The Engine Oil Filler Cap is positioned at the side of engine block. It encloses the oil filler, safeguarding it from contaminants, and debris, and It consists of a main cap body, a gasket for sealing, a retainer to secure the filler in place, and a ring retainer to hold the gasket in position.Attributes:• Helps stabilize oil temperature by minimizing heat exchange with the external environment• Provides an airtight seal, preventing oil leaksApplications: The Engine Oil Filler Cap seals the engine oil filler tube, preventing oil leaks and makes sure external contaminants are not entering the engine oil tank or pan.