Editing Automobile engine replacement (section)

==Long block==
[[File:Oldsmobile 400cu-in big block engine.jpg|thumb|right|[[Oldsmobile V8 engine#400|Oldsmobile 400 V-8]] as a long block with crankshaft, cylinder head, camshaft, and valve train installed.]]
A '''long block''' is an [[engine]] sub-assembly that consists of the assembled [[short block]] with [[crankshaft]], [[cylinder head]], [[camshaft]] (usually), and [[valve train]].<ref name=MT-2020/> A long block does not include the fuel system, electrical, intake, and exhaust components, as well as other components. A long block may include the balancer/damper, timing cover, oil pan and valve covers.<ref name=MT-2020/>

A long block engine replacement typically requires swapping out parts from the original engine to the long block. These parts can include the [[oil pan]], [[timing cover]], [[valve covers]], [[intake manifold]], emission-control parts, [[carburetor]] or [[fuel injection]] system, the [[exhaust manifold|exhaust manifold(s)]], [[Alternator (auto)|alternator]], [[Starter (engine)|starter]], [[power steering]] pump (if any), and [[Air conditioning#Automobile air conditioners|air conditioner]] [[Gas compressor|compressor]] (if any).