What is a crankcase?

A crankcase is an enclosed part of an internal combustion engine that houses the crankshaft, which converts the up-and-down motion of the pistons into rotational motion. The crankcase also serves as a reservoir for engine oil that lubricates moving parts and helps dissipate heat. Additionally, the crankcase often contains ventilation systems to prevent the buildup of harmful gases and pressure within the engine.

Crankcases can be made from a variety of materials, including aluminum, steel, and cast iron, depending on the specific design and requirements of the engine. They are typically sealed to prevent oil leaks and to maintain proper pressure levels within the engine. Regular maintenance and inspection of the crankcase are essential to ensure the optimal performance and longevity of the engine.