Can You Clean A Catalytic Converter?

Last Updated on October 6, 2023 by Matthew Lloyd

Yes, you can clean a catalytic converter. There are two methods: cleaning without removing it and cleaning by removing it. Both methods involve using appropriate cleaners. However, it’s important to note that cleaning should be considered only if there is a noticeable issue with the converter’s performance, and regular preventive maintenance is key to preserving its functionality. If internal components are damaged, or the converter is severely compromised, replacement may be necessary.

How Do You Clean A Catalytic Converter?

Method 1: Cleaning Without Removing The Catalytic Converter

1. Materials Needed:
   • Car Cat thinner
   • Gasoline (at least half a tank)
   • A scan tool to clear the check engine light (optional)
2. Procedure:
   • Add a gallon of catalytic converter cleaner when the gas tank is half-full.
   • Drive the car for approximately 150 miles or more at higher speeds, maintaining the engine speed at around 2500 RPM for about 30 minutes.
   • This will allow the lacquer thinner to run through the system and burn out impurities from the catalytic converter.
   • Optionally, after the cleaning process, you can use a scan tool to clear the check engine light if the inefficient catalyst code triggered it.
3. Benefits and Considerations:
   • Cleaning the cat converter with a catalytic converter cleaner can improve its efficiency and potentially resolve the catalyst efficiency code issue.
   • This method is cost-effective compared to replacing the catalytic converter outright.
   • It’s a relatively simple process that can be done without removing the converter.
   • Cleaning the catalytic converter is not a guaranteed fix, especially if the internal honeycomb structure is severely damaged or blocked.
   • If this method doesn’t work, you may need to explore alternative solutions or consider replacing the catalytic converter.

Method 2: Removing And Cleaning The Catalytic Converter

1. Materials Needed:
   • Automotive degreaser
   • Large container for soaking the converter
   • Penetrating oil (e.g., B’laster or WD-40)
   • Floor jack and jack stands
   • Wrench or impact wrench
   • Oxygen sensor wrench
   • Pressure washer
2. Procedure:
   • Allow the vehicle’s exhaust system to cool down before cleaning.
   • Safely jack up the car and secure it with jack stands for stability.
   • Use an oxygen sensor wrench to remove the oxygen sensor(s) connected to the catalytic converter.
   • Apply penetrating oil to the bolts attaching the converter. Professional assistance is recommended if the converter is welded or attached to the turbo.
   • Once the bolts are loose, carefully remove the catalytic converter.
   • Inspect the converter for any signs of internal damage or rattling. If it’s severely damaged, a replacement is necessary.
   • Clean the external surface of the converter using an automotive degreaser.
   • With a pressure washer on low settings, rinse the inlet and outlet pipes, ensuring debris removal.
   • Prepare a container with hot water and a degreaser. Soak the catalytic converter in the solution for no more than an hour.
   • After the soak, rinse the converter thoroughly using the pressure washer on low settings.
   • Allow the converter to drain and dry completely before reinstallation.
   • Reinstall the converter and the oxygen sensor(s) using the appropriate tools.
   • Take the car for a test drive to evaluate the improvement in performance and emissions.

Best Catalytic Converter Cleaning Products:

1. Catalytic Converter Cleaner New Technology Very Effective Kit:
   • Provides intensive cleaning for catalytic converters.
   • Includes two products: one for the gas tank and another for direct application on the catalyst through the O2 sensor port.
   • Designed with high-quality new technology by industry leaders.
   • Suitable for use in all petrol, diesel, and hybrid vehicles.
   • Removes existing deposits and ensures proper operation of the catalytic converter, turbocharger, and EGR valve.
   • Offers engine performance restoration and protection against heavy dirt buildup.
2. AUTOPROFI OXICAT Oxygen Sensor & Catalytic Converter Cleaner for Preventive Maintenance:
   • Utilizes innovative decarbonizing technology to clean the entire exhaust system, dissolving soot and carbon deposits.
   • Requires the vehicle to reach and sustain the working temperature of the catalytic converter for maximum effectiveness.
   • Ideal for preventing the buildup of noxious residue and passing emissions tests.
   • Engineered to meet or exceed environmental standards, promoting vehicle and environmental protection.
   • Works as part of a proactive care plan for optimal vehicle performance and engine life.

Frequently Asked Questions (FAQs):

Key Takeaways:

• Cleaning a catalytic converter can be attempted before considering a costly replacement.
• Method 1 involves using pure lacquer thinner and driving the vehicle for an extended period to burn out impurities.
• Method 2 requires removing the catalytic converter, cleaning it manually, and reinstalling it.
• Popular cleaning products include Catalytic Converter Cleaner New Technology and AUTOPROFI OXICAT.
• Cleaning the catalytic converter is not always a guaranteed solution, especially if severe internal damage is present.

Conclusion:

Catalytic converter cleanout can be a viable solution for restoring efficiency and resolving issues that trigger the check engine light. Whether you choose the cleaning method without removing the converter or opting to remove it, you can take steps to improve its performance. Remember, if you encounter persistent issues with your catalytic converter or if internal components are damaged, it may be necessary to replace the converter. In such cases, it is advisable to seek professional assistance to ensure proper installation and functionality.

Always consult your vehicle’s manufacturer guidelines and consider professional advice to determine the most suitable course of action for your specific situation. With proper care and maintenance, you can keep your catalytic converter in good working condition, contributing to a cleaner environment and smooth driving experience.

References And Citations:

Here are some suggested external links related to the topic, along with their corresponding anchor text:

1. Understanding and Troubleshooting Catalytic Converter Problems Anchor Text: catalytic converter problems
2. How to Clean a Catalytic Converter Without Removing It Anchor Text: clean a catalytic converter without removing it
3. Signs of a Failing Catalytic Converter Anchor Text: failing catalytic converter
4. Best Catalytic Converter Cleaners Anchor Text: catalytic converter cleaners
5. Proper Maintenance of Your Catalytic Converter Anchor Text: proper maintenance of your catalytic converter