crankcase

English Thesaurus

1. housing for a crankshaft (noun.artifact)

hypernym	:	housing,
definition	:	a protective cover designed to contain or support a mechanical component (noun.artifact)

part meronym	:	reciprocating engine,
definition	:	an internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders (noun.artifact)