, or power steering pump; if there is a hissing sound from the engine, it may be due to a blocked exhaust system, vacuum tube leakage, or breakage. If there are abnormal noises inside the engine, these are usually major faults, and the vehicle should be sent for inspection and repair as soon as possible. Tire noise: Tire noise is rhythmic, and the frequency increases with speed. A dull "thumping" sound is often caused by deformed, bulging, severely worn, or underinflated tires; a "clicking" sound may indicate small stones stuck in the tire tread. If the tire makes a roaring sound and the body noticeably shakes or the vehicle pulls to one side, it is likely a tire blowout, and the tire should be changed immediately.

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Manual Transmission: Apply Handbrake First or Shift to Neutral First?

Is It Safe to Buy a Used Car Without Transferring Ownership and Only Signing an Agreement?

Why Does the Car Shake When Starting Cold?

Is it a problem if there's a small bulge on the side of the tire?

What is the fuel tank capacity of the 2021 Volvo XC60 in liters?

Which Part is the Rim?

Why does the Audi A4L make abnormal noises when passing over speed bumps?

What Does the Engine Oil Symbol Represent?

What documents are required for a six-year vehicle inspection?

Can a driver's license only deduct points for three vehicles?

Where is the oil filter located on the Geely Binrui?