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What Causes Brake Noise When Starting the Car in the Morning?

1 Answers

Rhett

07/30/25 12:27am

Brake noise when starting the car in the morning is caused by thermal expansion and contraction, which results in a smaller gap between the brake disc and brake pads. At this time, the frictional resistance of the brakes increases, leading to unusual noises. This is a normal phenomenon and does not require additional treatment. Brake pads are high-frequency replacement parts on a car and have a significant impact on driving experience. Generally, it is recommended to replace brake pads every 10,000 kilometers, but the actual need for replacement should be determined based on daily driving conditions and the driver's habits. Brake maintenance methods: Regularly replace brake fluid: The key to brake fluid maintenance is ensuring it does not deteriorate, especially by preventing moisture ingress. Brake fluid should be replaced every 50,000 kilometers. If driving frequently in humid areas, the replacement interval should be shortened accordingly. Brake adjustment: If the car noticeably veers left or right when braking, this is caused by asynchronous front-wheel braking. Because the brakes pull to one side (left or right), especially during high-speed driving, it is essential to visit a repair shop immediately for brake adjustment. New car brake break-in: Every new car has a break-in period during initial use, and an indispensable part of this is the brake system break-in. The first 1,000 kilometers are crucial for a new car's break-in, and the brake system also needs to be broken in. It is best to avoid emergency braking during this period. For a smooth break-in, the clutch should be pressed before braking. Avoid frequent braking: In addition to inspecting and maintaining the brake system's components and fluids, the driver's habits also significantly impact the brake system. For example, when descending a mountain highway without engine braking, frequent braking should be avoided, as it can overheat the brake pads (or drums) and cause loss of braking function. Instead, use low-speed coasting and rely on the engine's traction to assist braking. Also, remember not to coast in neutral, as without the engine's vacuum assist, the brake system becomes "disabled."

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What Are the Five Taboos for Turbocharged Cars?

Here are the five taboos for turbocharged cars: 1. Avoid stomping on the accelerator at startup: One of the key features of turbocharged cars is their quick acceleration, but you should not stomp on the accelerator immediately after starting. Doing so can easily damage the turbocharger's oil seal. Instead, let the engine idle for a while to allow the lubricating oil to fully coat the bearings before the turbocharger rotor reaches high speeds. This will result in more effective acceleration. 2. Do not shut off the engine immediately: Especially after prolonged high-speed operation, abruptly stopping the engine while it is still hot can cause the residual oil in the turbocharger to overheat, damaging the bearings and shaft. Therefore, let the engine idle for a minute or two before shutting it off. 3. Use high-quality oil: Since turbochargers often operate at speeds exceeding 150,000 RPM, improper oil usage can significantly affect the turbo's lifespan. Always use the manufacturer-recommended or higher-grade full synthetic oil to ensure proper lubrication for the turbocharger and engine, reducing friction and wear. 4. Avoid prolonged idling: During idling, the engine and turbocharger operate at low speeds, causing the gas pressure in the turbo and compressor to drop below the bearing housing pressure. This can lead to oil leakage into the compressor and turbo, depriving the bearings of proper lubrication and cooling. Additionally, oil leaking into the compressor may enter the cylinders, disrupting normal engine operation. Therefore, avoid excessively long idling periods. 5. Clean the oil lines promptly: Since turbochargers frequently operate at high temperatures, the oil lines can develop partial carbon deposits due to heat exposure, leading to insufficient lubrication of the turbocharger bearings and potential damage. Thus, the oil lines should be cleaned periodically after extended use.

What to Do If the Highway ETC Fails to Deduct Payment?

Generally, after the first deduction failure, the system will send an SMS to the car owner to remind them of the failed payment and will attempt to deduct the payment again within the next 2-3 days. If the deduction fails again, it will enter a manual intervention process to determine the exact reason for the failure. If it is due to a malfunction of the bound card or a system issue, the staff will make corresponding changes to the system or card. Below is an introduction to ETC: 1. ETC is an electronic toll collection system: ETC is a non-stop electronic toll collection system. The ETC-dedicated lane is for vehicles equipped with an ETC on-board unit, using electronic payment methods. 2. It is the most advanced toll collection method: The non-stop toll collection system is currently the most advanced bridge and road toll collection method in the world. Through the dedicated short-range microwave communication between the on-board electronic tag installed on the vehicle's windshield and the microwave antenna in the ETC lane at the toll station, the system uses computer networking technology to conduct background settlement processing with the bank, allowing vehicles to pass through toll stations without stopping to pay bridge and road fees.

How to Remove ETC Device?

You can use a hairdryer to blow hot air at the joint between the OBU device and the windshield. The adhesive tape on the back of the device will soften when heated, reducing its stickiness. Then, the owner can slowly twist and remove the OBU device by hand or use a plastic scraper to gently scrape it off. Alternatively, soak a towel in hot water and place it on the outside of the windshield to heat the adhesive tape on the back of the OBU device. Wait for the tape to soften before removing the device. Another method is to use sunlight to heat the adhesive tape on the back of the OBU device. On a hot, sunny day, park the car in an open area to expose the device to direct sunlight until it softens, then remove it. You can also visit the ETC service office and ask staff for assistance. They may spray some tar remover and then use a plastic scraper to slowly remove the OBU device. Benefits of Installing ETC: Save time by avoiding queues and waiting. Environmentally friendly, as vehicles pass through toll stations without stopping, reducing noise and exhaust emissions and minimizing pollution. Reduce wear and save costs by decreasing the frequency of vehicle starts and brakes, lowering wear and fuel consumption. Users can also enjoy a 5% discount on toll fees. Improve efficiency—ETC lanes can theoretically increase vehicle throughput by 2-3 times, making traditional ETC faster, more advanced, and more high-tech. Compared to license plate payment, ETC technology is more mature and advantageous.

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What is the fastest way for beginners to familiarize themselves with gear positions?

Drive in open areas or on roads with minimal traffic to familiarize yourself with gear positions while moving. The test content includes the following four parts: 1. Subject 1: Road traffic rules, traffic signals, handling of traffic safety violations and accidents, regulations on the application and use of motor vehicle driving licenses, motor vehicle registration, and other road traffic safety laws, regulations, and rules; 2. Subject 2: Testing the ability to reverse into a parking space, assessing the mastery of motor vehicle driving skills and the ability to judge the spatial position of the vehicle; 3. Subject 3: Assessing the ability to complete driving test items on the road, comply with traffic laws and regulations, and comprehensively control the vehicle; proper use of lights, horns, seat belts, and other equipment; ability to correctly observe and judge road traffic conditions; 4. Subject 4: Extracting knowledge related to safe and civilized driving from Subject 1, as well as safe driving skills under complex conditions and emergency handling in critical situations, conducted after the actual road driving test of "Subject 3" to further assess the candidate's traffic awareness.

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