How Long Does It Take to Remove a Three-Way Catalytic Converter?
3 Answers
Removing a three-way catalytic converter is a time-consuming and labor-intensive process. Here is some information about three-way catalytic converters: Introduction to Three-Way Catalytic Converters: A three-way catalytic converter is a device that converts harmful gases emitted from vehicle exhaust into harmless substances through oxidation and reduction reactions. Functions of Three-Way Catalytic Converters: (1) Improve fuel atomization, enhance combustion efficiency, reduce fuel consumption, and save 5-20% of fuel. (2) Enhance cold-start capability at low temperatures and reduce noise. (3) Boost engine performance, extend the lifespan of both the engine and the catalytic converter, and ensure proper vehicle maintenance.
Last time I helped a friend remove the catalytic converter from an old Corolla at his shop, it took about two and a half hours. The actual time depends on the situation. If the car model is well-designed and the bolts aren't rusted shut, it can be done in just over an hour. But with SUVs that have complex underbody protection or screws caked solid with mud, you might need to slowly cut them with an angle grinder - three-hour jobs are common. You have to first disconnect the exhaust pipe section, then unscrew the oxygen sensor with a wrench, and finally remove the converter itself, constantly adjusting the jack height throughout the process. I recommend going to a professional repair shop - they have all the equipment and work faster, doing it yourself risks injury and wastes time.
Removing the catalytic converter can be quick or slow, depending on several factors. The car model has the greatest impact—some vehicles require removing the engine cover first. The level of bolt corrosion is also troublesome; if they're badly rusted, you'll need to spray rust remover and wait half an hour. The easiest car we've worked on was the Fit, done in 40 minutes; the toughest was the Land Cruiser, taking nearly four hours. The most time-consuming part is the front oxygen sensor—excessive torque can easily strip the threads. It's best to work on a sunny day with all tools prepared to avoid chaos. We recommend buying new gaskets in advance, as the original ones are usually ruined during removal.
