Editing Cadillac V8 engine (section)

===331 series===
For 1949, Cadillac and [[Oldsmobile]] each produced their V8 designs (the Oldsmobile engine was the [[Oldsmobile V8 engine#303|303]]). Both of the engines were [[overhead valve]] designs, pioneered by Buick. The Cadillac 331 engine featured a "dry" (coolant exited through an assembly attached directly to the cylinder heads), open runner (requiring the use of a tappet valve cover) [[intake manifold]], rear-mounted [[distributor]], and shaft-mounted rockers. Crankshaft end play is carried by the rear bearing on the two GM engines. It has the lighter "skirtless" block where the oil pan flange does not descend appreciably below the crankshaft centerline and they both have a partial integral cast iron clutch housing that compares to the early [[Chrysler Hemi engine|Chrysler Hemi V8]] design. 1955 331 engines went to a lighter "flat back" that bolted to a clutch and flywheel housing at the front of the transmission.

Bore and stroke are {{cvt|3+13/16|x|3+5/8|in|mm|1}} for an overall displacement of {{cvt|5425|cc|cuin L|1|order=out}}. This engine features an oiling system which uses a central cast-in passage between the lifter galleries feeding oil to the cam and crank by grooves machined into the cam bores. A single drilled passage per bearing saddle feeds both cam and crank journals. Shared with the Oldsmobile Rocket V8 is how the lifters are supplied oil through small "bleeds" instead of placing the lifters directly into the right and left side oil supply galleries. Many early racers would replace the Cadillac hydraulic lifter and rocker assemblies with the solid lifters and adjustable rockers from the Studebaker V8 for operation at higher engine speeds.

====365====
Displacement was increased to {{cvt|365|cuin|L|1}} for 1956 by increasing the bore to {{convert|4|in|mm|1}} while maintaining the {{cvt|3+5/8|in|mm|1}} stroke. For the three years that the 365 was made, the base versions had a single four-barrel carburetor. The 1956 version produced 285 horsepower. The 1957 version raised that base engine output to 300 horsepower, while the 1958 base version cranked out 310. Eldorados featured multi-carb engines in all 3 years. The Eldorado engines were also optional on all other Cadillacs. The 1958 Eldorado 3-2bbl version produced {{cvt|335|hp|kW|0}}.

====390====
A longer, {{cvt|3+7/8|in|mm|1}} stroke pushed displacement to {{cvt|6384|cc|cuin L|1|order=out}} for 1959, yielding {{cvt|325|hp|kW|0}}, while the Eldorado Tri-power reached {{cvt|345|hp|kW|0}}.