How to Clean Oil-Contaminated Road Surfaces?

What is the speed limit on internal market roads?

Motor vehicles driving on roads must not exceed the speed indicated by speed limit signs or markings; on urban roads with two or more motor vehicle lanes in the same direction and without speed limit signs or markings, the maximum speed is 70 kilometers per hour, while on closed motor vehicle-only roads and highways, the maximum speed is 80 kilometers per hour. Maximum speed of 30 kilometers per hour: Low-speed trucks, three-wheeled vehicles, tractors, battery-powered vehicles, wheeled special machinery vehicles, regular three-wheeled motorcycles, and mopeds must not exceed 30 kilometers per hour when driving on roads. The following behaviors are prohibited: Driving with doors or compartments not properly closed; hanging or placing items within the front or rear windows of the motor vehicle's cab that obstruct the driver's view; making or receiving handheld phone calls, watching TV, or engaging in other behaviors that hinder safe driving; stalling or coasting in neutral when going downhill; throwing items onto the road; driving a motorcycle with hands off the handlebars or hanging items on the handlebars.

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Can You Drive the Car Home on the Day of Purchase?

You cannot drive the car home on the day of purchase. The vehicle must first be registered with the traffic management department of the public security authority before it can be legally driven on the road. Below are the specific details regarding car purchases: 1. New car documentation: Purchase invoice, certificate of conformity, three-guarantee manual, user manual, two sets of keys, etc. Important note: All documentation must be complete, especially the certificate of conformity. 2. Purchasing insurance: Compulsory traffic insurance (CTI) is mandatory. Although commercial insurance is not compulsory, it is recommended to purchase third-party liability insurance and vehicle damage insurance simultaneously. The coverage for third-party liability insurance should be at least 500,000 yuan. 3. Paying vehicle purchase tax: Each region has designated locations for paying vehicle purchase tax. Bring the certificate of conformity, invoice, and the owner's ID card to complete the tax payment. 4. License plate registration: To register the license plate, the vehicle must be driven to an inspection site for checks on the exterior, chassis number, and engine number. After purchasing insurance, a temporary license plate must be obtained; otherwise, the vehicle cannot be moved without it.

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Is It Normal for a Car Steering Knuckle to Rust?

If there is slight rust under the steering shaft, it is a normal phenomenon. The steering column is generally not covered with paint for anti-oxidation protection, so after using the steering column for a period of time, a layer of rust will appear on it, which can be dealt with accordingly. Extended content: 1. Principle: The steering shaft is a transmission component connecting the steering wheel and the steering gear. The steering column tube is fixed to the car body, and the steering shaft passes through the steering column tube, supported by bearings and bushings inside the column tube. During a collision, the steering column tube and steering shaft at the front of the car move backward toward the driver's chest, while the driver, affected by inertia, moves toward the steering wheel. Part of the energy is absorbed by the restraint system, and the other part is transmitted to the steering wheel and steering column tube. A good car steering system should ensure that the driver is minimally injured in the event of a collision. 2. Function: The application of energy-absorbing steering columns in car steering systems plays a significant role in energy absorption. The role of the energy-absorbing steering column during a collision demonstrates that this structure reduces the rearward movement of the steering wheel during a frontal collision, decreases the degree of secondary injuries to occupants, and improves the passive safety performance of the car.

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Can an Automatic Transmission be Converted to a Manual Transmission?

Automatic transmissions and manual transmissions are different, so they cannot be converted to manual transmissions. The differences between automatic transmission cars and manual transmission cars are as follows: Different transmissions: Automatic transmission cars use automatic transmissions, while manual transmission cars use manual transmissions. Different driving methods: Automatic transmission cars can automatically switch to the required gear, while manual transmission cars require manual gear shifting. Automatic transmission means that the driver does not need to shift gears manually; the vehicle will automatically select the appropriate gear based on the driving speed and traffic conditions. Generally, automatic transmission cars have six gear positions, from top to bottom: P, R, N, D, S, L. Manual transmission refers to manually shifting the gear lever to change the gear meshing device inside the transmission, thereby changing the gear ratio to achieve the purpose of shifting gears. Automatic transmissions cannot be converted to manual transmissions, as it is not within the scope permitted by law. Driving an automatic transmission car using only the parking gear (P), reverse gear (R), neutral gear (N), and drive gear (D) can fully meet the needs of general driving. If encountering some special driving environments, other functional gears may need to be used. If the correct control method is chosen, automatic transmission cars can perform better than manual transmission cars.

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What is the difference between engine cleaning and fuel system cleaning?

Engine cleaning and fuel system cleaning mainly differ in that engine cleaning involves cleaning the entire internal system of the engine, including the throttle, spark plugs, and catalytic converter, while fuel system cleaning focuses on cleaning the fuel pipelines. Pre-cleaning protection: After the engine has cooled down, cover the battery with plastic sheeting to prevent cleaning agents or water from damaging the electrodes. Similarly, the fuse box, ignition coil, and generator should also be covered to prevent water splashes. Removing the decorative cover: The engine decorative cover is made of plastic, covers a large area, and is secured with clips, making it removable. The dust on the surface is most noticeable, and there is significant oil buildup beneath the cover. Only by removing it can the components underneath be cleaned. Spraying cleaning agent: Apply the cleaning agent to the engine parts that need cleaning. For areas with heavy oil buildup, spray the cleaning agent and use a brush to scrub, which helps to quickly break up the oil. Drying after 5 minutes: After the cleaning agent has been applied for 5 minutes, wipe it off with a towel. For parts where the oil hasn’t broken up, repeat the cleaning process several times until they are clean. Alternatively, a high-pressure water gun can be used for rinsing, but ensure waterproof measures are taken for the aforementioned components. Then, dry with chamois or a highly absorbent cloth, or use a blow dryer.

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What does the small wrench symbol on the car dashboard mean?

The appearance of a small wrench symbol on the car dashboard indicates that the vehicle requires maintenance. Here are the maintenance methods for household cars: 1. Regularly check tire pressure and promptly inspect for foreign objects in tire treads: Excessive tire pressure affects comfort and increases the risk of blowouts. Insufficient tire pressure raises fuel consumption and accelerates tire wear. Normal tire pressure should follow the vehicle's specifications, which can be measured using a tire pressure gauge. In cold winters, ensure tires are slightly more inflated than in summer due to thermal expansion and contraction. Promptly remove small stones, nails, or other debris from tire treads to prevent damage when flung out. Also, carefully inspect tire sidewalls for scratches—if significant marks are found, consult a professional at a tire shop. 2. Timely replacement or addition of antifreeze: Especially in winter when outdoor temperatures are extremely low, sufficient antifreeze is essential for normal vehicle operation. Otherwise, the radiator may freeze, disrupting circulation and causing malfunctions. Antifreeze levels should remain between MAX and MIX marks; replenish if low. Purchase antifreeze from reputable auto parts stores to avoid substandard products that may harm the vehicle and fail to provide proper antifreeze protection. 3. Regular oil checks: Engine oil is a crucial lubricant for smooth component operation. Beyond routine maintenance, conduct periodic oil inspections yourself. Ensure the oil level on the dipstick stays within normal range—neither too high nor too low. This is particularly important for older vehicles, which require more frequent checks.

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How to Clean Oil-Contaminated Road Surfaces?

What is the speed limit on internal market roads?

Can You Drive the Car Home on the Day of Purchase?

Is It Normal for a Car Steering Knuckle to Rust?

Can an Automatic Transmission be Converted to a Manual Transmission?

What is the difference between engine cleaning and fuel system cleaning?

What does the small wrench symbol on the car dashboard mean?

Do Manual Transmission Cars Have Transmission Computers?

What is the engine model of the Bluebird?

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