The role of automobile three-way catalytic converter

The three-way catalytic converter is one of the most important parts of modern automobile emission control systems. Its main function is to catalytically convert harmful substances (such as carbon monoxide, nitrogen oxides and hydrocarbons) in the exhaust gas produced by the engine into harmless or low-harm substances that are discharged out of the vehicle.

The location of the automobile three-way catalytic converter

The three-way catalytic converter is usually installed in the middle of the car exhaust pipe, just after the engine, in order to capture the exhaust gas emitted by the engine. This position ensures that the three-way catalytic converter can effectively convert harmful substances in the exhaust gas under the action of high temperature and catalyst.

How to replace the automobile three-way catalytic converter

Preparation: Make sure the vehicle is in a safe position and turn off the engine. Disconnect the negative cable of the battery to prevent accidental starting.
Removing the old three-way catalytic converter: First, you need to remove the parts related to the three-way catalytic converter, such as the exhaust manifold, muffler, etc. Then, loosen the bolts that fix the old three-way catalytic converter and carefully remove it from the exhaust pipe.

Installing the new three-way catalytic converter: Install the new three-way catalytic converter to the exhaust pipe according to the old installation position and direction, and make sure that all fixing bolts are tightened.
Connecting parts: Reinstall the parts related to the three-way catalytic converter, such as the exhaust manifold, muffler, etc. And make sure that all interfaces are tightly connected.

Starting and testing: Start the engine and observe its operation. At different engine speeds, check the sound and performance of the exhaust to ensure that the new three-way catalytic converter works properly.

When should the catalytic converter be replaced?

Reaching the service life: The service life of the three-way catalytic converter depends on many factors, such as materials, catalyst activity, operating temperature, etc. Generally speaking, the service life of the three-way catalytic converter needs to be replaced after the vehicle mileage reaches tens of thousands of kilometers. However, the specific replacement cycle needs to be determined according to the actual situation. It is recommended to refer to the vehicle's manual or consult a professional maintenance personnel.

Fault or damage: If the three-way catalytic converter fails or is damaged, such as clogging or cracking, it will affect its normal operation, resulting in reduced engine performance and increased emissions. At this time, a new three-way catalytic converter needs to be replaced.

Exceeding emissions: If the engine's emissions exceed the standard, it is likely that the three-way catalytic converter is the problem. In order to comply with emission regulations and protect the environment, the faulty three-way catalytic converter should be replaced.

Precautions for replacing three-way catalytic converter

Precautions for replacing three-way catalytic converter

Choose the right model and specification: When replacing the three-way catalytic converter, you should choose the model and specification that matches the original car to ensure its performance and life. It is recommended to purchase original accessories or accessories from well-known brands from regular channels.

Keep it clean: During the removal and installation process, the work area and parts should be kept clean to prevent impurities from entering the exhaust pipe or the inside of the three-way catalytic converter and affecting its normal operation.
Follow the correct installation sequence and torque requirements: When installing a new three-way catalytic converter, it should be tightened and fixed in the correct sequence and torque according to the manufacturer's recommendations. This helps ensure the correct installation and stable operation of the three-way catalytic converter.

Check other parts: When replacing the three-way catalytic converter, it is recommended to check other related parts (such as exhaust manifold, muffler, etc.) for damage or aging, and repair or replace them together if necessary. This helps ensure the normal operation of the entire emission control system.

Test drive and observation: After completing the replacement, a test drive should be carried out and the operation of the engine should be observed. If any abnormality (such as abnormal noise, shaking, etc.) is found, the vehicle should be stopped immediately for inspection and the problem should be dealt with.

At the same time, pay attention to the emissions of the new three-way catalytic converter to ensure that it works normally and meets the requirements of emission regulations.