What car does the blue sky and white clouds describe?

How Often Should the Oil in a Gasoline Generator Be Changed?

Generally, the oil change interval is 250 hours or one month. When using Class 2 oil, the oil can be extended to 400 hours of operation before needing a change, but the oil filter (filter element) must be replaced. Here is some information about engine oil: 1. Introduction to Engine Oil: Engine oil, also known as engine lubricant, with the English name: Engine oil. It has a density of approximately 0.91×10 (kg/m³) and serves to lubricate and reduce friction, 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 the car. 2. Composition of Engine Oil: Engine oil consists of two parts: base oil and additives. The base oil is the main component of the lubricant, determining its basic properties, while additives compensate for and improve the deficiencies of the base oil, imparting certain new characteristics, making them an essential part of the lubricant.

20

1

Share

What is the normal discharge current for a car?

The normal range for car leakage current is below 40mA for ordinary cars and below 80mA for high-end cars. Here are the methods for car discharge maintenance: 1. First, use a battery tester to check if the battery is aged. If the test is normal and the battery discharge is caused by human factors, simply charging the battery will suffice. 2. If the vehicle operates normally but the battery is depleted after a few days of inactivity, first check if there is any direct short circuit between the battery terminals caused by accidental connections, then check if all electrical appliances that bypass the ignition switch are functioning properly. 3. Connect a fault diagnostic tool, turn on the ignition switch, and read the fault codes. If there are fault codes, inspect according to the prompts. 4. If there are no fault codes, turn off all electrical appliances and lock the car for a period of time, then use a current clamp or connect a multimeter in series with the negative terminal circuit of the battery to measure the dormant current.

9

5

Share

What are the causes of intake flow system performance failure?

The causes of intake flow system performance failure: 1. Inaccurate resistance value of the potentiometer wiper, poor contact between the potentiometer sliding arm and carbon film resistor, insufficient tension of the return spring, poor contact of the fuel pump switch point. 2. Incorrect frequency signal transmission due to electronic component circuit failure. 3. Contamination of hot wire or hot film, damage to hot wire or hot film, poor performance of thermistor. 4. Air leakage in the intake system or damage to the air flow meter, requiring inspection of the pipeline between the air meter and throttle valve for air leakage. Additional information: 1. Common causes of air flow meter failure: short circuit, open circuit, or abnormal air intake signal, all of which can lead to abnormal fuel injection, causing the mixture to be too rich or too lean, resulting in poor engine operation or reduced power. 2. Damage to the air flow sensor: generally caused by excessively dirty intake air, leading to dust accumulation that affects its detection accuracy and lifespan.

10

4

Share

What are the differences between aluminum and steel used in automobiles?

Here are the differences between aluminum and steel used in automobiles: 1. Different weights: The most intuitive difference between aluminum and steel is the significant difference in density. If you hold them in your hand, the heavier one is steel, and the lighter one is aluminum. 2. Different surfaces: Aluminum does not rust in the air but only undergoes natural oxidation, appearing silver-white or dark gray. The natural surface of steel appears dull or rusty. 3. Different hardness: Steel is very hard, harder than most objects in nature. In contrast, aluminum is much less hard than steel. If you scratch them against each other, the harder one is steel. 4. Different magnetism: Ordinary steel objects are attracted to magnets, while aluminum has almost no magnetism. 5. Different resistivity: When measuring the resistivity of the two materials with a multimeter, aluminum has the lowest resistivity among various metal materials, and its conductivity is higher than that of steel.

20

2

Share

What to Do When the Car Headlight Cover Turns Yellow?

You can use specialized polishing wax to grind and polish the yellowed headlight cover. Minor yellowing and patterns can be removed. However, if the yellowing is very severe, you will need to go to a 4S shop or repair shop for replacement. Below are the specific steps for grinding and polishing the headlight cover: 1. Wash with soapy water. Soapy water is alkaline and will not corrode the headlight cover. 2. Soak sandpaper of different grits in cold water for 10 minutes, then evenly wipe the headlight housing, grinding back and forth in one direction. Keep the surface moist and apply moderate pressure to avoid damaging the surrounding paint or decorative strips. Continue until pits or scratches are smoothed out. Wipe gently with a towel and check if the grinding is even. Once done, dry the surface. 3. Use sandpaper dipped in water to lightly grind away the aged layer of the headlight cover. Then, apply a layer of polishing agent and finally spray a layer of clear oil for protection. 4. Some car headlights come with a built-in UV protection coating, which may be damaged during grinding. Use UV sealant to prevent further UV damage to the plastic.

9

0

Share

What Causes Ice Formation in the Car's Evaporator Box?

There are several reasons for ice formation in the car's air conditioning evaporator box: 1. The expansion valve's adjustment is too small, resulting in excessively low low-pressure. 2. Insufficient refrigerant in the system leads to excessively low evaporation pressure. 3. The internal circulation filter is clogged. 4. The temperature control (or temperature sensor) malfunctions, causing the compressor to run continuously. 5. The variable displacement compressor's energy control valve (pressure regulating valve) fails, keeping the compressor operating at full capacity, which results in excessively low low-pressure and causes the evaporator to freeze. Below are solutions for ice formation in the car's air conditioning evaporator box: 1. Check if the temperature control sensor is in the correct position. 2. Adjust the temperature control to a lower setting; if it cannot be adjusted, replace the temperature control. 3. Inspect the air conditioning computer control for any faults. 4. Apart from the compressor running continuously, check if the evaporator box fan's inlet and outlet dampers are blocked.

10

3

Share

What car does the blue sky and white clouds describe?

How Often Should the Oil in a Gasoline Generator Be Changed?

What is the normal discharge current for a car?

What are the causes of intake flow system performance failure?

What are the differences between aluminum and steel used in automobiles?

What to Do When the Car Headlight Cover Turns Yellow?

What Causes Ice Formation in the Car's Evaporator Box?

Is it okay for a motorcycle to get rained on?

What Are the Reasons for Sudden Loss of Power Steering Assistance?

Why does the car shake when in D gear with the brake pressed?

What does IAC mean in a car?