It is the discoloration of the muffler that many people are concerned about. When the car encounters a situation that is difficult to start, you should first close the choke door to start the engine, and pay attention to opening the choke door in time. Do not drive at high speed and low gear for a long time with the choke door closed. This will cause damage to the engine and the muffler; secondly, pay attention not to hit the throttle at high speed on the spot for a long time, because when there is oil on the surface of the muffler, after you start the car It will make the surface color change yellow. In addition, when there is a lot of dirt and other dirt on the surface of the muffler, it must be cleaned up in time to avoid affecting its heat dissipation function.
Although the exhaust pipe is not a precision part inside the car and is exposed to the outside, many people think it must be a durable part. So even if it is covered with dirt, it will be considered normal. But a very important point is that the car exhaust hole can connect foreign matter with the car interior, and its main function is to exhaust the car interior exhaust gas. However, if you drive improperly, substances that are harmful to the interior of the car will enter the car through the car vent. Therefore, the maintenance of the exhaust pipe is the maintenance of the interior of the car in various senses.