A cylinder block is an integrated structure comprising the cylinder(s) of a reciprocating engine and often some or all of their associated surrounding structures (coolant passages, intake and exhaust passages and ports, and crankcase). The term engine block is often used synonymously with `cylinder block` (although technically distinctions can b.....
casting attached to crankcase which contains cylinder bore, cooling fins or water jacket, and provides a means of mounting cylinder head.
The basic part of the engine to which other engine parts are attached. It is usually a casting and includes engine cylinders and the upper part of the crankcase. 
The main part of the engine to which other parts are attached.
the metal casting in which the cylinders of an internal-combustion engine are bored. Also called