<P> In the basic terms of machine elements , the various main parts of an engine ( such as cylinder ( s ) , cylinder head ( s ) , coolant passages , intake and exhaust passages , and crankcase ) are conceptually distinct , and these items can all be made as discrete pieces that are bolted together . Such construction was very widespread in the early decades of the commercialization of internal combustion engines ( 1880s to 1920s ) , and it is still sometimes used in certain applications where it remains advantageous ( especially very large engines , but also some small engines ) . However , it is no longer the normal way of building most petrol engines and diesel engines , because for any given engine configuration , there are more efficient ways of designing for manufacture ( and also for maintenance and repair ) . These generally involve integrating multiple machine elements into one discrete part , and doing the making ( such as casting , stamping , and machining ) for multiple elements in one setup with one machine coordinate system ( of a machine tool or other piece of manufacturing machinery ) . This yields lower unit cost of production ( and / or maintenance and repair ) . </P>
<P> In the basic terms of machine elements , the various main parts of an engine ( such as cylinder ( s ) , cylinder head ( s ) , coolant passages , intake and exhaust passages , and crankcase ) are conceptually distinct , and these items can all be made as discrete pieces that are bolted together . Such construction was very widespread in the early decades of the commercialization of internal combustion engines ( 1880s to 1920s ) , and it is still sometimes used in certain applications where it remains advantageous ( especially very large engines , but also some small engines ) . However , it is no longer the normal way of building most petrol engines and diesel engines , because for any given engine configuration , there are more efficient ways of designing for manufacture ( and also for maintenance and repair ) . These generally involve integrating multiple machine elements into one discrete part , and doing the making ( such as casting , stamping , and machining ) for multiple elements in one setup with one machine coordinate system ( of a machine tool or other piece of manufacturing machinery ) . This yields lower unit cost of production ( and / or maintenance and repair ) . </P>
where is the engine block located in a car
where is the engine block located in a car
cylinder head ( s ) coolant passages intake and exhaust passages crankcase
cylinder head ( s ) coolant passages intake and exhaust passages crankcase