What to Do When Water Enters the Car Exhaust Pipe?

What is the National Vehicle Emission Standard?

Vehicle emission standards refer to the harmful gases emitted from vehicle exhaust, such as CO (carbon monoxide), HC+NOx (hydrocarbons and nitrogen oxides), and PM (particulate matter, soot). Here is extended information on how to check vehicle emission standards: 1. Vehicle Conformity Certificate: When purchasing a car, it is essential to request relevant documents and certificates from the salesperson. The Vehicle Conformity Certificate clearly states the vehicle's emission standard. Although it may not explicitly mention whether the vehicle meets China 5 or China 6 standards, the emission standard listed can help determine whether it is a China 5 or China 6 vehicle. 2. Environmental Information On-board List: The Environmental Information On-board List details the vehicle's environmental impact, including its tailpipe emission standard. It directly and clearly indicates the emission stage of the vehicle—whether it is China 5 or China 6. By reviewing this list, you can accurately determine the vehicle's tailpipe emission stage. 3. Vehicle Qualification Certificate: The vehicle's relevant qualification certificate will explicitly state the vehicle's emission standard.

1

0

Share

What Causes Intermittent Power Loss in a Haval H6 While Driving?

It may be due to issues with the car's engine, or problems with the fuel supply system and ignition system affecting performance. Engine power reduction could also be caused by carbon buildup in the engine. Carbon deposits in the engine can include various types, such as cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, and intake carbon deposits, all of which can impact engine power. Below are detailed explanations: 1. When there is excessive carbon buildup inside the engine, the car's ignition system may become misaligned, the engine's air intake efficiency decreases, ultimately leading to a reduction in engine power. The car may exhibit symptoms like weak idling, and in severe cases, it may even shake. 2. Fuel system malfunctions can occur if the car is filled with low-quality gasoline, leading to a decrease in engine power. If the car's fuel requirement is 95 octane, then 95 octane gasoline must be used, as this is the minimum fuel standard for the car. Another possible cause is a blocked fuel tank vent, which can restrict fuel supply, resulting in an overly lean air-fuel mixture in the engine and reduced engine efficiency. 3. Insufficient engine oil or insufficient engine coolant can increase the engine's load, impairing its cooling efficiency, not only reducing engine power but also increasing the car's fuel consumption.

7

4

Share

Does adding 92 octane gasoline once affect the Audi A6?

Audi A6 adding 92 octane gasoline once has some impact, but the impact is not significant. The details are as follows: 1. The biggest difference between 92 and 95 octane gasoline lies in the 3% n-heptane content. Standard gasoline is composed of n-heptane and isooctane, but since n-heptane has relatively poor anti-knock properties, the amount of n-heptane determines the type of engine it is suitable for. 2. If the wrong gasoline is added, the driving experience may include abnormal vibrations in the engine and even noise. Additionally, since the ignition timing of the engine does not change after a sudden change in fuel quality, it may lead to incomplete combustion or insufficient combustion. Therefore, during driving, especially during aggressive driving, the car may feel underpowered. 3. Some cars that usually use higher-octane gasoline may trigger an engine warning light if they suddenly use lower-octane gasoline once. This means a yellow engine icon may appear on the dashboard while driving. Generally, this icon will disappear on its own after refueling with 95 octane gasoline and driving for a while. 4. After running out this tank of gasoline, simply refill with 95 octane and continue using it. The manufacturing technology of car engines is already very mature, and engines are designed and manufactured with these possible minor mistakes in mind, incorporating such fault-tolerant mechanisms.

6

5

Share

What is the height of a Level 2 flooded vehicle?

Level 2 flooded vehicle refers to the situation where the water level reaches half of the wheels. The following are the components that need to be replaced for a Level 2 flooded vehicle: Replacing engine oil and oil filter: If the vehicle did not stall or was not started after being flooded, it is necessary to replace the engine oil, oil filter, air filter, and the sealing rings during the drainage process of engine components. If the vehicle stalled or was restarted, in addition to the above-mentioned components, the engine connecting rods may also need to be replaced depending on the situation, requiring an engine overhaul. Replacing transmission oil and filter: The transmission fluid and transmission oil filter need to be replaced. Replacing all vehicle fluids: All vehicle fluids, including engine oil, coolant, power steering fluid, brake fluid, etc., should be completely replaced if the flooding is severe. Replacing bearing components: If the water level reaches the engine hood and the flooding duration is relatively long, it is recommended to replace components with bearings to avoid future issues such as noise and damage due to rust. Examples include the generator, air conditioning compressor, and four-wheel vehicle bearings. Replacing electrical circuits: Depending on the extent of water ingress, damaged electrical components and wiring need to be replaced.

11

5

Share

What is the installation method for the front wheel bearing of a Focus?

The installation method for the front wheel bearing of a Focus is as follows: 1. Use triangular wood blocks to secure the vehicle (rear wheels), then remove the decorative cover and dust cover of the hub axle head. 2. Loosen the tire nuts, use a jack to lift the vehicle, being careful not to damage the threads of the tire bolts. If it is a disc brake, remove the brake, then use pliers to remove the locking ring or pin. 3. Use a special tool to remove the hub. 4. Scrape off the old grease from the bearing, journal, and hub cavity, clean the hub bearing and journal with a cleaning agent, and wipe them dry with a cloth. Finally, wipe the hub cavity clean with a cloth. 5. Inspect the hub bearing and bearing seat ring. If cracks, fatigue spalling, or loose bearing rollers are found, replace the bearing. If pitting is found on the bearing seat ring, also replace the bearing. 6. Check the fit between the bearing inner diameter and the journal. The clearance should not exceed 0.10mm. When measuring the journal, measure at the upper and lower parts perpendicular to the ground (where the most wear occurs). If the clearance exceeds the specified limit, replace the bearing to restore normal clearance. Do not reduce the clearance by creating burrs or pitting on the journal. 7. When applying grease to the bearing cavity, ensure that the grease is squeezed into the bearing until it emerges from the other side. Apply a thin layer of grease to the hub cavity and axle head cover to prevent rust. Be careful not to apply too much grease in the hub cavity, as it may affect heat dissipation and braking. 8. Reinstall the hub and outer bearing onto the journal. Hand-tighten the axle head adjusting nut, then use an axle head wrench to tighten the adjusting nut to the specified torque. After tightening the nut, rotate the hub a few times to check the bearing installation. Additionally, ensure proper seating of the bearing and seat ring through rotation. At this point, the bearing tightness should be appropriate, allowing the wheel to rotate freely without noticeable axial play. 9. Finally, reinstall the locking plate, fixing nut, tire, dust cover, and decorative cover in sequence. 10. After adjusting the hub bearing, drive a short distance (about 10km), then stop and check. Feel the hub temperature with your hand. If it is hot, the bearing is too tight and should be readjusted to reduce tightness appropriately.

10

2

Share

How Many Days After Passing Subject 3 Can You Take Subject 4?

After passing Subject 3, the timing for taking Subject 4 can be divided into three scenarios: taking it directly on the same afternoon; within 9 days without an appointment, where you can go to the Subject 4 test site with your ID within 9 days of passing Subject 3; and third, scheduling after 10 days, where the success of the appointment depends on the current number of test-takers, student priority, and temporary arrangements at the test center. Subject 4, also known as the Subject 4 theory test or driver theory test, is part of the motor vehicle driver's license examination. It includes requirements for safe and civilized driving operations, knowledge of safe driving under adverse weather and complex road conditions, emergency handling methods for situations like tire blowouts, and post-accident handling knowledge. Subject 4 Exam Notes: Exam Duration: The exam lasts 45 minutes, and making 12 mistakes (6 questions) during the test will terminate the session. Number of Questions: Depending on the type of license being tested, 50 questions are randomly selected from the Subject 4 question bank, with each question worth 2 points. Question Types: The exam includes single-choice questions (including true/false questions) and multiple-choice questions, covering animated questions, image-based questions, scenario recognition questions, and text-based questions. Retake Notes: If you fail Subject 4, you only need to retake Subject 4. The driving school will schedule the retake, with no limit on the number of retakes. You can retake it until you pass, and no retake fees are required for Subject 4. Subject 4 Exam Tips: Strengthen weak areas and identify the reasons for mistakes. For marked questions, don't just memorize the correct answers. Instead, refer to regulations, textbooks, or reference materials to understand and internalize the reasons behind the errors. Categorize and summarize questions. Use the question bank's analysis for classification and find similar questions. Many questions in the bank are similar and easily confused, so they should be analyzed together. For example, traffic signs like "Pedestrian," "Walking," "Watch for Pedestrians," "Crosswalk," and "Watch for Crosswalk" have similar patterns and can be confusing. Grouping them during study helps avoid mistakes. Find memory techniques. Many questions in the bank involve numbers, which can be summarized for easier memorization. The driving test consists of three main subjects: Subject 1, Subject 2, and Subject 3, with Subject 3 divided into two parts. Subject 4 is the colloquial name for the Subject 3 Safe and Civilized Driving Knowledge Test and is not a separate subject. Subject 1 refers to the examination on road traffic safety laws, regulations, and related knowledge; Subject 2 refers to the field driving skills test; and Subject 3 refers to the road driving skills and safe and civilized driving knowledge test. The safe and civilized driving knowledge test is conducted after Subject 3.

18

3

Share

What to Do When Water Enters the Car Exhaust Pipe?

What is the National Vehicle Emission Standard?

What Causes Intermittent Power Loss in a Haval H6 While Driving?

Does adding 92 octane gasoline once affect the Audi A6?

What is the height of a Level 2 flooded vehicle?

What is the installation method for the front wheel bearing of a Focus?

How Many Days After Passing Subject 3 Can You Take Subject 4?

Is the Golf a B-segment car?

What does 740 mean?

What is the new energy vehicle scrapping policy?

What do the M+ and M- on an automatic transmission shifter represent?