What Causes Vibration When Braking?

Do Family Cars Belong to Passenger Vehicles?

Family sedans fall under the category of small passenger vehicles. Small passenger vehicles generally refer to compact cars designed to carry people, specifically small buses with a seating capacity of 2–9 passengers. These typically include sports cars, sedans, and microvans. Due to their compact size, they are highly suitable for both family and organizational use. Automobiles can generally be classified into six categories based on their purpose: 1. Sedans: Also known as small passenger cars, they usually have no more than nine seats (including the driver's seat). 2. Buses: Vehicles with nine or more seats (including the driver's seat), such as city buses, long-distance coaches, and tourist buses. 3. Trucks: Commonly referred to as lorries, primarily used for transporting goods. 4. Tractors: Specifically designed for towing trailers or semi-trailers. 5. Specialized transport vehicles: Designed to meet specific cargo transportation requirements, equipped with specialized compartments and corresponding auxiliary equipment, such as dump trucks, tankers, refrigerated trucks, bulk cement trucks, and container trucks. 6. Special-purpose vehicles: Mainly used for performing other tasks, such as ambulances, fire trucks, garbage trucks, sprinkler trucks, and various engineering vehicles.

19

3

Share

What is the difference between Castrol 30 and 40?

The numbers 40 and 30 after 5W represent viscosity, with higher numbers indicating greater viscosity and suitability for higher maximum temperatures. In other words, 5W40 can adapt to higher temperature environments compared to 5W30, and higher viscosity oils (with higher values) may also be more suitable for high-speed driving or heavy-duty vehicles. Relevant information about engine oil is as follows: 1. Introduction: Engine oil, also known as engine lubricant (English name: Engine-oil), has a density of approximately 0.91×10³ (kg/m³). It serves to lubricate and reduce wear, assist in cooling, seal against leaks, prevent rust and corrosion, and provide shock absorption for the engine. It is often referred to as the 'blood' of a car. 2. Composition: Engine oil consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve any shortcomings in the base oil's performance, imparting new characteristics, making them an essential part of lubricating oil.

19

2

Share

How often should the brake fluid be replaced for Cadillac CT5?

Cadillac CT5 brake fluid replacement cycle is 30,000 kilometers. Brake fluid is the liquid used in the hydraulic braking system, which must not undergo chemical reactions, be unaffected by high temperatures, and should not cause corrosion, softening, or expansion to metals and rubber. Methods to determine if brake fluid needs replacement: 1. Visual Inspection: Open the brake fluid reservoir cap. If the brake fluid has become cloudy or black, do not hesitate and replace it immediately to avoid major issues. 2. Hard Braking Method: Drive the car normally to a speed above 40KM/H, then apply hard braking. If the braking distance is significantly longer, it can be concluded that there is a problem with the brake fluid, and it should be checked for replacement. 3. Soft or Unstable Braking During Normal Driving: If the brake pedal feels soft when pressed, it is time to consider replacing the brake fluid. If the brake fluid deteriorates, it will make the brake pedal feel spongy even when fully depressed. Frequent braking generates high temperatures, turning absorbed water in the brake fluid into steam and creating bubbles, leading to unstable braking force.

14

1

Share

What does Castrol A3B4 mean?

Castrol is a brand of engine oil, and A3B4 is the model number. 'A' represents gasoline engine oil, with types such as A1, A3, A5, etc., while 'B' represents light-duty diesel engine oil, with types like B1, B3, B4, B5, etc. The higher the number, the higher the grade. A3B4 is a dual-purpose oil for both gasoline engines and light-duty diesel engines, with a relatively high grade. Relevant information about engine oil is as follows: 1. Introduction: Engine oil, also known as engine lubricant (English name: Engine-oil), has a density of approximately 0.91×10³ (kg/m³). It lubricates and reduces friction in the engine, assists in cooling, seals against leaks, prevents rust and corrosion, and provides shock absorption. It is often referred to as the 'blood' of a car. 2. Composition: Engine oil consists of base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties. Additives compensate for and improve the shortcomings of the base oil, imparting new properties, and are an important part of lubricating oil.

20

1

Share

What is the reason for the bulb indicator light in a Volkswagen car being on?

Volkswagen car dashboard displaying a bulb icon indicates a lighting system malfunction. Below is expanded information on headlights not working: 1. Symptom: When the light switch is turned to position 2 or 3, the small lights and dashboard work normally, but both high and low beams of the headlights do not illuminate. 2. Possible causes: The main reasons for lights not working include bulb failure, fuse blowout, damage to the light switch or relay, and open or short circuits in the wiring. 3. Diagnosis: Turn the light switch to the headlight position and use a test light to check the "power" terminal of the dimmer switch. If the test light does not illuminate, check the corresponding terminal of the light switch with the test light; if the test light illuminates, it indicates an open circuit in the wire between the two switches; if the test light does not illuminate, the light switch is damaged. When checking the terminals of the dimmer switch, if the test light illuminates, the dimmer switch is damaged. Use wires to connect the "power" terminal of the dimmer switch to the high and low beam terminals respectively; at this point, both high and low beams should light up.

15

1

Share

What Size Tire Fits a 19-Inch Wheel?

19-inch wheels can be fitted with 235/55R19 tires. Below are some precautions regarding wheel usage: 1. Wheel Bearings: To ensure maximum safety and reliability, it is recommended to regularly inspect wheel bearings regardless of the vehicle's age—watch for early warning signs of wear, such as any friction noise during rotation or abnormal deceleration of the suspension assembly during turns. For rear-wheel-drive vehicles, it is advised to lubricate the front wheel bearings when the vehicle reaches 38,000 kilometers. 2. Brake System Replacement: When replacing the brake system, check the bearings and replace the oil seals. 3. Noise: If you hear noise from the wheel bearing area, it is important to identify the source. Many moving parts can produce noise, or it may be due to contact between rotating and non-rotating components. If the noise is confirmed to come from the bearing, the bearing may be damaged and require replacement. 4. Wear: When the tread wears to a certain extent, the tire should be replaced promptly. A friendly reminder to all drivers: the tread is the most worn part of the tire, and once it is worn smooth, it can no longer prevent tire slippage. Therefore, each tire has more than four wear indicators in the tread grooves. When the tread wear exceeds these indicators, the tire must be replaced to avoid situations like vehicle skidding during driving, which poses a significant threat to the driver's safety.

18

1

Share

What Causes Vibration When Braking?

Do Family Cars Belong to Passenger Vehicles?

What is the difference between Castrol 30 and 40?

How often should the brake fluid be replaced for Cadillac CT5?

What does Castrol A3B4 mean?

What is the reason for the bulb indicator light in a Volkswagen car being on?

What Size Tire Fits a 19-Inch Wheel?

What Does a Four-Cylinder Engine Mean?

Which country produces the engines for Hongqi cars?

How many years after purchase does a family car require two inspections per year?

What does 380tsi mean at the back of a Volkswagen?