1964-1990 Oldsmobile V8 engine information

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The big and small block engine types are almost identical, with the big block having about a one inch higher deck than the small block. The bore centers are the same, the only differences between the small-block and big-block Olds blocks are the deck height (9.33" and 10.625", respectively) and the main journal size (2.5" and 3.0", respectively); the diesel 350 used the BB size mains, however. All small blocks have a 3.385" stroke; the displacement varied by increasing the bore size.  
 
The big and small block engine types are almost identical, with the big block having about a one inch higher deck than the small block. The bore centers are the same, the only differences between the small-block and big-block Olds blocks are the deck height (9.33" and 10.625", respectively) and the main journal size (2.5" and 3.0", respectively); the diesel 350 used the BB size mains, however. All small blocks have a 3.385" stroke; the displacement varied by increasing the bore size.  
  
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==Parts interchangeability==
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Hi,
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Many internal parts interchange: flexplate and flywheel, engine mounts, oil pan, front cover, water pump, bellhousing (also interchanges with modern Cadillac, Buick and Pontiac), oil pump and pump driveshaft, rocker arms and fulcrum (except early 330), cam and lifters, harmonic balancer, cam bearings, timing chains and timing gears. Heads will basically interchange, except manifold ports may not align. Early engines used both 39 degree and 45 degree lifter angles along with two different lifter diameters. Because of these differences, cams and lifters will not exchange between engines with different angles and lifter diameters, obviously. In 1980 push rods were changed to a larger diameter tip, from 5/16" to 3/8". Because of this changes were needed to the rocker arms and lifter cups.
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==Engine names==
 
==Engine names==

Revision as of 01:22, 27 June 2019

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