What Are the Most Correct Methods for Cleaning a Three-Way Catalytic Converter?
2 Answers
The correct methods for cleaning a three-way catalytic converter are as follows: 1. Adding a cleaning agent to the fuel tank: This method is very common in the market, with the biggest advantage being its low cost and simple operation. You only need to add this type of cleaning agent directly to the fuel tank. However, the cleaning effect this product has on the three-way catalytic converter is minimal. This is because the product is almost completely burned out by the time it reaches the three-way catalytic converter after combustion in the combustion chamber, leaving almost no cleaning effect. 2. Drip cleaning: Drip cleaning, also known as no-disassembly cleaning, is currently the most popular method for cleaning a three-way catalytic converter in the market. The biggest advantage is that it does not require removing the three-way catalytic converter, but the downside is the high cost of purchasing cleaning equipment and the limited cleaning effect. This drip cleaning method uses the intake vacuum to draw the cleaning agent into the combustion chamber. After combustion, it creates a high-temperature oxidation environment inside the three-way catalytic converter, converting sulfur, phosphorus compounds, and unburned residues from gasoline into gases like carbon dioxide and sulfur dioxide, which are then expelled through the exhaust pipe. This restores the activity of the precious metals on the three-way catalytic converter. 3. Disassembly cleaning: Disassembly cleaning is a very time-consuming and labor-intensive method. It requires completely removing the three-way catalytic converter from the vehicle, soaking it in a cleaning agent (such as oxalic acid or toilet cleaner) for a period of time, and then rinsing it with water. In fact, this is the most effective method for cleaning a three-way catalytic converter.
I used to deal with catalytic converter issues frequently. The most correct cleaning method is to drive the car to a professional repair shop and have them inject cleaning fluid using specialized equipment. This directly dissolves carbon deposits and dirt, restoring catalytic efficiency without worrying about damaging the internal structure. I've tried DIY before, but the risks are high—accidental clogging or corrosion can occur. Cleaning every 20,000 kilometers can extend its lifespan and prevent engine warning lights or increased fuel consumption. After cleaning, it's crucial to check the exhaust to ensure there's no black smoke or unusual odors. Don't skimp by using low-quality cleaners; opt for reputable brands with active ingredients for safety and effectiveness—otherwise, you'll get subpar results and waste money.
