What is the purpose of an automobile repair and maintenance detailed list?

What is the diameter of a 19-inch tire in centimeters?

19-inch wheels have a diameter of 48.26 centimeters. First, 1 inch equals 2.54 centimeters, so a 19-inch wheel converts to 48.26 centimeters. 19-inch tires have the following characteristics: Larger wheels: This means larger tires, which provide better shock absorption for the car, improving ride comfort on rough roads. However, tires on larger wheels are more prone to bulging, as thinner tires have reduced impact absorption, making them more susceptible to damage and bulging under significant impacts. Improved handling: Larger wheels have a greater contact area with the ground, increasing friction and enhancing grip, which makes driving easier and significantly improves handling. Larger wheels can accommodate bigger brake systems. The increased inner space allows for larger brake discs and multi-piston calipers, effectively boosting braking performance. However, larger wheels compromise comfort, as thinner tires are less effective at isolating road noise and vibrations, leading to increased road noise and bumpiness. Smaller tires: These are safer. In the event of a tire blowout, cars with larger wheels experience less diameter reduction compared to those with smaller wheels, making them safer and potentially life-saving on highways. Smaller wheels offer better comfort, as thinner tires are more effective at isolating road noise and vibrations.

12

4

Share

Why Should Wiper Blades Be Lifted Up?

It is to maximize the lifespan of the wiper blades. Functions of lifting wiper blades: In summer, the weather is quite hot, and the thin rubber blades of the wipers are prone to deformation and aging under prolonged high temperatures. Over time, they may fail to clean rainwater effectively, increasing the risk of accidents. In winter, due to low temperatures, snow can cause the wipers and windshield to freeze together. Winter windshield washer fluid has an ice-melting effect, but it only sprays when the wipers are operating. Therefore, if the wipers are frozen, the washer fluid cannot be sprayed, preventing timely and effective ice removal. Precautions: In winter, do not use the wipers to clean the windshield first thing in the morning. Rashly turning on the wipers may tear the rubber surface of the blades, rendering them ineffective, or even damage the wiper motor. To melt ice, never pour hot water directly onto the windshield, as the temperature difference may cause it to crack. The correct method is to turn on the air conditioning, set it to hot air, activate the defrost and defog functions, and let the car warm up slowly to melt the ice.

18

5

Share

Why does the engine speed increase but the car speed doesn't when stepping on the accelerator?

When the engine speed increases but the car speed doesn't when stepping on the accelerator, it may be caused by slipping due to worn clutch plates. Here are specific details about engine speed: 1. 800/min~1200/min: During cold starts, if the idle speed is below 800/min or above 1200/min, it indicates poor engine condition. 2. Below 2000r/min: Try to avoid letting the engine operate below 2000r/min while driving. If the speed is too low, the engine will lack power, and the excessive load at low speeds can damage the engine and easily lead to carbon buildup. 3. Above 4000r/min: When the engine operates above 4000r/min, the combustion time shortens, leading to incomplete fuel combustion and a significant increase in fuel consumption. If driving normally in fifth gear, the speed usually reaches 150km/h, which is already a relatively dangerous speed. 4. 2200~3500r/min: The engine operates most economically and performs best within the 2200~3500r/min range. It is advisable to maintain the engine speed within this range during regular use.

16

0

Share

Is the Anti-Rain Film for Car Rearview Mirrors Effective?

Rearview mirror anti-rain films have excellent hydrophobic properties, effectively preventing rainwater from adhering and avoiding obstruction of the rearview vision, thereby enhancing driving safety in rainy conditions. High-quality films offer superior clarity and come with additional functionalities such as water resistance, anti-fog, dustproof, scratch resistance, and fingerprint resistance, ensuring the mirror surface remains clear at all times and alleviating the issue of blurred rearview mirrors during rain. However, if the anti-rain film is not applied correctly during installation, such as containing air bubbles, it can cause visual distortion and affect the rearview effect. Steps to apply the anti-rain film to car rearview mirrors: Clean the rearview mirror thoroughly and wet it with water; peel off the adhesive side of the waterproof film and place it at the center of the rearview mirror; remove any internal bubbles and peel off the surface layer. Other rain prevention methods include: Installing rain guards on the rearview mirrors to block rainwater and prevent it from dripping onto the mirror surface; or before driving in the rain, applying soap evenly on the car's rearview mirrors, letting it harden, and then wiping it off with a towel. This creates a wax layer on the glass surface with excellent water-repellent properties, effectively preventing water droplets and fog from adhering to the rearview mirror.

8

2

Share

How to resolve the malfunction of Audi high beam assist?

It is necessary to take the vehicle to a repair facility where professional diagnostic equipment can be used to read the fault codes stored in the system. Further determine the cause of the malfunction, and through data measurement and comparison, identify the root cause of the issue and implement the necessary repairs. Below is additional information: 1. Causes of malfunction: Audi headlights generally use a four-lamp system, and the main cause of failure in such systems is often the use of bulbs with excessively high power. Of course, many owners purchase lower-quality bulbs from the market for replacement, leading to insufficient wattage. Some may intentionally install higher-power bulbs to achieve greater brightness, all of which can cause headlight malfunctions. 2. Inspection: Check whether the Audi headlights have any cracks, as although surface cracks may not affect the lighting performance, moisture can seep into the lamp assembly along the cracks, which will inevitably reduce the bulb's lifespan. The calibration of the headlight beam direction should also be included in the maintenance checklist. To ensure maximum driving safety, the headlights must provide adequate forward illumination for the vehicle. While focusing on the key aspects, do not forget to inspect other lighting systems, such as turn signals, license plate lights, marker lights, parking lights, reverse lights, and brake lights.

2

1

Share

Can the car air conditioner cool without starting the engine?

Ordinary fuel-powered cars cannot cool without starting the engine because their air conditioning systems rely on the engine to operate. If the car is not started, the air conditioner cannot be used. Electric vehicles, however, can run the air conditioner without starting the car. When the car is not started, the air conditioner switch can be turned on, but the air conditioner does not function—only the fan operates. This is because the air conditioner requires significant power, which the car battery cannot sustain. Therefore, if the engine is not running, the air conditioner automatically enters protection mode and cannot work. The car air conditioning system is designed to cool, heat, ventilate, and purify the air inside the cabin. It provides a comfortable environment for passengers, reduces driver fatigue, and enhances driving safety. Different types of air conditioning systems have varying layouts. Passenger cars commonly use an integrated heating and cooling system, where components like the evaporator, heater core, centrifugal blower, and control mechanisms are assembled together, forming the air conditioning unit. The car air conditioning controller is a control device for the car's air conditioning equipment. It regulates the air conditioning system, offering cooling, ventilation, and defrosting functions. All components are securely installed, with control devices and operating mechanisms functioning smoothly and safely.

1

5

Share

What is the purpose of an automobile repair and maintenance detailed list?

What is the diameter of a 19-inch tire in centimeters?

Why Should Wiper Blades Be Lifted Up?

Why does the engine speed increase but the car speed doesn't when stepping on the accelerator?

Is the Anti-Rain Film for Car Rearview Mirrors Effective?

How to resolve the malfunction of Audi high beam assist?

Can the car air conditioner cool without starting the engine?

How to Shift to Neutral (N) Gear in a BMW Without Ignition?

Why does the diesel heater keep flashing but not starting?

How many kilometers should the FAW J6P wheel hubs be driven before maintenance?

Can a Yue B license plate be transferred to someone else?