What is the most effective way to clean a three-way catalytic converter?
2 Answers
Here are the methods for cleaning a three-way catalytic converter: 1. Non-disassembly cleaning with an IV bottle: The principle is to use the engine's own negative pressure to draw the three-way catalytic cleaning fluid from the intake vacuum tube. After combustion in the combustion chamber, it creates a high-temperature oxidation environment on the surface of the three-way catalytic converter. Through oxidation-reduction reactions, the chemical complexes blocking the three-way catalytic converter are decomposed into sulfur dioxide and carbon dioxide gases, which are then expelled, restoring the activity of the three-way catalytic converter. 2. Complete disassembly cleaning: This method is more thorough. After disassembly, the three-way catalytic cleaning fluid is directly poured into the three-way catalytic converter for soaking, allowing the blocked particles to dissolve in the cleaning fluid, which is then drained from the three-way catalytic converter.
I've always believed that the most effective way to clean the three-way catalytic converter is the DIY method using specialized chemicals, such as purchasing cleaning fluids specifically designed for exhaust systems. Here's how I do it: simply add the cleaner to the fuel tank or spray it into the intake manifold, then drive for 30-50 kilometers to allow it to circulate and break down carbon deposits. Remember to choose reputable brand products and follow the dosage instructions carefully—overuse may corrode components. After cleaning, the engine runs smoother, with reduced noise and lower fuel consumption, while also preventing clogging that could affect emissions. Performing this cleaning every 20,000 kilometers yields even better results—saving money and hassle—but only if the vehicle itself doesn't have major issues. If carbon buildup is too severe, the effect may be limited, and professional treatment might be necessary.
