Note: Do not try to start or turn the engine after the car is soaked in water, otherwise it will cause serious deformation of the engine connecting rod; check the electronic control system inside the car, and then check the interior of the vehicle such as carpets, The treatment of seats and other materials that have been soaked for too long, resulting in material deformation, roughness, odor, and bacterial growth. Inspection method: 1. Open the hood and check whether there is sludge in the water tank, air-conditioning radiator, and front panel of the water tank (viewed from below). 2. Check the small parts next to the engine, the charging motor, the starter motor, the wire socket, and the sludge at the seams of the left and right wheel tortoises. 3. Inspect the front and rear seat seats (turned upside down) to check for residual sludge and musty smell on the springs and inner brown cloth. 4. Check the sludge remaining in the dead corners of the hidden joints of the rear wheel turtles on both sides of the rear trunk seat (spare tire seat). 5. Residual sludge can be removed from the structure, wires, and socket connectors in the dashboard seat. 6. There is an obvious line of sludge on the "center pillar" (covered by a plastic trim panel) in the middle of the front and rear doors, indicating the height of the car's water exposure (it is difficult to clean because there are too many dead joints in the pillar). 7. Use a screwdriver to dig out the front and rear windshield rubber (from inside the car). If there is sludge inside, the car is completely soaked. If the water level exceeds the hood, the car is completely soaked (topped off). The mixed rainwater is very corrosive and will affect the function of electrical appliances, especially their future use. Because most cars are equipped with electronic control systems (such as engine ECU, ABS system, SRS system, GPS satellite navigation, etc.), if water enters, it will cause a short circuit on the IC circuit board inside the computer ECU and cause rust spots on the plug terminals, which will gradually It will corrode the metal parts and cause poor contact in the circuit. In severe cases, it may even cause short circuit and burnout. After the car is soaked in water, do not try to start or rotate the engine, otherwise the engine connecting rod will be severely deformed. Moreover, the consequence of forcibly starting the engine is that the insurance company will often refuse to pay compensation. Therefore, it should be towed to the repair shop as soon as possible for disassembly and cleaning. To dispose of the engine, all the spark plugs of the vehicle need to be disassembled, and finally a cylinder pressure test is performed. Usually the cylinder pressure of a gasoline engine is in the range of 900kPa to 1100kPa. If the cylinder pressure difference is too large, the engine needs to be disassembled for inspection. Thirdly, the materials inside the vehicle, such as carpets and seats, are deformed, rough and smelly due to being soaked for too long, causing bacteria to breed. There is a lot of moisture on the wire bundle under the carpet, and the moisture in the circuit causes short circuits in the wires. It is best to replace these soaked items, otherwise it will cause sequelae of water soaking. There is usually sound insulation cotton inside the door trim, which usually needs to be replaced. Speakers must be replaced after they are soaked in water, otherwise they will break down in a few days. The four-wheel bearings must be replaced, because the bearing seals are the best-selling lubricating oil. If not replaced, the oil will be corroded and deteriorate, and it will no longer provide lubrication, affecting driving safety. First, there will be abnormal noise, and finally it may break.