What are the methods for cleaning a three-way catalytic converter?

[August]

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.

[SaraRose]

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.

[LaAshley]

After running this auto repair shop for so many years, I've seen plenty of catalytic converter cleanings. The professional method mainly involves mechanical spray cleaning equipment. In the shop, we typically use a high-pressure air gun with specialized cleaning solvent, spraying it into the exhaust port to dissolve blockages like carbon deposits or lead residues—this method delivers the most reliable results. The process is performed while the engine is running to ensure even coverage, and the whole thing takes about half an hour. For severe blockages, we'd recommend either manual cleaning after removal or direct replacement with a new part to save the hassle. It's crucial to diagnose whether the converter is truly clogged before and after cleaning, such as by reading fault codes and analyzing exhaust emissions—otherwise, it's just wasted effort. Prevention is also important, like regular oil and air filter changes to reduce contaminants entering the system. Prices vary by vehicle model, but a standard cleaning can be done for a few hundred bucks, far cheaper than a new converter. Safety first—don't attempt DIY fixes to avoid accidents.

[AlexisFitz]

People who drive eco-friendly cars pay special attention to the condition of the catalytic converter, as blockages can affect emission reduction. There are various cleaning methods available, with the most common being fuel additive cleaning—just pour a bottle into the fuel tank during refueling, and the vehicle will automatically clean the internal passages while running. I make it a habit to perform this maintenance every six months to avoid exceeding emission standards. Another method is professional cleaning at a repair shop, where specialized equipment is used for deep cleaning, suitable for severe blockages. Daily prevention is crucial: using high-quality fuel to avoid lead content and regularly checking the exhaust system to reduce carbon buildup. Cleaning costs are low, but it saves fuel, extends the catalytic converter's lifespan, and reduces repair needs. Simple and easy steps to maintain the car's green performance.