Can the Core of a Three-Way Catalytic Converter Be Replaced?
2 Answers
The core of a three-way catalytic converter cannot be replaced, as merely changing the core will not pass vehicle inspection. Definition of a Three-Way Catalytic Converter: A three-way catalytic converter is the most important external purification device installed in a vehicle's exhaust system. It converts harmful gases such as CO, HC, and NOx emitted from the vehicle's exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. Cleaning of a Three-Way Catalytic Converter: The cleaning method for a three-way catalytic converter is by using an intravenous drip. This method involves connecting a plastic hose to the engine's vacuum solenoid valve and using the air pressure in the hollow tube to draw the cleaning agent from the infusion bottle into the engine. The cleaning agent then cleans the three-way catalytic converter as it exits through the exhaust pipe. Lifespan of a Three-Way Catalytic Converter: The lifespan of a three-way catalytic converter is generally between 80,000 to 100,000 kilometers. The specific lifespan depends on the vehicle's usage conditions, and it is also related to the quality of the fuel used and the driving environment.
Speaking of the catalytic converter, I often study automotive structures and have noticed it indeed has an inner core, primarily composed of a ceramic substrate and a catalyst coating. Theoretically, it can be replaced—for instance, if the old converter's outer shell is intact, replacing just the core can reduce costs. However, in reality, the operation is complex: it requires professional tools to dismantle the entire exhaust pipe, carefully remove the old core, and install the new one. Mishandling can easily cause the ceramic core to crack, affecting the exhaust purification efficiency. More commonly, the entire catalytic converter unit is replaced as a whole, since most modern vehicles are designed with a one-piece structure, and the labor cost for disassembly might even exceed that of a new unit. Additionally, after replacement, it's essential to check if the emission system functions properly to avoid triggering the malfunction indicator light. I recommend car owners consult professional repair shops, prioritizing both cost-effectiveness and reliability.
