a heat engine in which combustion occurs inside the engine rather than in a separate furnace; heat expands a gas that either moves a piston or turns a gas turbine

housing for a crankshaft

a rotating shaft driven by (or driving) a crank

a metal casting containing the cylinders and cooling ducts of an engine

mechanical device that has a plunging or thrusting motion

an internal combustion engine with valves placed in the engine block beside the piston, instead of in the cylinder head, as in an overhead valve engine.

An overhead valve engine (OHV engine) is an engine in which the valves are placed over the cylinder head.

housing for a crankshaft

a rotating shaft driven by (or driving) a crank

a metal casting containing the cylinders and cooling ducts of an engine

mechanical device that has a plunging or thrusting motion