Why is the power of a new car weakening?

Why is the Low-Pressure Pipe of a Car Air Conditioner Hot to the Touch?

Causes for the low-pressure pipe of a car air conditioner being hot to the touch include compressor or expansion valve failure, evaporator blockage, insufficient refrigerant flow, or excessive pipeline pressure, as well as excessive fouling in the condenser copper tubes. Under normal circumstances, the low-pressure pipe of a car air conditioner should be cool, while the high-pressure pipe should be hot. If the low-pressure pipe becomes hot, the air conditioning cooling effect will be poor. Below is additional information: 1. Compressor or expansion valve failure: This can cause the low-pressure pipe of a car air conditioner to become hot. The air conditioner compressor plays a role in compressing and driving the refrigerant in the air conditioning refrigerant circuit. The air conditioner compressor extracts the refrigerant from the low-pressure area, compresses it, and sends it to the high-pressure area for cooling and condensation. The heat is dissipated into the air through the radiator, and the refrigerant changes from a gaseous state to a liquid state, with an increase in pressure. 2. Checking the refrigerant: If the expansion valve is blocked and the air conditioner is not working, check whether the refrigerant is sufficient. If it is insufficient, the system needs to be vacuumed before adding refrigerant, and then use a pressure gauge to check whether the pressure in the high and low-pressure pipelines is normal. 3. Identifying the high and low-pressure pipes of a car air conditioner: The thin one is the high-pressure intake pipe, and the thick one is the low-pressure pipe. You can also distinguish them by the letters next to the compressor connection. Some compressors are mostly marked with S or D to distinguish them, where S is the low-pressure connection and D is the high-pressure connection.

5

0

Share

What are the methods for choosing automotive explosion-proof film?

Automotive explosion-proof film should be selected based on the following methods: choose a film with good light transmission that does not obstruct visibility. The functions of explosion-proof film include: 1. Heat insulation and cooling: It can reduce the overheating phenomenon inside the car caused by sunlight exposure, keeping the interior cool while also reducing air conditioning consumption; 2. UV protection: While ultraviolet radiation has sterilizing effects, it can also harm human skin. Explosion-proof film effectively blocks UV rays, protecting passengers' skin; 3. Preventing glass cracking and interior fading: Besides harming the owner's skin, prolonged direct sunlight can cause the car's interior to crack and fade. Explosion-proof film also helps maintain the car's interior and prolong its service life.

1

2

Share

What is the difference between tire pressure monitoring and tire pressure warning?

The difference between tire pressure monitoring and tire pressure warning lies in their detection methods: tire pressure monitoring employs active detection, while tire pressure warning utilizes passive detection. The hazards of excessive tire pressure include: 1. Reduced tire friction and adhesion, affecting braking performance and tire lifespan; 2. Decreased puncture resistance, increasing the risk of tire blowouts; 3. Accelerated wear on the central tread pattern, shortening tire life, increasing vehicle vibration, and impacting other component longevity; 4. Overextension of tire cords leading to reduced elasticity, increasing driving load and decreasing puncture resistance; 5. Increased susceptibility to punctures from road debris like nails or glass, potentially causing internal cracks, bursts, and blowouts.

10

4

Share

What is the method to check the transmission oil level in a Volkswagen CC?

To check the transmission oil level in a Volkswagen CC, follow these steps: 1. Preheat the oil to approximately 50 degrees Celsius. 2. Shift the gear lever through each position, pausing for a few seconds in each gear, then check the oil level using the dipstick located on top of the transmission. The functions of transmission oil are: 1. To keep the shifting system clean; 2. To lubricate the transmission components. Taking the 2021 Volkswagen CC as an example, it is a mid-size sedan with the following dimensions: length 4865mm, width 1870mm, height 1459mm, wheelbase 2841mm, fuel tank capacity 66 liters, trunk capacity 501 liters, and curb weight 1640kg.

1

3

Share

How often should the power steering fluid be changed in a Lavida?

The power steering fluid in a Lavida should be changed every 2 years or 40,000 kilometers. Taking the 2021 Lavida as an example, it is a compact car with the following dimensions: length 4670mm, width 1806mm, height 1474mm, wheelbase 2688mm, and minimum ground clearance of 190mm. The 2021 Lavida features a MacPherson strut front suspension and a torsion beam rear suspension. It is equipped with a 1.4T turbocharged engine producing a maximum horsepower of 150PS, maximum torque of 250Nm, and maximum power of 110kW, paired with a 7-speed dual-clutch transmission.

9

0

Share

What Causes the Rattling Noise When a Camry Drives on Bumpy Roads?

The rattling noise when a Camry drives on bumpy roads can be caused by various reasons. Here are the detailed explanations: 1. Insufficient Body Rigidity: Rattling noises in the body often occur due to insufficient body rigidity, which causes the vehicle to deform during driving, leading to friction or shaking between doors and door frames, or even friction between steel plates due to welding failures. This is primarily a quality and manufacturing issue, with no fundamental solution. However, some rattling noises may result from loose body components, which can be fixed by tightening screws or replacing adhesive strips. Applying adhesive strips on windows or placing rubber pads in friction-prone areas might reduce or eliminate the noise, but these are temporary fixes. 2. Engine Vibration: Some engine noises are normal, but certain unusual sounds may indicate potential faults. For example, a high-pitched belt squeal is usually caused by belt slippage; sharp metal friction sounds during engine operation may stem from damaged bearings in the generator, water pump, or power steering pump, or from loose fasteners. A hissing sound could indicate an exhaust system blockage, vacuum tube leak, or breakage. Heavy metallic knocking sounds suggest engine knocking, often caused by excessive ignition advance angle, excessive carbon buildup in the combustion chamber, low spark plug heat range, or the use of low-quality gasoline. 3. Tire Noise: If you hear a "tapping" sound while driving, it might be due to a stone stuck in the tread or a punctured tire. A dull "rumbling" sound accompanied by tire and body shaking indicates uneven tire wear, requiring tire replacement. Overinflated tires can also cause excessive tire noise.

20

0

Share

Why is the power of a new car weakening?

Why is the Low-Pressure Pipe of a Car Air Conditioner Hot to the Touch?

What are the methods for choosing automotive explosion-proof film?

What is the difference between tire pressure monitoring and tire pressure warning?

What is the method to check the transmission oil level in a Volkswagen CC?

How often should the power steering fluid be changed in a Lavida?

What Causes the Rattling Noise When a Camry Drives on Bumpy Roads?

What kind of oil should be used for a 1.5t engine?

How Long Is the Warranty Period for Car Air Conditioning?

Where is the Engine Start-Stop Button Located?

Do I Need to Dilute Windshield Washer Fluid with Water?