The Engine Oil Expansion Tank is an oil reservoir or oil catch can, is a component in an engine's lubrication system. It collect excess engine oil vapors and preventing them from re-entering the engine's intake system. It is constructed from durable materials, the expansion tank is connected to the engine's crankcase ventilation system, helping to maintain optimal oil levels and reduce the risk of oil contamination.Attributes:• Prevent oil from entering the intake manifold.• Resists wear and corrosion, contributing to long-term reliability.• Improve engine efficiency and reduce oil consumption.Applications: The Engine Oil Expansion Tank is used to preventing oil contamination in the intake system and returning separated oil to the engine's crankcase.