How to Clean the Automotive Three-Way Catalytic Converter?
2 Answers
Automotive three-way catalytic converter cleaning methods are as follows: 1. Start the engine and let it idle until the water temperature normalizes, then turn off the engine. 2. Pour the cleaning agent into a specialized device and connect the device's output connector to the vacuum tube. 3. Start the engine, maintain the RPM at around 2000, open the flow control valve, and slowly drip the cleaning agent into the intake manifold for approximately 30 minutes. 4. After cleaning, keep the engine running at the same RPM for 3-5 minutes to expel any residual liquid. Extended three-way catalytic converter cleaning intervals are as follows: 1. Generally, the three-way catalytic converter should be cleaned every 30,000 kilometers driven. 2. If you notice increased fuel consumption or reduced power, inspect the three-way catalytic converter and clean it as needed. 3. The three-way catalytic converter should be cleaned every time the vehicle undergoes fuel injector, throttle body, and intake manifold maintenance. 4. It is also advisable to clean the three-way catalytic converter before annual exhaust emission testing.
The most common method for cleaning a car's catalytic converter is the additive approach. Purchase a professional catalytic converter cleaner, add it to the fuel tank, and then drive at high speeds or for extended periods to allow the engine to run thoroughly. This way, the cleaner flows through the catalytic converter, dissolving carbon deposits and blockages. I've used this method several times and found it quite effective, provided the catalytic converter isn't completely clogged. Regularly changing the oil and avoiding short trips can help reduce blockages. Never attempt to disassemble it yourself—professional shops use specialized equipment to safely flush out internal deposits, as improper handling can damage the part and affect emissions. Frequent cleaning can extend the catalytic converter's lifespan and reduce replacement costs, making it a much cheaper option compared to repairs.
