How to Step on the Brake in Subject 3?

Is Engine Cleaning and Maintenance Necessary?

For new vehicles or those with low mileage, engine cleaning and maintenance are unnecessary. However, for vehicles that have not undergone engine cleaning for an extended period, it is advisable to perform such maintenance. Prolonged neglect of engine cleaning can impair the engine's heat dissipation capacity, increase oil flow resistance, clog oil passages, and ultimately reduce engine power. Here are the benefits of engine cleaning: Cleaning Oil Passage Sludge: The engine block contains numerous oil passages. Engine cleaning agents can effectively remove sludge and impurities from these passages, ensuring the proper functioning of the engine's lubrication system. Cleaning Piston Ring Carbon Deposits: When an engine cleaning agent is added to the engine oil, it circulates along with the oil on the cylinder walls, cleaning residual carbon deposits from the piston rings and ring grooves. Engine Maintenance: Removing sludge, carbon deposits, and other substances that affect normal engine operation can improve engine performance and extend its service life. The primary purpose of engine cleaning and maintenance is to eliminate sludge inside the engine and add oil protectants to prolong the lifespan of engine components.

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What are the causes of engine abnormal noise?

Causes of abnormal engine noise in automobiles include aging or loosening of engine mounts, piston slap, misfire-induced noise, and excessive carbon buildup in the throttle body or fuel injectors. Below are detailed explanations and corresponding solutions: Aging or loosening of engine mounts: Engine mounts, also known as engine cushions or brackets, are typically installed between the engine and the vehicle body, connecting the two and securing the engine in place. Their most important function is to provide vibration damping and shock absorption. Once the engine mounts age or become loose, engine vibrations will produce abnormal noises, necessitating replacement of the mounts. Piston slap: This occurs when the piston tilts and the direction of lateral pressure changes, causing the contact surface between the piston and cylinder to shift from the secondary thrust side to the primary thrust side, resulting in lateral oscillation. Consequently, the engine periodically produces a knocking sound as the piston strikes the cylinder wall. Replacing the engine oil can resolve this issue. Excessive carbon buildup in the throttle body or fuel injectors: If carbon deposits in the engine are severe, leading to symptoms such as rough idling, increased fuel consumption, and reduced power, the engine may produce abnormal noises. Cleaning the engine carbon deposits, servicing the throttle body, and replacing the gaskets and spark plugs can address this problem. Misfire-induced noise: Engine misfire primarily refers to one or more cylinders not functioning properly, typically characterized by noticeable gaps in the exhaust gas flow, severe shaking of the exhaust pipe, and distinct "popping" or thumping sounds from the engine. This phenomenon is often related to faulty ignition coils, so inspecting and repairing the ignition coils is necessary.

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What is the displacement of a 1.5T engine?

A 1.5T engine is equivalent to a naturally aspirated displacement of 2.0L to 2.4L. The displacement of a car is indicated by 'L', which stands for volume and exhaust capacity. 1.5T refers to adding a turbocharger to a 1.5L naturally aspirated engine, with performance comparable to a 1.8L engine and fuel consumption similar to a 1.6L engine. The biggest advantage of turbocharging is that it can significantly increase engine power and torque without increasing engine displacement, with a typical increase rate of around 30%. A turbocharged engine is one that relies on a turbocharger to increase air intake. Essentially, it is an air compressor. When the engine speed increases, the exhaust velocity and turbo speed also accelerate, increasing the degree of air compression and consequently the engine's air intake. This allows for an increase in the engine's output power. When a turbocharger is installed, the engine's maximum output power can be increased by about 40% or even more compared to when it is not equipped with one.

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What Does It Mean When the Engine Light Is On?

When the engine light is on, it means the engine malfunction indicator light is illuminated. This light indicates that there is a fault in the engine. The reasons for the engine light being on include poor fuel quality, oxygen sensor failure, and spark plug carbon buildup. Below are detailed explanations: Poor Fuel Quality: If low-quality fuel is added at a gas station, it can cause incomplete combustion of the air-fuel mixture during engine operation, triggering the engine malfunction light. Oxygen Sensor Failure: A damaged oxygen sensor or a loose/damaged sensor connector can lead to an overly lean or rich air-fuel mixture, which will cause the malfunction light to illuminate. Spark Plug Carbon Buildup: Carbon buildup on spark plugs can result in poor engine performance, including difficulties in starting, unstable idling, poor acceleration, backfiring during sudden acceleration, excessive exhaust emissions, and increased fuel consumption. Methods to Resolve the Engine Malfunction Light: Check whether the front and rear oxygen sensor connectors are loose and replace any damaged oxygen sensors; refill with high-quality fuel; perform a fuel system cleaning and dry ice cleaning of the engine cylinders.

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What Does the Yellow Engine Light Mean?

Engine yellow light indicates intermittent engine faults, meaning the engine control system has detected misalignment in engine operation or sensor signals. Reasons for the yellow engine dashboard light include sensor issues, maintenance problems, and oil quality. Below are detailed explanations: Sensor Issues: Sensors include those for coolant temperature, crankshaft position, air flow, intake temperature, oxygen sensors, etc. When these sensors are damaged, have poor contact, or experience signal interruptions, the vehicle's ECU cannot accurately obtain engine data, leading to the engine fault light turning on. In this case, sensor inspection and repair are required. Maintenance Problems: Poor engine maintenance is the most common cause of engine faults. In this case, maintenance is necessary. Oil Quality Issues: Oil quality includes fuel and engine oil. The fuel added to the car usually has a label, and engine oil can be categorized as semi-synthetic or fully synthetic. Manufacturers generally recommend which grade of fuel and type of engine oil should be used. Failure to follow these recommendations over time can cause engine wear and trigger the fault light. In this case, it is necessary to replace the oil and fuel as recommended by the manufacturer.

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What is the flash point of engine oil?

The flash point of engine oil is generally around 200 degrees Celsius. Under vacuum conditions, the boiling point of engine oil reaches 850 degrees Celsius. The boiling and flash points of engine oil usually vary depending on the specific type of oil, which is typically indicated on the bottle. It's important to pay attention to these specifications during use. Precautions for using automotive engine oil: Choose high-quality oil whenever possible: Selecting premium engine oil can enhance vehicle performance and provide better lubrication. Full synthetic oils, in particular, not only protect the engine and reduce oil change frequency but also save on oil expenses. It's advisable to choose different oil viscosities according to seasons: opt for relatively thicker oils in summer and more fluid oils in winter. Understand the replacement cycle: The oil change interval isn't fixed and should be determined based on the owner's driving environment and habits. Generally, full synthetic oil should be replaced every 10,000 kilometers, but harsh driving conditions may require more frequent changes. Oil level should be slightly below the dipstick mark: When adding oil, control the quantity carefully. Excessive oil increases crankshaft rotation resistance, reduces engine output power, and may lead to oil burning. Therefore, maintaining the oil level slightly below the dipstick mark is recommended.

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How to Step on the Brake in Subject 3?

Is Engine Cleaning and Maintenance Necessary?

What are the causes of engine abnormal noise?

What is the displacement of a 1.5T engine?

What Does It Mean When the Engine Light Is On?

What Does the Yellow Engine Light Mean?

What is the flash point of engine oil?

What is the Purpose of Engine Deep Cleaning?

Why can't the dash cam recognize the memory card?

Does the Engine Start-Stop Technology Harm the Car?

Can the Engine Start-Stop Be Turned Off?