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crankcase

American  
[krangk-keys] / ˈkræŋkˌkeɪs /

noun

crankcases plural
  1. (in an internal-combustion engine) the housing that encloses the crankshaft, connecting rods, and allied parts.


crankcase British  
/ ˈkræŋkˌkeɪs /

noun

  1. the metal housing that encloses the crankshaft, connecting rods, etc, in an internal-combustion engine, reciprocating pump, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of crankcase

First recorded in 1875–80; crank 1 + case 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

For your mechanic’s future reference, the fuel pump is now inside the crankcase, being driven by the engine balance shaft.

From The Wall Street Journal Feb. 12, 2026

Any methane left in the engine crankcase and fuel lines is automatically flushed into the atmosphere - and CalMac has yet to establish how much will be released.

From BBC Dec. 30, 2024

The air here smells like crankcase oil — as it has for decades — but there is far less activity now than there was just three years ago, and local communities are feeling the pinch.

From Los Angeles Times Mar. 17, 2022

One, the Polar Sea, has been idle since a 2010 crankcase explosion.

From Seattle Times Aug. 25, 2020

There were gummy stains on it, too, like crankcase drainings or old strawberry jam.

From "Slaughterhouse-Five" by Kurt Vonnegut

The town was a sleepy German farm community when Horace and John Dodge built a plant to supply Ford with axles, transmissions, steering gears and crankcases.

From Time Magazine Archive

The waste, which runs to 1.1 billion gallons, is the glop that is drained from industrial machinery, buses, trucks and the crankcases of cars at every oil change.

From Time Magazine Archive

Motorists have the stuff poured into the crankcases of their cars, separate from the oil itself.

From Time Magazine Archive

Hot oil from airplane crankcases is usually forced into air-bathed tubes for cooling.

From Time Magazine Archive

The use of aluminum was not entirely novel at this time, as it had been utilized in many automobile engine parts, particularly crankcases; but its incorporation in this rather uncommon combination represented a bold step.

From The Wright Brothers' Engines and Their Design by Hobbs, Leonard S.

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