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What Causes Car Brakes to Squeak on Rainy Days?

1 Answers

StephanieAnn

07/29/25 12:56pm

Car brake noise on rainy days may be caused by fine sand carried by water adhering to the brake disc, or rust on the brake disc after rain. It could also indicate a fault in the brake system. The specific reasons for car brake noise on rainy days are explained as follows: 1. Foreign objects adhering to the brake disc: Fine sand carried by water adheres to the brake disc, or humid weather or large temperature differences between day and night cause condensation or rust on the brake disc after rain, which acts like tiny particles. Car brake pads can be hard or soft. Hard pads are more wear-resistant, but if there are tiny particles between the hard brake pads and the gray cast iron brake disc, they can produce a sharp squeaking sound. A few brake applications will wear off these small particles. 2. Missing screws: Missing or damaged fixing screws on the brake disc can also cause brake noise. 3. Brake system malfunction: A fault in the brake system requires inspection and repair at a 4S shop or repair shop. 4. Worn brake pads: Brake pads worn down to the wear indicator. If a hissing sound occurs every time you brake for several days, and it becomes louder and more frequent, it indicates that the brake pads are almost worn out. Brake pads usually have some hard metal fragments embedded at the bottom intentionally. When these fragments are exposed, they produce a metallic hissing sound, alerting the owner that the brake pads need replacement soon. At this point, the brake pads should be replaced.

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Are Pickup Trucks Exempt from Highway Tolls During Holidays Like Passenger Cars?

Pickup trucks are not exempt from highway tolls during holidays. Pickup trucks are classified as dual-purpose passenger and cargo vehicles and are not included in the toll-free category. On July 24, 2012, the State Council issued the "Implementation Plan for Exempting Small Passenger Vehicles from Toll Charges on Major Holidays." The plan stipulates that toll-free periods apply during four national statutory holidays: Spring Festival, Qingming Festival, Labor Day, and National Day, as well as the consecutive holidays determined by the State Council for these statutory holidays. Highway Toll Standards: Both 5-seat and 7-seat family vehicles are charged according to the Class 1 vehicle standard. The toll rate for four-lane highways is 0.45 yuan per kilometer, and for six-lane or wider highways, it is 0.6 yuan per kilometer. Highway Distribution: Currently, there are 36 national highway routes in China, including 7 radial highways originating from the capital, 11 north-south longitudinal highways, and 18 east-west transverse highways. China has the world's largest highway mileage.

Can You Drive with 195 Tire Pressure?

Tire pressure of 195 should not be driven on. Generally, the standard tire pressure for most tires is 240-250 kPa, so 195 kPa is considered relatively low. Continuing to drive with such low pressure can lead to sidewall damage, compromising driving safety. Definition of Tire Pressure: It refers to the air pressure inside the tire. There are several types of tire pressure gauges, with digital ones being relatively simple, displaying the pressure directly. Tire Pressure Precautions: To ensure accurate readings, tire pressure should always be measured when the tires are cold. Tire pressure can be displayed indirectly or directly on the dashboard. If the tire pressure is abnormal, the tire pressure warning light on the dashboard will illuminate. Tire pressure should be kept as consistent as possible across all tires. Significant differences in pressure can lead to uneven tire wear over time, and in severe cases, may cause issues like pulling to one side or uneven braking force distribution.

What procedures are required for changing the vehicle body color?

The following procedures are required for changing the vehicle body color: 1. Fill out the "Motor Vehicle Change Registration/Record Application Form". 2. Bring the original and photocopy of the vehicle owner's identity document. 3. Carry the original "Motor Vehicle Registration Certificate" and "Original Motor Vehicle License". 4. Pay all fines incurred before the color change. Here are the precautions for changing the color: 1. The body color cannot be the same as or similar to that of special vehicles. 2. Vinyl wrap color changes cannot exceed one-third of the vehicle's surface area. 3. The body color cannot exceed three types. The color change application process is not complicated. You can first change the vehicle color, then make an appointment with the DMV for the application time, and drive to the DMV during the scheduled time to complete the procedure. A more reliable method is: Before changing the color, consult the DMV to confirm whether the selected color is allowed for change. After receiving confirmation, proceed with the vehicle color change, then schedule an appointment to complete the change registration procedure. The processing time for the body color change registration is not long. If the DMV is efficient, it can all be completed in less than half an hour. It is recommended that owners who need to complete the change procedure choose a weekday, prepare the necessary documents, and visit the DMV to complete the process.

Can a tire pressure of 195 drive normally?

A tire pressure of 195 cannot drive normally. The normal cold tire pressure should be between 2.2-2.5 bar, and the recommended cold tire pressure is 2.5 bar, which results in lower fuel consumption and ensures that the tire pressure remains within the safe range of 3.0 during high-speed driving. The following are relevant introductions about tire pressure: Tire pressure requirements for different vehicle models: The optimal tire pressure is not a fixed value but varies depending on the vehicle model. The standard tire pressure for each model is indicated in the vehicle's user manual, on the inside of the fuel tank cap, or below the B-pillar on the passenger side. Regular tire pressure checks ensure safety: Before traveling, observe the tire condition. For low-pressure tires, as long as the flatness is not too low, it is normal if they feel very elastic when pressed with the foot, not too soft. For high-pressure tires, which are bias-ply tires with inner tubes, check that the tire shoulder does not bulge when viewed from the front, commonly referred to as "not swollen cheeks," and that the contact area with the ground when viewed from the side is similar to usual.

What are the reasons for no response when starting the car?

The reasons for no response when starting the car are as follows: Engine malfunction: Related to issues such as poor performance of the main injector, cold start injector, temperature control switch, ECU and control circuit, weak battery, damaged ignition or pulse generator, fuel system not supplying fuel or supplying fuel abnormally, etc. Automatic transmission malfunction: Slow acceleration, strong impact during automatic gear shifting, high oil temperature, lack of high-speed gear, failure to start, inability to change the gear lever position, etc. Most faults in automatic transmissions are caused by untimely maintenance and adjustment, apart from component failures due to long-term use.

Should the Subaru XV use 92 or 95 octane gasoline?

Subaru XV can use either 92 or 95 octane gasoline. Here is some relevant information about 92 and 95 octane gasoline: 1. The octane rating of gasoline (92 or 95) represents the fuel's anti-knock property. The higher the octane number, the greater the content of isooctane, indicating better anti-knock performance. The main difference between these two types of gasoline lies in the composition of n-heptane and isooctane. 92 octane gasoline contains 92% isooctane and 8% n-heptane, while 95 octane gasoline contains 95% isooctane and 5% n-heptane. 2. What car owners need to do is: carefully read the vehicle's manual, understand the compression ratio of the engine, and follow the fuel standards specified in the manual. 3. The primary criterion for selecting gasoline octane rating is the engine's compression ratio, which is also a core energy-saving indicator of modern cars. Engine operation consists of a continuous cycle of "intake-compression-combustion-exhaust-intake" in the cylinders. The compression ratio is the ratio of the cylinder volume when the piston is at the farthest and nearest points of its stroke. 4. The best way to reduce fuel consumption costs is to increase the engine's compression ratio. Increasing the compression ratio only changes the piston stroke. The more the air-fuel mixture is compressed, the greater the combustion reaction, leading to more complete combustion. The compression ratio is matched with an indicator, which is the anti-knock property of gasoline, also known as the octane rating or gasoline grade.

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