What should I do if there is air leakage at the interface between the old Jetta three way catalytic

Hello, in this case, if there is no deformation or corrosion and rust at the interface between the three-way catalytic converter and the exhaust pipe, the air leakage can be eliminated by replacing the interface pad repair.

Hello owner, Jetta car has a cushion at the interface between the three-way catalytic converter and the exhaust pipe, and the air leakage may be because the mat is broken, and the problem should be solved by going to the repair shop to replace it!

Air leakage will affect the normal operation of the sensor, and the air leakage is generally caused by the poor sealing of the interface pad between the pipelines.

Hello, the problem you mentioned is mainly the exhaust pipe route, it is recommended to go to the four S shop and repair shop, and add a sealing mouth gasket.

Check if the screws are loose first? Check the lower middle gasket for damage. If the gasket is damaged and needs to be replaced, check that the flat surface of your exhaust pipe is not worn?

In this case, it is generally necessary to go to the maintenance plant to check and replace the three-way catalytic converter, and the cost is generally about 2,000 yuan.

Hello, this problem needs to be disassembled, whether the gasket at the junction of the three-way catalytic converter and the exhaust pipe is seriously damaged and can be replaced.

Hello. If this leaks, then it needs to be repaired and maintained. We also have a turbocharger installed in this place.

If it is a three-way catalytic converter or an exhaust pipe interface that is deformed and rusted. Specifically, you can check the replacement.

If the car exhaust pipe is leaking, you can try to replace the interface pad first, because the air leak may be caused by the aging of the interface pad. However, when it doesn't work after changing several interface pads, it needs to be double-checked.

It was found that the interface of the front exhaust pipe (exhaust manifold) had been deformed, and some small pits had appeared convex and concave. If the entire exhaust manifold is replaced, not only is it expensive to repair and the delay is long, but it is often necessary to replace the intake and exhaust manifold gaskets. In order to save costs for the owner and solve the problem as soon as possible, the method of winding copper wire at the interface can be used in maintenance to plug the loophole of the exhaust pipe and eliminate the abnormal noise of the engine when running.

A section of copper wire is cut from the old cable and wound around the interface pad, like a hand-woven straw hat in the past. The inner ring is a little tighter, and the outer ring is a little larger and thicker than the interface pad. After installation, tighten the exhaust pipe bolts when the car is warm, and the abnormal noise of the exhaust pipe will be completely eliminated.

By using copper wire to connect with the interface pad, the exhaust pipe interface pad can be tightened at high temperature when the car is hot, which makes up for the loophole of the exhaust manifold, fills the gap of the exhaust manifold, and greatly improves the sealing performance of the interface. In this way, there are many ways to join other items and seals in order to improve sealing performance. For example:

In order to prevent oil leakage of the oil seal, wrap cotton thread or viscose at the interface; In order to prevent fluorine leakage from the air conditioner, wrap elastic tape around the end of the interface nut; In order to prevent oil leakage from the valve chamber cover, a film is applied to the upper end of the cylinder head.

1. The previous pipeline was blocked by waste pollutants, but now it is unblocked, so the sound will become louder.

2. The exhaust gas is due to the fact that after replacing the new components, the amount of ECU changes in the process of matching fuel injection is not very obvious, and the taste can be eliminated after using it for a period of time.