What is the problem with rust on the exhaust pipe of a new car?
2 Answers
Rust on the exhaust pipe of a new car may be caused by frequent low-speed driving in the city or the engine not being warmed up before reaching the destination, resulting in accumulated water that cannot be "blown" out. Alternatively, the angle of the muffler at the tail end of the exhaust pipe may be deviated during design or assembly, preventing the accumulated water from draining properly. The maintenance methods for the car exhaust pipe are as follows: 1. Regularly inspect the exhaust pipe: Periodically check the exhaust pipe under the car for any external damage. If the exhaust pipe is cracked, repair it promptly to avoid affecting vehicle operation. 2. Listen for unusual sounds from the exhaust pipe: If there is abnormal noise from the exhaust pipe while driving, it may be due to vibration or loose fixing screws. Visit a repair shop as soon as possible for reinforcement to prevent the issue from worsening. 3. Frequently check for foreign objects in the exhaust pipe: Since the exhaust pipe is exposed, it is prone to collecting various debris. Therefore, it is advisable to develop a habit of regularly inspecting the exhaust pipe opening to detect and address any issues promptly.
I've noticed that rust on new car exhaust pipes is quite common, which is usually related to materials and the environment. When a new car leaves the factory, the exhaust pipe may not be made entirely of stainless steel. Ordinary steel with an insufficiently thick coating can rust quickly in humid or salty areas. I used to live by the southern coast where the air has high salt content, and my car's exhaust system developed rust spots within just a few months. At first, I was very worried it would accelerate corrosion. However, minor rust doesn’t affect safety—if it’s just a surface layer, wiping it off is enough. But if the rust spreads deeply or causes holes, it can lead to exhaust leaks, resulting in loud noises and exhaust fumes flowing back into the cabin. I recommend applying a simple rust prevention treatment after driving a new car for six months, such as spraying a layer of automotive-grade rust-proof paint. After washing the car, ensure the exhaust pipe is dry, avoid parking in waterlogged areas, and take long drives regularly to heat and dry out the exhaust system.
