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The crankcase is the housing for a crankshaft, a crucial component in engines. In an automobile engine, the crankcase is formed by the lower part of the cylinder block and the oil pan, which also serves as a reservoir for lubricating oil. This structure provides the framework for the engine and includes mounting points for attachment to the vehicle's chassis. For larger stationary or marine engines, the crankcase may be divided into upper and lower sections, separate from the cylinder assemblies. The design and configuration of the crankcase, along with the cylinder block, are integral to the overall engine construction and function.12

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