What to Do When a Car Tire Loses Air

What is the best formula for antifreeze?

The antifreeze formula is a mixture of ethylene glycol + distilled water + additives (malonic acid, anti-corrosion and scale inhibitor, and triethanolamine), which constitutes the commonly used ethylene glycol water-based antifreeze. It prevents freezing in winter, boiling in summer, and can be used year-round while also offering anti-corrosion and anti-scale properties. More details are as follows: 1. During cold winter parking, it prevents the coolant from freezing and cracking the radiator or damaging the engine cylinder block or head. In the high temperatures of summer, it effectively prevents boiling, avoiding overheating issues. Automotive antifreeze plays a significant role, directly impacting the vehicle's performance and lifespan. Many people believe antifreeze is only used in winter, but in fact, it should be used throughout the year. 2. Antifreeze also has anti-corrosion properties. Since the engine's cooling system includes several metals such as steel, aluminum alloy, cast iron, copper, and solder used in radiator welding, the cylinder block and head are generally made of cast aluminum or cast iron, and the radiator is primarily made of copper and brass. Antifreeze must protect all these metals during long-term contact. Using deionized water and appropriate additives can prevent various types of corrosion.

2

0

Share

What are the dimensions of the Q5L?

The dimensions of the all-new Audi Q5L are 4765×1893×1659mm. Below are specific details about the Audi Q5L: 1. In terms of exterior design, the front features sharp angles and a hexagonal grille, resembling the family Q7, with the overall style transitioning from the rounded curves of the older Q5 to a more aggressive look. After the extension, the body length and wheelbase have been improved compared to the older Q5. 2. For the interior, there are a total of 11 color combinations and 7 trim options: Quartz paint rock gray trim, rose red paint trim, natural brown matte wax wood trim, natural gray matte oak trim, diagonal silver aluminum trim, brushed aluminum matte trim, and black piano paint trim. Inside, there are two premium genuine leather seat options: Milano leather and premium Nappa leather, offering a total of 13 seat color combinations. 3. In terms of powertrain, the Audi Q5L retains the 2.0T gasoline engine from the overseas model, with a maximum output of 252 horsepower. The transmission system is paired with a 7-speed dual-clutch gearbox and comes standard with the quattro all-wheel-drive system.

6

3

Share

What should be paid attention to when driving a new car on the road?

About the precautions for novice drivers on the road are as follows: 1. Pay attention to braking skills: Don't panic when encountering braking. When judging that braking is about to occur, slowly and continuously press the brake pedal to evenly reduce the speed. When the vehicle is about to stop, gradually release the brake pedal until the vehicle stabilizes. Sudden braking can cause significant wear and tear on the wheels and brake pads, which is not good for the vehicle. 2. Pay attention to the lights, do not turn on the high beams randomly: Do not use high beams when following another vehicle, do not use high beams in urban areas, and turn off high beams when facing oncoming traffic to avoid accidents. 3. Precautions for novices when driving through curves: When driving through a curve, slow down before entering the curve, place your right foot on the brake pedal to alert the vehicles behind you. After entering the curve, continue to keep your right foot on the brake pedal, remember to hold the steering wheel steadily. After passing halfway through the curve, start accelerating when you see the straight road. Avoid driving too fast in curves, as poor control can easily lead to accidents. 4. Driving on the road is not the slower the better, drive at an appropriate speed: Under conditions that allow, drive close to the speed limit, keeping up with the overall flow of traffic, ensuring driving efficiency while also ensuring safety.

14

5

Share

How to Test Car Air Conditioning Pressure?

You can use a pressure gauge to check faults in the car air conditioning refrigeration system, which generally involves two states: compressor stopped and compressor running. After the compressor has been stopped for more than 10 hours, the high and low pressures of the compressor should be the same value. If the displayed high and low pressures are not equal, it indicates a blockage inside the system, and the expansion valve, liquid storage bottle, and pipeline parts should be inspected. When the compressor is running, control the engine speed at 1500-2000 rpm, start the air conditioning to make the compressor work. Generally, the low-side pressure is about 150-250 kPa, and the high-side pressure is about 1400-1600 kPa. If the pressure indication does not match the normal value, you can perform fault diagnosis as follows: 1. Both the high and low-pressure gauges indicate values lower than normal. This may be due to insufficient refrigerant. During inspection, you may find the high-pressure pipe slightly warm and the low-pressure pipe slightly cold, but the temperature difference is not significant. Bubbles can be observed in the sight glass every 1-2 seconds. At this time, check for any leakage points, repair the leak, and then replenish the refrigerant. 2. The low-pressure gauge indicates a value much lower than normal. In this case, a blurry mist flow can be seen in the sight glass, there is no temperature difference between high and low pressures, and the air conditioning is not cold, indicating a severe refrigerant leak.

15

2

Share

Should the Left Turn Signal Always Be Used When Making a U-Turn?

Yes, the left turn signal should be activated. According to the "Road Traffic Safety Law," failure to use the turn signal during a U-turn will result in a penalty of 1 point and a fine of 100 RMB. Other violations that incur a 1-point penalty include: not using lights as required; not yielding properly during encounters; exceeding specified dimensions for vehicle cargo length, width, or height; and driving a motor vehicle without displaying the inspection compliance mark, insurance mark, or carrying the vehicle registration certificate or driver's license. Article 57 of the Implementation Regulations of the Road Traffic Safety Law of the People's Republic of China stipulates the following rules for using turn signals: When turning left, changing lanes to the left, preparing to overtake, leaving a parking spot, or making a U-turn, the left turn signal must be activated in advance. When turning right, changing lanes to the right, returning to the original lane after overtaking, or parking by the roadside, the right turn signal must be activated in advance. Turn signals: Must be turned on when the vehicle is changing direction, flashing intermittently to alert surrounding vehicles and pedestrians. The timing of activating the turn signal is crucial—it should be turned on approximately 30 to 100 meters before reaching the turning point. Permissible U-turn scenarios: Intersections with U-turn signs: If there is a clear U-turn sign at an intersection, a U-turn is allowed. If there is a U-turn traffic light, follow its instructions. In the absence of a traffic light, proceed with the U-turn only if it does not obstruct other vehicles or pedestrians. Intersections without explicit "No U-Turn" or "No Left Turn" signs: U-turns are permitted unless explicitly prohibited. "No explicit prohibition" means the absence of "No U-Turn" or "No Left Turn" signs, and the absence of solid center lines. Yellow grid lines also permit U-turns: Yellow grid lines are no-parking zones marked at intersections prone to congestion due to temporary stops, important facility entrances, and other designated areas. Stopping on these lines (including waiting for traffic lights) is a violation. Although parking is prohibited in yellow grid zones, U-turns are allowed unless there is a central divider. Intersections with U-turn traffic lights: If a U-turn traffic light is present, follow its signal—only proceed on green. When "No Left Turn" and "U-Turn Permitted" signs coexist: U-turns are allowed, but left turns are prohibited. Note that "No U-Turn" does not equate to "No Left Turn." Precautions when making a U-turn: Observe road markings—if solid lines are present, U-turns are prohibited under any circumstances. Continue driving to find a suitable U-turn location. If a "No Left Turn" sign is posted, U-turns are also prohibited at that intersection, even if "No U-Turn" is not explicitly stated, as U-turns inherently involve a left turn. U-turns must be made from the innermost left-turn lane. If in the second left-turn lane, U-turns are not permitted at that intersection. Always yield to oncoming traffic before making a U-turn. Failure to do so will result in full liability for any accidents. Near intersection stop lines, lanes often have guiding arrows. The leftmost lane is not always for left turns—if marked with a straight arrow, U-turns are prohibited even without explicit "No U-Turn" signs.

8

3

Share

What Causes the Engine Warning Light to Illuminate in a Honda Fit?

Sensor malfunctions, car maintenance issues, fuel quality problems, poor combustion of the air-fuel mixture, engine intake issues, turbocharging problems, exhaust system faults, and anti-theft system failures are the primary reasons for the engine warning light to illuminate. Additionally, during vehicle startup, the car performs a self-check on the engine system. Normally, the engine warning light should turn off after the self-check is completed. If it remains on for an extended period, it is advisable to promptly visit a repair station for professional assistance to diagnose and eliminate potential safety hazards. Below is a detailed explanation of each type of fault: Sensor Issues: Sensors include those for coolant temperature, crankshaft position, air flow, intake temperature, and oxygen sensors. When these sensors are damaged, have poor connections, or experience signal interruptions, the car's ECU cannot accurately obtain engine data, triggering the engine warning light. In such cases, it is essential to seek professional inspection at a repair center to address the issue promptly. Maintenance Issues: Poor engine maintenance is the most common cause of the engine warning light illuminating. Vehicles have specific maintenance schedules, and failure to adhere to them, combined with poor driving habits, can increase the engine's operational burden, eventually causing the engine warning light to alert the owner of a fault. Fuel Quality Issues: This refers to both fuel and engine oil. The fuel used in cars typically has a specific octane rating, while engine oil can be semi-synthetic or fully synthetic. Manufacturers usually recommend the appropriate fuel octane and oil type. If the owner fails to follow these recommendations, prolonged use can lead to engine wear, triggering the warning light. Always use the recommended fuel octane and engine oil grade for your vehicle. Poor Combustion of Air-Fuel Mixture: Faulty spark plugs, ignition coils, fuel pumps, or clogged fuel lines can cause poor combustion of the air-fuel mixture. This leads to engine carbon buildup or knocking, which the oxygen sensor detects and reports to the ECU, resulting in the warning light illuminating as a warning. Intake Issues: The engine requires air for combustion, making the air filter crucial. A dirty or uncleaned air filter can restrict airflow, potentially causing blockages over time. Severe cases may trigger the engine warning light. Turbocharging Issues: Problems with the intake turbocharging system or turbocharger can also cause the engine warning light to illuminate. The most common issue is turbocharger damage, often accompanied by symptoms like oil leaks, excessive oil consumption, reduced power, metallic noises, or blue/black smoke from the exhaust. Exhaust System Issues: Faults in the rear oxygen sensor, catalytic converter, exhaust camshaft, or bearings can trigger the warning light. The catalytic converter is particularly prone to failure due to factors like leaded gasoline, lead or silicon-based oil additives, physical damage, or fuel system issues. Anti-Theft System: If the car's electronic anti-theft system malfunctions or the anti-theft controller is incompatible with the engine ECU, the engine may fail to operate correctly, and the warning light may illuminate. Solutions for Engine Warning Light Illumination: If the engine warning light is on and the car won't start, this may be due to a faulty fuel pump or ignition component. In such cases, it is recommended to call for assistance immediately. If the engine warning light is on but the car is drivable, yet exhibits severe shaking or loss of power, pull over safely and call for roadside assistance. If the engine warning light is on but no driving abnormalities are observed, it may indicate a sensor fault. In this scenario, you can continue driving cautiously at low to moderate speeds but should visit a repair shop as soon as possible to address the issue.

8

5

Share

What to Do When a Car Tire Loses Air

What is the best formula for antifreeze?

What are the dimensions of the Q5L?

What should be paid attention to when driving a new car on the road?

How to Test Car Air Conditioning Pressure?

Should the Left Turn Signal Always Be Used When Making a U-Turn?

What Causes the Engine Warning Light to Illuminate in a Honda Fit?

Can the Buick Excelle use 5W30 engine oil?

Can transmission fluid be changed outside of a 4S shop?

What are the engine displacements of the Bentley Continental?

What Causes the Abnormal Noise When a Car Goes Over Speed Bumps?