What are the methods for repairing air conditioning compressor failures?

Can antifreeze of the same color be mixed?

Antifreeze of the same color cannot be mixed; it is necessary to use the same brand of antifreeze. Different brands of antifreeze may have varying production formulations, and if mixed, chemical reactions may occur between multiple additives, rendering them ineffective. The basic indicators of antifreeze are the freezing point and boiling point. On the market, antifreeze is available with freezing points such as -15°C, -25°C, -30°C, and -40°C. It is generally advisable to choose an antifreeze with a freezing point at least 10°C lower than the lowest temperature in your region. Antifreeze replacement cycle: For vehicles that operate for long periods, such as taxis, high-quality antifreeze should generally be replaced once a year. For vehicles with shorter operating times, replacement can be done every two years or every 30,000 kilometers. To prevent excessive foam formation, which can reduce the heat exchange efficiency between the antifreeze and engine components, ensure that the product is within its validity period when adding it. Long-life antifreeze can have a validity period of up to three years. If suspended matter, sediment, or signs of deterioration or discoloration are found in the antifreeze, the system should be promptly cleaned and the antifreeze replaced.

9

0

Share

What does EV mean in cars?

Here is the relevant introduction about automotive EV: 1. EV refers to pure electric driving mode: The EV button in hybrid vehicles actually indicates the pure electric driving mode, which is a motor-driven mode. Conventional power vehicles (referring to gasoline or diesel cars) do not have this mode. The EV mode is typically equipped in pure electric vehicles or hybrid vehicles. 2. EV represents electric vehicles: At the same time, EV also stands for electric vehicles, which is the abbreviation of Electric-Vehicle. Additional information: 1. In hybrid models, EV can serve as an auxiliary mode: When using hybrid models, the EV button can function as an auxiliary mode rather than the primary driving mode. For short-distance commuting (within 20 kilometers), using the EV mode is not a problem. When the EV mode is activated, the fuel engine in hybrid models does not start, thus unable to charge the battery, resulting in lower range in EV mode. 2. The difference between hybrid models and regular EV models: Hybrid models and regular EV models are fundamentally different. In terms of battery packs, pure EV vehicles have larger capacity battery packs compared to hybrid models, hence hybrid vehicles generally have lower range in EV mode.

13

4

Share

What are the essential items for a car?

Here are the specific explanations of essential items for a new car: 1. Car fire extinguisher: Medium-sized (9 seats and above) and above passenger vehicles and hazardous goods transport vehicles are required to be equipped with fire extinguishers, while other ordinary small passenger vehicles are not mandatory. 2. Dash cam: A dash cam can record the entire driving process of the car, including video images and sound, which can serve as evidence in traffic accidents. 3. Tire pressure gauge: Tires need to be checked frequently, especially when driving on highways. It is very dangerous if the tire pressure deviates significantly from the manufacturer's recommended value. 4. Rearview camera: When the reverse gear is engaged, the system automatically activates the high-definition rearview camera located at the rear of the car, clearly displaying the situation behind the car on the LCD screen.

16

3

Share

Where is the car horn located?

Car horns are generally installed inside the front bumper of the vehicle, and some models require the removal of the front bumper for replacement. Additional information is as follows: 1. Proper use of car horns: On narrow two-lane roads such as country roads or mountain roads, overtaking often requires borrowing the opposite lane. In such cases, it is recommended to honk the horn before overtaking to alert the vehicle in front and avoid accidents. 2. Honking the horn before entering a curve: This can remind the opposite lane to avoid illegally crossing the line. If you receive a horn signal from the opposite direction before a curve, it is advisable to respond with a honk to acknowledge, ensuring both parties are aware of oncoming traffic and can stay within their respective lanes for safe driving.

1

0

Share

What Causes Abnormal Noises in the Car Chassis?

Abnormal noises in the car chassis can be caused by the following reasons: 1. Suspension system: Noises heard when starting the vehicle are usually due to suspension system failures, which may be caused by loose or damaged engine mounts. 2. Steering and suspension systems: Noises during turning may indicate faults in the steering and suspension systems, as the vehicle tilts during turning, causing deformation in the suspension system and involving it in the motion. 3. Brake system components: Noises while driving on good road conditions may be due to faults in the brake system components, such as loose or worn parts, out-of-round brake drums, or uneven brake disc surfaces. 4. Bearings: It could also be an issue with the bearings that connect moving and stationary parts of the vehicle. If it's a bearing problem, the driver can identify it by lightly applying the brakes. If the noise remains unchanged when the vehicle is moving at a constant speed with brakes applied, then it is likely a bearing issue.

16

5

Share

What Taxes Are Required When Purchasing a Car?

A car is a significant purchase, and buying one involves several taxes, including consumption tax, value-added tax (VAT), purchase tax, vehicle and vessel tax, and import tax. Here's a more detailed introduction: 1. Consumption Tax: In fact, most consumer goods in daily life are subject to consumption tax, but many people are unaware that this is an included tax, embedded in the price. The same applies to cars. Before a car even leaves the factory, the manufacturer must pay the consumption tax, which is ultimately passed on to the consumer. 2. Value-Added Tax (VAT): This cost is already included in the car's price in advance. VAT is levied on the added value of goods during the circulation process. The VAT for motor vehicles = total car price ÷ 1.17 (tax basis) × 17%. VAT is a tax imposed on car dealers after they sell a car and is targeted at the dealers. 3. Purchase Tax: This is a tax paid by the car owner after acquiring the vehicle. Whether through purchase, winning a prize, or any other means, as long as ownership is obtained, this tax must be paid. Vehicle purchase tax = tax basis × 10%. For vehicles with an engine displacement below 1.6 liters, the rate was previously 5%. 4. Vehicle and Vessel Tax The vehicle and vessel tax varies by province, and the annual amount depends on the car's engine displacement. This tax applies only to vehicles and vessels and is a mandatory fee when purchasing insurance for a new car. It must be paid annually and is a form of property tax. The rates were adjusted in 2017, making them lower than before. 5. Import Tax: Buying an imported car also requires paying an import tax, which was previously 25% but is said to be reduced to 15% in the future.

2

1

Share

What are the methods for repairing air conditioning compressor failures?

Can antifreeze of the same color be mixed?

What does EV mean in cars?

What are the essential items for a car?

Where is the car horn located?

What Causes Abnormal Noises in the Car Chassis?

What Taxes Are Required When Purchasing a Car?

Should You Shift to Neutral When Stopping at Traffic Lights?

What Causes Poor Cooling in Car Air Conditioning During Summer?

What is the difference between maintenance at a 4S shop and outside maintenance?

How many items are tested in Subject 3?