What Causes Exhaust Pipe Abnormal Noise?

[VanSara]

Here are the reasons for abnormal noise in the exhaust pipe: 1. Exhaust pipe damage: The engine exhaust emits high-temperature and high-pressure waste gas, along with some backfire explosions. Therefore, the exhaust pipe must be used for noise reduction and purification. If the exhaust pipe is damaged (with gaps), waste gas will escape from these gaps, resulting in a "popping" sound. 2. In multi-cylinder engines (most car engines are four-cylinder), the exhaust processes of each cylinder are interconnected. If one cylinder stops working, the exhaust sequence will be disrupted, causing a "popping" sound in the exhaust pipe. (If the non-working cylinder is due to ignition failure or other reasons, the expelled combustible mixture will explode and burn inside the exhaust pipe, resulting in a more intense popping sound).