Is there a bad effect on cleaning the drain holes yourself?

There is no adverse effect.

Once the water hole is blocked, there will be water leakage and water seepage in the car, which can damage the interior panel, and at worst cause damage to the mechanical components and engine circuit system.

1. Skylight drainage holes.

The sunroof drains are located at each of the four corners of the sunroof, which is easy to see when the sunroof is opened, and there are four small holes, each of which is connected to a hose that leads to the front and back of the car. If the drainage holes in the four corners are blocked, the water cannot be discharged smoothly, and it will seep into the interior, and in severe cases, the water will flow along the roof to the sunroof motor in the car, and once the power is on, the sunroof motor will often be short-circuited and burned.

Cleaning method: The initial blockage of the sunroof drainage hole will be at the entrance of the drainage hole, and you can see it when you open the skylight. After a long time, you may enter the drainage hose and go inside along the drainage hose, which is not easy to dredge at this time, it is best to go to the 4S shop and dredge it by a professional master.

2. Engine compartment drainage holes.

The engine compartment drain hole is at the rear of the engine compartment, on the lower edge of the windshield, at the air conditioning intake. Because the engine compartment has many parts and less cleaning, the drainage holes are designed to be wide and easier for debris to enter. Because it is very close to the air conditioning intake, bacteria can easily breed in the stuffy cabin, and affect the air quality in the car through the air filter element, and in severe cases, it will also flow into the car along the air conditioning intake, resulting in water accumulation on the floor.

Cleaning method: Dredging requires removing the upper cover, which is slightly more complicated.

3. Door drain holes.

The door drain hole is located in the lower part of the door panel, and there are generally 1-2 of them. Most of the drain holes under the door panel are not drained by a hose, and rainwater flows directly through the anti-rust treatment of the door panel. Due to the low location of the drainage hole, the vehicle driving on the muddy road for a long time, the drainage hole is easy to be sealed by silt, the owner should pay attention to check, once the door drainage hole is blocked, the remaining water in the door panel will cause damage to the window regulator, audio and central control door lock.

Not cleaning the drain hole yourself won't have any adverse effects unless you use too much force.

It doesn't matter, the exhaust hole can be cleaned by itself.

If you have a drain hole, you can clean it yourself.

Yes, my own methods are not professional enough, and I will not clean up.

If it is cleaned well, it will not affect the drainage holes.

If you are proficient, you can handle it yourself.

If you don't know how to do it, it will definitely have an impact.

It generally doesn't have much of an impact.

No, the drainage hole is a small part, not a big problem.