What are the steps to restart the engine after stalling on a slope?

How Long Does It Take to Repair an Engine?

Repair time for an engine depends on the extent of damage. A standard repair typically takes one day, while a major overhaul may require up to three days. A major engine overhaul involves the adjustment or replacement of core components such as pistons, piston rings, cylinder liners, crankshafts, bearings, rocker arms, valves, and push rods. After a major overhaul, the engine's performance can be restored to its optimal state. Proper break-in is necessary post-overhaul to ensure better working conditions and improved power output. Indicators that an engine requires a major overhaul: Severe oil consumption with blue smoke emission: Insufficient oil leads to abnormal engine wear, causing blue smoke emission. Normally, blue smoke results from two causes—aged valve stem seals or excessive clearance between pistons and cylinder walls. If blue smoke is due to worn valve stem seals, replacing them suffices. However, if excessive piston-cylinder clearance is the cause, a major overhaul is necessary. Excessive black smoke emission: If inspection reveals severe black smoke, a major overhaul is warranted. Measuring cylinder pressure with a compression gauge can confirm this—if readings are abnormally low, the engine requires a major overhaul.

3

Share

Is it necessary to go to a 4S shop for maintenance?

Maintenance can be chosen to be done at a 4S shop or an external repair shop based on personal needs. However, maintenance involving the electrical system should still be done at a 4S shop. Here are the relevant details: 1. Choosing a maintenance location: Even during the warranty period, car owners can choose where to have their cars maintained. Maintenance outside a 4S shop does not void the warranty, thereby reducing maintenance costs. However, there are practical risks, such as the need to retain maintenance invoices, repair records, and certificates for replaced parts. For new cars, it's advisable to go to a 4S shop for maintenance until the warranty expires before switching to an external repair shop. If you plan to maintain a new car externally, ensure you choose a reputable repair shop that can provide relevant documentation. 2. Considerations: Additionally, when maintaining at a repair shop, try to avoid too many procedures. For instance, modern car electronic control systems are highly advanced. Many cars require specialized diagnostic tools to reset after cleaning the throttle body; otherwise, issues like unstable idling may occur. Such specialized tools are generally not available at ordinary repair shops. Therefore, maintenance procedures at repair shops should be kept as simple as possible, and maintenance involving the electrical system should still be done at a 4S shop.

7

2

Share

What is the Function of Automotive Radar?

Automotive radar, as the name suggests, is radar used for automobiles or other ground motor vehicles. Therefore, it includes various types of radar based on different technologies (such as laser, ultrasonic, and microwave), with different functions (such as obstacle detection, collision prediction, adaptive cruise control), and employing different working principles (such as pulse radar, FMCW radar, and microwave impact radar). Microwave radar holds significant commercial importance in automotive radar. Below is a detailed introduction to automotive radar: 1. Speed Measurement Radar: It can measure the speed of the vehicle by detecting the rotation speed of the wheels. 2. Obstacle Detection Radar: This type of radar can observe the terrain in conditions of low or no visibility and alert the driver to prevent accidents. 3. Adaptive Cruise Control Radar: It can adapt to the surrounding environment of the vehicle and maintain a safe speed based on the speed of the vehicle and the one ahead. 4. Collision Avoidance Radar: This radar can measure potential hazardous obstacles on the road ahead that may cause a collision based on the vehicle's current direction and speed. It is suitable for situations with low atmospheric visibility and poor judgment (such as too short a distance or too high a speed). The purpose is to warn the driver to deploy airbags or other braking devices and control the vehicle's speed.

9

5

Share

Will Touching the Line in Subject Two Result in Failure?

Even if touching the line during the exam is judged as a failure, the onboard voice system will not announce it. The candidate can continue to complete the remaining items. After all items are completed, the system will announce "Exam ended, result passed" or "Exam ended, result failed". Below is some information about the driving test: 1. Subject One: Road traffic safety laws, regulations, and related knowledge test, written test, computer-based, full score of 100, 90 or above is a pass (including 90). 2. Subject Two: Field driving skills test, on-site vehicle operation, only pass or fail, including reversing into a garage, parallel parking, S-curve, right-angle turn, and hill start and stop. These five items are mandatory and conducted in sequence, full score of 100, 80 or above is a pass (including 80). 3. Subject Three: Road driving skills test, actual vehicle operation on roads or simulated sites, full score of 100, 90 or above for large buses, 80 or above for large trucks, and 70 or above for other vehicle types is a pass. 4. Subject Four: Safe and civilized driving-related knowledge, written test, full score of 100, 90 or above is a pass (including 90).

18

5

Share

Can You Wash a Car After It's Been Exposed to the Sun?

It is not advisable to wash a car after it has been exposed to the sun. During summer, when a vehicle is driven outside and subjected to high temperatures, the surface temperature of the car body becomes very high. Washing the car with cold water at this time can cause significant damage to the paint surface, potentially leading to cracking or bubbling of the paint. Additionally, the sudden temperature difference can affect the internal machinery of the car, possibly causing cracks in metal components, which may impair the vehicle's normal operation. Here are some precautions for car washing: 1. Avoid washing the car under direct sunlight: Do not wash the car in the sun or leave it in the sun after washing. Water droplets left on the car act like convex lenses, focusing sunlight onto the paint and causing damage. Moreover, uneven evaporation of water can lead to uneven heating of the car body, with localized areas becoming excessively hot. Over time, this can damage the paint, resulting in a dull appearance. 2. Do not wash the car too frequently: Excessive washing is harmful to the car's paint. For cars that have been waxed or coated, frequent washing can wear away the protective layer, accelerating paint aging without protection. It is recommended to wash the car once every ten days or half a month, as washing too often is not only harmful but also a waste of money.

7

0

Share

What is the Appropriate Braking Distance?

Braking distance of 45-60 meters is appropriate. Suspension System: During emergency braking, the vehicle's center of gravity shifts forward, compressing the front suspension. If the front suspension lacks sufficient support, the excessive forward shift of the center of gravity can reduce the adhesion of the rear wheels, weakening their braking effect and increasing the braking distance. Some vehicles exhibit severe front-end dipping during braking, which is a sign of poor front suspension support. Vehicle Weight: The greater the weight of the car, the greater the inertia, making it harder to stop. Therefore, vehicle weight has a direct impact on braking distance. However, heavier cars do not always have longer braking distances than lighter ones. For example, some performance cars weigh significantly more than family A-segment cars but have much better braking performance, as factors like tires and braking systems also play a role. The influence of vehicle weight on braking distance is mainly seen in the same car under the same braking system—the greater the load, the longer the braking distance. Tires: Tires are the medium through which the braking system operates. The better the tire adhesion, the more braking force can be generated during braking, thereby shortening the braking distance. For general family cars, the main factor affecting braking distance is tire width. Wider tires have a larger contact area, providing greater braking force.

3

5

Share

What are the steps to restart the engine after stalling on a slope?

How Long Does It Take to Repair an Engine?

Is it necessary to go to a 4S shop for maintenance?

What is the Function of Automotive Radar?

Will Touching the Line in Subject Two Result in Failure?

Can You Wash a Car After It's Been Exposed to the Sun?

What is the Appropriate Braking Distance?

At what level of aging must car tires be replaced?

What Should You Pay Attention to When Driving a New Car?

Which side of the steering wheel is the windshield wiper on?

Is a car tire temperature of 65 degrees Celsius high?