The oil drain plug bolt is a key component located at the lowest point of the oil pan in an engine. It features a threaded shaft that screws into the oil pan, secured with a washer or gasket to create a tight seal. During an oil change, the bolt is loosened to allow used engine oil to drain out into a collection pan below the vehicle. Careful tightening after draining is essential to prevent leaks. Regular maintenance includes checking and, if necessary, replacing the bolt and its sealing components to ensure effective sealing and prevent oil leaks. This straightforward mechanism is critical for the proper maintenance and longevity of an engine by facilitating the removal and replacement of engine oil during routine service intervals.
The oil drain plug bolt is typically machined by turning the main body and threading, ensuring precise dimensions and threading alignment. Thread cutting methods like single-point threading or tapping are employed to create the threads. Milling may be used for shaping the bolt head, while drilling provides holes for additional features. Surface treatments like corrosion-resistant coatings may be applied for durability. These methods ensure the bolt meets exact specifications, providing a secure seal and facilitating straightforward maintenance during oil changes.