What to Pay Attention to When Driving

Why Does the Car Make Loud Noise When Running the Air Conditioner at Low Speed?

There are several main reasons why a car makes loud noise when running the air conditioner at low speed: 1. The air conditioner filter is too dirty, causing excessive noise. 2. There are foreign objects in the blower fan blades. You can try turning on the blower without starting the engine to see if the noise occurs. If the noise appears, it proves the problem lies with the blower. 3. The car's air conditioner fan blades are deformed or the fan motor is damaged. 4. The clutch bearing inside the air conditioner pump is worn, causing the engine noise to increase when the air conditioner is on. This component cannot be replaced separately; the entire air conditioner pump assembly needs to be replaced. 5. Excessive refrigerant (Freon) content. If the refrigerant level is too high, the compressor's load will increase, leading to higher overall load. Check the air conditioner's sight glass: if liquid flows through the window with a few bubbles when the air conditioner is on, the refrigerant level is normal. If there are no bubbles or very few, it indicates an excessive amount.

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How to Set the Time on the Highlander Small Screen?

Steps to set the time on the Highlander small screen are as follows: 1. First, press the start button to start the vehicle; 2. Next, locate the "Settings" button on the dashboard and begin adjusting the time; 3. Then, use the volume control on the left side of the multifunction small keyboard to increase or decrease the time to adjust it to the correct display; 4. After that, click the "OK" button on the right side of the multifunction steering wheel to confirm the time adjustment and return to the main interface; 5. Finally, once the time is adjusted, the operation is complete. The Highlander is a vehicle produced by Toyota, a large-sized SUV in the Toyota family. It features a spacious body and an innovative, roomy interior.

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Where is Chaoyang Tires produced?

Chaoyang Tires are produced in the New District of Wuxi City, Jiangsu Province. Chaoyang Tires is one of the brands under Zhongce Rubber Group Co., Ltd., which was established in 1966 and has been dedicated to the production and manufacturing of tires and rubber products. Chaoyang Tires currently cover a wide range of products, including passenger car tires, commercial vehicle tires, engineering vehicle tires, industrial and agricultural vehicle tires, and two-wheeler tires. The Chaoyang brand all-steel radial tires have been awarded the title of "China Famous Brand," ranked among the top ten in the global tire industry, and have obtained the U.S. Environmental Protection Agency's Smartway certification, achieving international advanced standards. Chaoyang Tires feature a unique "Three-in-One Technology" that simultaneously ensures safety, fuel efficiency, and quiet performance. Additionally, they offer strong stability, with overall balanced performance across various aspects. As a domestic brand, price is its biggest advantage, offering high cost-effectiveness—often only half the price of Michelin tires for the same model. Although the comfort and quietness may not match Michelin's standards, they are more than sufficient for everyday driving.

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Spark Plug Replacement Interval for Cars?

Under normal maintenance conditions, spark plugs should be replaced every 40,000 to 60,000 kilometers. However, this may vary depending on the brand and engine type, so it is recommended to follow the vehicle's user manual. The following standards can be referenced for maintenance and replacement: Platinum spark plugs should be replaced at 40,000 kilometers, standard nickel alloy spark plugs at 20,000 kilometers, and iridium spark plugs at 60,000 to 80,000 kilometers. Methods to determine if a spark plug is damaged: Remove the spark plug and inspect its appearance to assess its condition. A normal spark plug will have an insulator skirt and electrodes that appear grayish-white, grayish-yellow, or light brown. A properly functioning spark plug will have a reddish-brown insulator skirt, an electrode gap between 0.8-0.9mm, and no signs of electrode burn. If the spark plug is covered in oil or deposits but not damaged, it can continue to be used after cleaning off the oil and deposits. If the spark plug is severely damaged—showing signs of blistering, black streaks, cracks, melted electrodes, etc.—the cause of the damage should be identified and the issue resolved before replacing the spark plug. Additionally, if the spark plug appears blackened as if smoked, it indicates the wrong heat range was selected, the air-fuel mixture is too rich, or engine oil is leaking into the combustion chamber.

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What Do Engine Oil Codes Mean?

The meaning of engine oil codes is as follows: Engine oil codes are divided into two categories, one is the oil viscosity, and the other is the oil grade. (1) Viscosity index: Generally, the SAE standard is used as the international standard, which is what we commonly refer to as 5W-20, 5W-30. The specific meanings are: The first number represents the low-temperature viscosity index, indicating the minimum working temperature at which the oil can function. (2) Grade index: In China, the API standard is generally used, divided into API SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM, SN, SP; Those starting with the letter "C" represent oils for diesel engines, with specifications including: API CA, CB, CC, CD, CE, CF, CF-2, CF-4, CG-4, CH-4, CI-4. If both are present, such as SM/CF, it indicates that the oil is suitable for both gasoline and diesel engines. This involves the oil's quality, shelf life, impurity content, etc. The later the grade, the higher the level, the better the quality, and the more expensive it is. This is what is commonly referred to as the standard for full synthetic and semi-synthetic oils. Generally, oils before SL are mineral oils, SM is semi-synthetic oil, SN and above are full synthetic oils, with the current highest grade being SP. Additionally, the European ACEA (European Automobile Manufacturers' Association) has established another set of standards, which are more stringent.

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How to Identify the Manufacturing Date of Tires?

Identifying the manufacturing date of tires can be done as follows: 1. The production date of the tire is marked on the outer side of the tire, without having to flip the tire, it's right on the outside. 2. On one side of the tire wall, there is a set of numbers, from which the last four digits can provide information about the production date. 3. It consists of four digits "AABB". The first two digits "AA" indicate the week of the year, and the last two digits "BB" indicate the year. The 11-digit number and letters immediately following the "DOT" letters on the side of the tire represent the identification number or serial number of the tire, with the last four digits of the serial number indicating the production date of the tire. The tire production date code format: the first two digits represent the production week, and the last two digits represent the production year. For example, if the last four digits of DOT are 4117, it means the production date was in the 41st week of 2017.

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What to Pay Attention to When Driving

Why Does the Car Make Loud Noise When Running the Air Conditioner at Low Speed?

How to Set the Time on the Highlander Small Screen?

Where is Chaoyang Tires produced?

Spark Plug Replacement Interval for Cars?

What Do Engine Oil Codes Mean?

How to Identify the Manufacturing Date of Tires?

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