The main function of the oil drain screw of the oil pan is to release the old oil when replacing the oil, and to play a sealing role after replacing the new oil.The integrity of the oil drain screw is crucial to the effect of oil replacement and the normal operation of the engine.
The working principle of automotive oil pan drain screws is based on a simple mechanical design, usually consisting of a plug and nut. One end of the screw plug is connected with the oil pan, and the other end has a screw hole, and a sealing gasket is provided inside the screw hole. When the oil needs to be replaced, just screw the nut out of the screw hole, so that the sealing gasket is opened, and the oil flows out of the screw hole. After the oil has been drained, the plug needs to be re-installed on the oil pan to complete the replacement process.
