What Causes the Noise Under the Chassis After the Car is Turned Off?

[Connor]

This is primarily due to the sound caused by the cooling of the exhaust pipe's three-way catalytic converter after the engine is turned off, which is a normal phenomenon of thermal expansion and contraction. Below is a related introduction about the chassis: Introduction: The chassis refers to the combination of the transmission system, running system, steering system, and braking system in a car. It supports and installs the car engine and its various components and assemblies, forming the overall shape of the car, bearing the engine's power, and ensuring normal operation. Function: The role of the chassis is to support and install the car engine and its various components and assemblies, forming the overall shape of the car, and receiving the engine's power to make the car move and ensure normal operation. At the same time, a good chassis can ensure the driver's safety.