What Causes the Noise After Replacing the Three-Way Catalytic Converter?
1 Answers
After replacing the three-way catalytic converter, the noise in the car may be caused by a cracked shell or a damaged filter. Cracked Shell: Visit a repair shop to have a technician perform welding. It is not recommended for car owners to remove the three-way catalytic converter themselves, as this involves disassembling the oxygen sensor, which requires certain technical skills. Damaged Filter: Replace it again. Lifespan of the Three-Way Catalytic Converter: The service life of a three-way catalytic converter ranges between 80,000 to 100,000 kilometers. The specific lifespan depends on the vehicle's usage conditions, as well as the quality of the fuel used and the driving environment. Composition of the Three-Way Catalytic Converter: The three-way catalytic converter generally consists of four parts: the shell, damping layer, substrate, and catalyst coating. The shell is made of stainless steel to prevent oxide scale from falling off, which could clog the substrate. The damping layer is composed of gaskets or wire mesh pads, serving to seal, insulate, and secure the substrate. To protect the substrate from damage caused by vibration, thermal deformation, and other factors, the gasket is made of expanded mica and aluminum silicate fibers, bonded with adhesive. The substrate is made of honeycomb-shaped ceramic materials, though many also use metal (including stainless steel) materials. The catalyst consists of precious metals such as platinum, rhodium, and palladium, sprayed onto the substrate to form the purifying agent.
