What's the matter if there is no drain hole in the exhaust pipe?

[JohnnyDella]

Exhaust pipe without drain hole may be because the car itself is not designed with a drain hole. Water accumulation in exhaust pipe: Water entering the exhaust pipe can cause impurities in the water to block the three-way catalytic converter or damage the oxygen sensor, which may lead to exhaust blockage. Poor exhaust flow can cause the engine to stall. Treatment methods: Replace the exhaust pipe. Some models have design defects, and the drainage position of the exhaust pipe is unreasonable; Drill a hole in the exhaust pipe, drill a hole at the lowest point of the lower wall of the exhaust tail section to let the water drain; Drive the car to a slope with the rear end facing downward, step on the accelerator to drain the water; When you hear a gurgling sound of water in the exhaust at idle, you can also stop the car on flat ground and step on the accelerator several times to drain the water; If the exhaust pipe needs to be disassembled, the exhaust gasket at the corresponding interface needs to be replaced; If vehicle resonance is found, it may be caused by damage to the exhaust pipe fixing hanger, which needs to be replaced when necessary.