What are the reasons for no cold air from the car air conditioner?

What is the Difference Between Coating and Crystal Coating?

Automotive crystal coating and regular coating differ in the following aspects: Time Required for Application: Crystal coating typically takes about 5 hours to apply; regular coating takes about 3 hours. Composition of Materials Used: Crystal coating consists of a dense and stable high-molecular inorganic compound; regular coating is made from glass cellulose, silicon polymers, fluorine polymers, and high-purity water-based non-petroleum eco-friendly materials. Duration of Effectiveness: Crystal coating can last up to 3 years; regular coating lasts between half a year to a year. Use a clay bar to remove contaminants from the car's paint surface; apply the material evenly with a sponge; after drying, wipe off excess material with a specialized towel. Types of Materials: Regular coating products are more complex, with three different categories (resin, fluorine, and glass-based), broadly divided into organic and inorganic coatings, where inorganic coatings are significantly more effective than organic ones. The material used in crystal coating is currently less clear, as its crystalline properties classify it as an organic material, meaning crystal coating can be considered a variant of regular coating.

4

Share

What car is the one with 'passat' under the Volkswagen logo?

The model with 'passat' under the Volkswagen logo is the Passat. The Passat has the following dimensions: length 4933mm, width 1836mm, height 1469mm, with a wheelbase of 2871mm. Its fuel tank capacity is 68.5 liters, and the trunk capacity is 521 liters. The Passat is equipped with a 1.4T turbocharged engine, delivering a maximum power of 110 kW at 5000 rpm and a maximum torque of 250 N·m. It is paired with a 7-speed dual-clutch transmission. The front suspension is a MacPherson independent suspension, and the rear suspension is a multi-link independent suspension.

4

0

Share

What should you pay attention to when driving in hot weather?

Do not wear dark sunglasses, avoid fatigued driving, regularly check tire pressure, and refrain from prolonged use of gas lighters or continuous air conditioning. Try to avoid wearing sunglasses if possible. Dark sunglasses can delay the transmission of visual signals to the brain, distorting speed perception and potentially delaying a driver's reaction time. Avoid driving while fatigued. High summer temperatures increase the likelihood of drowsiness. Ensure adequate sleep to maintain alertness. If you feel sleepy while driving, pull over promptly, take a proper break, and resume driving only when fully refreshed.

2

4

Share

How is the quality of Jatco CVT transmission?

Jatco CVT transmission offers moderate quality. It delivers good fuel economy, power performance, and smooth driving experience while reducing emissions and costs. However, its drawbacks include shorter lifespan and lower strength compared to traditional gear transmissions, with the belt being prone to damage. Below is a detailed introduction about automotive transmissions: Overview: A transmission is a device that changes speed ratios and motion direction, typically located between the clutch and the central drive. It can alter the torque, speed, and motion direction transmitted from the driving shaft to the driven shaft under different working conditions. Gear-based transmissions generally consist of a housing and several gears. Classification: Automatic transmissions have become mainstream internationally, mainly including AT, AMT, CVT, and DCT types. Early AT transmission systems primarily used 4AT. AT achieves automatic shifting through an electronically controlled automatic operating system. CVT is a true continuously variable transmission with fewer parts and compact size. DCT features two clutches.

20

5

Share

Why Does Low Engine Oil Pressure Occur?

Reasons for low engine oil pressure include: 1. Insufficient oil; 2. Clogged oil pump screen; 3. Faulty pressure relief valve; 4. Blocked oil filter; 5. Clogged or cracked engine cylinder head or block; 6. Excessive clearance in engine crankshaft, camshaft, or connecting rod main bearings. Engine oil, also known as motor lubricant, consists of base oil and additives. The base oil is the primary component of lubricant, determining its fundamental properties, while additives compensate for and improve any deficiencies in the base oil's performance. Symptoms of low oil pressure include: 1. Increased engine noise; 2. Illumination of the oil warning light. The functions of engine oil are: 1. Reducing friction and high temperatures; 2. Cooling and temperature reduction; 3. Cleaning and purification; 4. Shock absorption and cushioning; 5. Rust and corrosion prevention.

1

4

Share

Are Pirelli Tires Imported or Domestically Produced?

Pirelli tires are available both as imported and domestically produced. Tires are a crucial component of a vehicle, directly impacting driving stability and safety. Introduction to Imported Pirelli Tires: The original production site of Pirelli tires is in Italy. Pirelli tire production is distributed across 24 factories worldwide, including 5 in Italy, 5 in Brazil, 2 in the UK, 2 in Germany, 2 in Turkey, 2 in Romania, 1 in Argentina, 1 in China, 1 in Egypt, 1 in Spain, 1 in the USA, and 1 in Venezuela. Introduction to Domestically Produced Pirelli Tires: Domestically produced Pirelli tires are manufactured in Yanzhou, Shandong Province. The only Pirelli production base in the Asia-Pacific region—Pirelli Tire Co., Ltd.—is located in Yanzhou, Shandong. It is a joint venture between Pirelli and Yanzhou Huaqin Group, with Pirelli holding a 90% stake and the Chinese side owning 10%. Pirelli China's product range includes truck tires, passenger car tires, and high-performance motorcycle tires for racing. Pirelli has stated that the Yanzhou factory became its largest global factory last year.

11

5

Share

What are the reasons for no cold air from the car air conditioner?

What is the Difference Between Coating and Crystal Coating?

What car is the one with 'passat' under the Volkswagen logo?

What should you pay attention to when driving in hot weather?

How is the quality of Jatco CVT transmission?

Why Does Low Engine Oil Pressure Occur?

Are Pirelli Tires Imported or Domestically Produced?

Does a Dash Cam Record Inside the Car?

What are the safety precautions for driving in snowy and icy weather?

What is the reason for the abnormal noise of Mercedes-Benz R320 on bumpy roads?

What Causes Fuel Leakage When the Tank is Full but Not Under Normal Conditions?