Last Updated on October 6, 2023 by Matthew Lloyd
Cleaning a catalytic converter with lacquer thinner can effectively eliminate dirt and grime accumulating on the catalytic converter over time. Learning how to clean your catalytic converter with lacquer thinner properly is relatively simple. It requires just a few tools and some basic knowledge of the system.
How To Clean Catalytic Converter With Lacquer Thinner?

- To clean the catalytic converter with lacquer thinner, add the cleaner to a half-full gas tank.
- Then, drive around for at least 30 minutes, so the engine runs correctly, allowing the thinner to spread through the entire system and breaking down any dirt or grime buildup inside the catalytic converter.
Schedule some time for this process, as you’ll need enough time for your engine’s temperature to rise, allowing maximum effectiveness from your cleaner.
What’s The Best Way To Clean A Catalytic Converter?

Use An Aerosol Can:

The best way to clean a catalytic converter with lacquer thinner is by using an aerosol can. If you intend on doing this, wear safety glasses and gloves while handling the lacquer thinner. Ensure to thoroughly ventilate the area and keep any open flame or spark away from the area.
Begin by shaking the aerosol can well, then spray a generous amount of lacquer thinner onto a clean rag until it’s slightly dampened. Carefully rub down the catalytic converter with the rag, ensuring not to get too close as you may damage other parts of your vehicle’s exhaust system. Afterward, use a brush or toothbrush dipped in lacquer thinner to scrub off any tough deposits that have built up over time. Rinse any remaining residue with water before reassembling your catalytic converter and starting your car.
Remove And Soak It Overnight In Ordinary Dawn Dishwashing Soap:

Use Dawn dishwashing soap to remove the accumulated dirt and grime on the converter. Fill a container or bucket with warm water and add one or two tablespoons of Dawn dishwashing soap. Submerge the catalytic converter into the soapy water solution and allow it to sit overnight. The soap will break down any dirt particles stuck to the surface of the catalytic converter while also helping to dissolve any grease that may be present. It’s important to note that this process should only be used as a last resort if all other methods have failed.
What Is The Best Cleaner For A Catalytic Converter?
Cataclean 120007 Cleaner:

Cataclean 120007 Cleaner is a fuel and exhaust system cleaner that can be used to clean the catalytic converter. This product helps reduce carbon build-up in the catalytic converter, improving engine performance and fuel efficiency. It also helps reduce emissions from the vehicle. The product features a patented blend of hydrocarbon-based detergents and dispersants that help break down dirt and debris in the catalytic converter, allowing it to work more efficiently.
Cataclean 120007 is suitable for use with both gasoline and diesel engines, making it an ideal choice for those who own multiple vehicles. The product can be purchased from Amazon at an affordable price point, making it an excellent option for those looking for an effective way to clean their catalytic converter without breaking the bank.
DURA LUBE Catalytic Cleaner

Dura Lube Catalytic Cleaner is a specially formulated cleaner that effectively cleans a catalytic converter with lacquer thinner. The product comes in an aerosol spray bottle, making it easy to apply directly to the converter. It contains powerful solvents and inhibitors which break down and dissolve the deposits that build up on converters over time. This helps restore the converter’s efficiency and performance.
Dura Lube Catalytic Cleaner is also designed to safely use all exhaust systems, including stainless steel or aluminum. It also prevents rusting or corrosion while helping reduce emissions levels as well. The product can easily be applied by spraying a generous coat onto the converter surface before letting it dry for several minutes. Afterward, any excess should be wiped off with a soft cloth before starting the engine.
Autoprofi OXICAT Catalytic Converter Cleaner

Autoprofi OXICAT Catalytic Converter Cleaner is an excellent solution for cleaning your catalytic converter without lacquer thinner. This liquid product can be used directly on the catalytic converter to dissolve built-up deposits. It works by breaking down the harmful particles that accumulate in the catalytic converter, allowing it to work more efficiently. OXICAT has been specifically designed to clean gasoline and diesel engines, making it suitable for most vehicles today.
When Cleaning Catalytic Converter, What Should I Put In My Car Gas Tank?

Using a fuel cleaner or fuel additive when filling up your car’s gas tank is also essential to help keep the catalytic converter clean. Fuel cleaners and additives are designed specifically for engine maintenance and will help remove any build-up of debris or contaminants from inside the engine components. This will reduce wear on the catalytic converter over time and improve its performance.
How Much Lacquer Thinner Do You Use To Clean A Catalytic Converter?

The recommended ratio is 1 part lacquer thinner to 2 parts water. This should be mixed in a spray bottle and then sprayed onto the converter from a distance of about 15 cm. It is best to allow the liquid to soak for several minutes before scrubbing with a wire brush or rag. After scrubbing, the converter must be rinsed off with water and allowed to dry completely before reinstalling it into your vehicle.
Will Lacquer Thinner Hurt Your Car Engine?

The main concern with using lacquer thinner on a catalytic converter is that its highly volatile nature may cause spark plugs to ignite if they come into contact with the solvent’s fumes. This could lead to a backfire or even an explosion under certain circumstances. Additionally, some parts of the catalytic converter are made from rubber materials that could weaken and become brittle after prolonged exposure to lacquer thinner.
Conclusion:
Cleaning a catalytic converter with lacquer thinner can be a beneficial and cost-effective way to improve the efficiency of your vehicle. While it can improve performance, it is important to consider whether or not this is the best option for your situation. When deciding, consult an experienced mechanic who can advise which course of action will yield the best results. Additionally, ensure you take safety precautions and dispose of all materials following local regulations.