What are the methods for cleaning a three-way catalytic converter?
2 Answers
Currently, the mainstream cleaning methods for three-way catalytic converters are additive cleaning and drip cleaning. However, neither additive cleaning nor drip cleaning provides a very high level of cleaning effectiveness for the three-way catalytic converter. For a more thorough cleaning, the only option is to remove and clean it manually. However, due to the relative complexity, time consumption, and effort required, most 4S shops and repair shops do not offer this disassembly cleaning service. The specific operation steps are as follows: 1. First, use a lift to raise the vehicle and completely remove the three-way catalytic converter. 2. Soak and clean the three-way catalytic converter with an oxalic acid solution (mixed with water at a ratio of 1:10), then rinse it thoroughly with clean water. 3. Reinstall the cleaned three-way catalytic converter back into the vehicle and start a test drive.
As a car enthusiast, I've handled catalytic converter cleaning many times myself, and the most common method is using specialized chemical additive cleaning solutions. This type of cleaner is poured directly into the fuel tank, and flows through the converter while the vehicle is running, dissolving carbon deposits and blockages. It works well and saves both money and effort. I remember last time when my car had poor exhaust flow and increased fuel consumption, using this product made a noticeable improvement. Additionally, some DIY tutorials mention the high-temperature calcination method, which involves idling the car to a high-temperature state before shutting it off to burn off impurities with heat, but I've tried it and think it's too risky and could damage the system. Before cleaning, it's essential to check if the catalytic converter has any physical damage, such as cracks or holes, because cleaning solutions can't fix structural issues. Regular cleaning can extend its lifespan and avoid the high cost of replacing a new converter, especially since OEM parts are quite expensive. The whole process is very safe, but make sure to use genuine cleaning solutions and avoid cheap, off-brand products.
