Oil pumps are mechanical devices used to move oil from one location to another, often within an engine or an oil reservoir. They play a crucial role in ensuring that oil circulates properly, providing lubrication to various engine components and preventing wear and tear. There are different types of oil pumps, including gear pumps, rotary pumps, and diaphragm pumps, each designed for specific applications. In vehicles, oil pumps are typically driven by the engine's crankshaft and operate continuously while the engine is running. They help maintain optimal oil pressure, which is essential for efficient engine performance. Without a functioning oil pump, an engine can suffer from inadequate lubrication, leading to overheating and potential damage.