The middle part of the engine structure surrounding the working parts.

2-Stroke Engine

The crankcase is a pressurization chamber to force fuel/oil/air into the cylinder. Here you mix oil and gas to lubricate internal parts.

4-Stroke Engine

The crankcase is separate from the compression chamber. This allows the use of heavy oil for lubrication.

See also: Bedplate, Crankshaft, Engine Block, Internal Combustion Engine, Open Crank Engine.

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Subjects: Engines