Why is Vellfire cheaper than Alphard?

What are the methods for testing the quality of engine oil?

There are several methods for testing the quality of engine oil: 1. Check the composition of the oil: Engine oils can be categorized into four types based on their composition: full synthetic, semi-synthetic, mineral synthetic, and mineral oil. Full synthetic oil is of higher quality because it has superior cleaning properties, keeps the engine cylinder cleaner during use, allows for smoother cold starts, improves fuel efficiency, has a longer replacement cycle, and provides lubrication effectiveness equivalent to 1.5 times or more that of conventional lubricants. 2. Observe the color of the oil: Imported engine oil is typically golden with a slight blue tint and is crystal clear. Genuine bulk oil is usually light blue with a bright luster and flows evenly. Any oil with uneven color or streaks of different colors during flow is likely counterfeit or deteriorated, and using such oil can severely damage the engine. 3. Smell the oil: Qualified engine oil should have no strong odor, only a slight aromatic scent. If the oil has a pungent smell, especially a strong fuel odor, it is likely recycled oil. 4. Inspect the oil: Perform a drop test by placing a drop of oil from the oil pan onto white paper. Observe the oil drop. If the center of the drop has a large, dark brown spot that is uniform without particles and the surrounding yellow area is very small, it indicates that the oil has deteriorated and should be replaced.

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What to Do for the Second Maintenance?

Items for the second maintenance of a car include: 1. Change the engine oil, oil filter, and fuel filter. 2. Check if the tire pressure is normal. 3. Inspect whether the suspension arms and shock absorbers are securely fixed and functioning properly, and ensure the wheel hub bearings do not overheat after driving. 4. Check if the steering free play and toe-in meet the requirements. The steering should be light, flexible, and reliable, with no lateral wobble or deviation of the front wheels during driving. 5. Verify that the clutch free play meets the requirements. The clutch should operate smoothly, disengage completely, engage steadily and reliably, with no abnormal noises, and the hydraulic system should not leak. 6. Inspect the transmission, drive axle, or half-shaft drive device for good lubrication, secure connections, no abnormal noises or overheating, smooth gear shifting, and no oil leaks. 7. Check if the brake pedal free play and brake clearance meet the requirements. The service and parking brakes should function well, with no deviation or dragging during braking, and the inertia proportioning valve should work normally without leaks. 8. Examine the generator, starter, lights, instruments, signal lights, buttons, switches, and other auxiliary equipment to ensure they are complete and functioning normally. Lubricate all lubrication points of the vehicle. Replace the air filter, cabin air filter, and add brake fluid, power steering fluid, antifreeze, etc.

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Why is there no specific time when scheduling Subject 1?

Scheduling Subject 1 does not have fixed time slots for some test centers, so after successfully scheduling Subject 1, the SMS notification or the Traffic Management 12123 App will only show which session it is, without specifying the exact time. You can estimate the exam time based on the session. Subject 1 exam session schedule: Subject 1 first session exam time is 9:00; Subject 1 second session exam time is 10:00; Subject 1 third session exam time is 13:00; Subject 1 fourth session exam time is 14:00; Subject 1 fifth session exam time is 15:00. Subject 1 is also known as Subject 1 theory test or driver theory test, which is part of the motor vehicle driver's license assessment. The total time for the Subject 1 exam is 45 minutes. The exam paper consists of 100 questions, including true/false and multiple-choice questions, with a full score of 100 and a passing score of 90. The exam paper is randomly selected and combined by the computer driver examination system according to the proportion specified in the "Motor Vehicle Driver's License Work Regulations."

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What are the common specifications and models of car tires?

Common specifications and models of car tires are 205/55R16, 185/65R15, and 185/65R14. The first numbers 205 and 185 represent the tire width in millimeters. The numbers 65 and 55 indicate the aspect ratio of the tire's cross-section, which is 65% and 55% respectively, meaning the height of the cross-section is 65% or 55% of the width. The numbers 14, 15, and 16 represent the rim diameter in inches. The letter "R" in the middle stands for radial tire. Tires also have speed rating letters, indicating the maximum speed at which the tire can carry a specified load under defined conditions. Letters from A to Z represent certified speed ratings ranging from 4.8 km/h to 300 km/h. Generally, the size of car tires varies depending on the actual configuration of the vehicle. International standard tire codes use millimeters as the unit to denote the cross-section height and aspect ratio percentage. These are followed by several components: the tire type code, rim diameter, load index (also known as the allowable load mass code), and the allowable speed code. Tires are crucial components of a car, with over 10 types of markings on them. Correctly identifying these markings is essential for selecting, using, and maintaining tires, ensuring driving safety and prolonging tire life. Typically mounted on metal rims, tires support the vehicle body, cushion external impacts, ensure contact with the road, and maintain driving performance. Tires operate under complex and demanding conditions, enduring various deformations, loads, forces, and temperature extremes. Thus, they must possess high load-bearing, traction, and cushioning capabilities, along with high wear resistance, flexibility, and low rolling resistance and heat generation. Tire specifications: Specifications are data indicating the geometric parameters and physical properties of a tire. There are three methods to denote tire specifications: A. Metric (m); B. Mixed metric and imperial; C. Imperial. Imperial tire specifications are usually represented by a set of numbers, where the first number indicates the tire cross-section width, and the second number denotes the rim diameter, both in inches. Tires can be classified into approximately 8 types based on vehicle categories: PC—Passenger car tires; LT—Light truck tires; TB—Truck and bus tires; AG—Agricultural vehicle tires; OTR—Off-the-road tires; ID—Industrial vehicle tires; AC—Aircraft tires; MC—Motorcycle tires. Structurally, tires can be divided into bias-ply tires and radial tires. Modern cars predominantly use radial tires, denoted by the letter R, while bias-ply tires are denoted by D. The fundamental difference lies in the carcass: bias-ply tires have crisscrossed layers of fabric, whereas radial tires have multiple layers of polymer materials with steel belt layers on top, reducing the likelihood of punctures by foreign objects.

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What are the causes of excessive water temperature in diesel engines?

The reasons that cause the engine water temperature to be too high include: 1. Insufficient coolant: Prolonged water circulation during engine operation can gradually deplete the coolant in the engine's cooling system, leading to a shortage of water in the radiator. If the owner fails to promptly inspect and replenish the coolant, it can easily result in the engine overheating. 2. Radiator leakage: Broken or improperly connected radiator hoses can cause leaks, obstructing water circulation and potentially leading to the engine "boiling over," which is indicated by white smoke. 3. Cooling fan malfunction: A damaged cooling fan or a short circuit in the wiring can prevent the fan from operating or cause it to rotate slowly, preventing the engine's heat from dissipating and naturally raising the water temperature. 4. Thermostat failure: The thermostat controls the flow path of the coolant. If it becomes stuck or fails, the engine's large and small circulation will inevitably be affected, making it impossible to effectively dissipate the engine's heat.

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What is the refund policy after completing Subject 1?

As there is no unified regulation, the refund is generally processed according to the relevant notices of the traffic management bureau. If the training institution fails to arrange for the trainee to participate in Subject 2 training within 60 days, the full training fee will be refunded. If the trainee fails to participate in Subject 2 training due to personal reasons, the training fee will be refunded after deducting the costs of training materials, theoretical training, and auxiliary materials. The scope of Subject 1 examination is as follows: Subject 1 is an examination on road traffic safety laws, regulations, and related knowledge. The examination content includes road traffic rules, traffic signals, handling of traffic safety violations and accidents, application and use of motor vehicle driving licenses, motor vehicle registration regulations, and other road traffic safety laws, regulations, and rules. The description of Subject 1 examination is as follows: Subject 1 examination is limited to 45 minutes, with 5 sessions scheduled daily. Information registration is required before entering the examination room. The examination paper consists of 100 questions, selected randomly and combined by the computer driver examination system according to the proportion specified in the "Motor Vehicle Driving License Work Regulations" from a total of 1229 questions in the Subject 1 question bank.

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Why is Vellfire cheaper than Alphard?

What are the methods for testing the quality of engine oil?

What to Do for the Second Maintenance?

Why is there no specific time when scheduling Subject 1?

What are the common specifications and models of car tires?

What are the causes of excessive water temperature in diesel engines?

What is the refund policy after completing Subject 1?

Where is the CHR tire pressure monitoring located?

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How to eliminate the airbag light on Baojun 510?

How to use the auto start-stop function in Volkswagen Sagitar?