The main function of the oil pan screw is to fix on the oil pan and release the lubricating oil in the engine. The gasket of the screw plays a sealing role by squeezing, preventing loosening and falling off caused by vibration, ensuring the normal flow of lubricating oil and replacement . In addition, the design and material choice of oil pan screws also affect their service life and sealing performance. For example, plastic oil pans and plastic drain screws need to be replaced every time, while metal oil pans and metal drain screws only need to be replaced with gaskets
When replacing the oil, it is usually necessary to unscrew the oil drain screw of the oil pan to discharge the old oil. For plastic oil pan and plastic oil drain screws, due to easy deformation and aging, need to be replaced together with the oil drain screws . For the metal oil pan and metal oil release screws, only need to replace the gasket, because the metal screw strength is large, not easy to wear, and the gasket deformation under pressure, to achieve sealing
