Editing Buick V8 engine (section)

{{Infobox engine
| name          = Buick V8 engines
| image         = 1964 Buick Wildcat 445 engine (401ci Nailhead).jpg
| caption       = 401 cu in "Nailhead" in a 1964 Buick Wildcat
| manufacturer  = [[Buick]] ([[General Motors]])
| aka           = ''Fireball V8''<br />(nickname)<br />''Nailhead'' (1953–1966) 
| production    = {{Start date|1953}}–{{end date|1981}} [[Buick City]]<br />(engine block and heads)<br />[[Saginaw Metal Casting Operations]]
| predecessor   = [[Buick Straight-8 engine|Buick straight-eight]]
| successor     = {{ubl | [[GM LT engine]] |[[GM LS engine]] }}
| configuration = 90º [[V8 engine|V8]]
| displacement  = {{cvt|215-455|cuin|L|1}}
| bore          = {{cvt|3.5|-|4.31|in|1}}
| stroke        = {{cvt|2.8|-|3.9|in|1}}
| block         = Cast iron, Aluminum
| head          = Cast iron, Aluminum
| valvetrain    = [[Overhead valve engine|OHV]] 2 valves x cyl.
| compression   = 8.8:1&ndash;11.0:1
| turbocharger  = In [[Oldsmobile Cutlass#1962|1962-63 Oldsmobile Cutlass]] only
| fuelsystem    = [[Carter Carburetor|Carter AFB]] or [[Rochester Products Division|Rochester]] [[carburetor]]s
| fueltype      = Gasoline
| oilsystem     = 
| coolingsystem = [[Radiator (engine cooling)|Water-cooled]]
| idle          =
| redline       =
| power         = {{cvt|150-360|hp|kW|0}}
| specpower     = 
| torque        = {{cvt|220-510|lbft|Nm|0}}
| length        = 
| width         = 
| height        = 
| weight        = {{cvt|318-467|lb|kg}}
}}

The '''Buick V8''' is a family of [[V8 engine]]s produced by the [[Buick]] division of [[General Motors Corporation|General Motors (GM)]] between 1953 and 1981. All were [[V8 engine#V-angle|90°]] water-cooled V8 [[Overhead valve|OHV]] [[pushrod engine]]s, and all were [[naturally aspirated]] except one [[Turbocharger|turbocharged]] version of the 215.

The Buick V8 family can be divided into two sizes, big-blocks and small-blocks ([[V8 engine#Size, layout, and classification|block size classification]] refers to the [[engine block]]'s [[Bore (engine)#Bore pitch|bore spacing]] and external dimensions, not [[engine displacement|displacement]]). All 1953–1966 Buick V8s and the 1967–1976 "big-block" engines shared a {{cvt|4.75|in}} bore spacing. The small-block was produced from 1961 to 1981.

Some Buick V8s, such as the 350, 400, and 455, have the same displacements as [[List of GM engines#Divisions|V8s of other GM divisions]], but they are entirely different designs. Buick Nailhead V8s can be distinguished by the top surfaces of their [[valve cover]]s being [[Vertical and horizontal|horizontal]] ([[Parallel (geometry)|parallel]] to the ground). Later Buick small and big block V8s have a front-mounted [[distributor]] tilted to the drivers side (like [[Cadillac]]s), but siamesed center exhaust ports (unlike Cadillacs).