What to Do When a Car's Drainage Hole is Clogged?

[DelCody]

Here are the specific situations: 1. Sunroof Drainage Hole: If the sunroof drainage hole is clogged, it can easily cause water to accumulate and flow along the roof to the sunroof motor inside the car. Once powered on, the sunroof motor may short-circuit or even burn out. The initial clogging of the sunroof drainage hole usually occurs at the entrance, which can be seen by opening the sunroof. At this stage, it is relatively easy to clean and can be done by yourself. 2. Engine Compartment Drainage Hole: Since the engine compartment is very close to the air conditioning intake, bacteria can easily grow in the stuffy compartment and affect the air quality inside the car through the air filter. In severe cases, water may flow into the car through the air conditioning intake, causing floor water accumulation. To unclog the engine compartment drainage hole, the upper cover plate needs to be removed for inspection. 3. Door Drainage Hole: Due to the low position of the door drainage hole, vehicles that frequently drive on muddy roads may have their drainage holes blocked by mud. Once the door drainage hole is clogged, water trapped inside the door panel can damage the window regulator, audio system, and central door lock. To clean the door drainage hole, a hard object like an iron wire can be used to unclog it. 4. Fuel Tank Cap Drainage Hole: Since the vehicle is used outdoors, sand and dust can accumulate around the fuel tank cap through the gaps. If this drainage hole is clogged, water may enter the fuel tank during car washing or rainy weather, causing damage to the fuel tank. To clean the fuel tank cap drainage hole, a high-pressure air gun or a hard object like an iron wire can be used. 5. Air Conditioning Drainage Hole: During the cooling process of the car's air conditioning, condensation water is produced, and the condensation water pipe is located under the chassis. During the rainy season, mud and water accumulation can also clog the drainage hole. The consequences are similar to those of the engine compartment drainage hole clogging, where water may flow back into the car, causing floor water accumulation. To clean the air conditioning drainage hole, a thin iron wire can be used to unclog it. 6. Trunk Drainage Hole: The spare tire area in the trunk is one of the lowest positions in the car body. If the vehicle wades through high water or water seeps in through the gaps in the headlights, water will flow to this position inside the car body. Since the drainage hole is rarely used and there is a high chance of rainwater flowing back into the car, most manufacturers seal the drainage hole. It can be unscrewed for cleaning or use when needed.