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The Chevrolet small-block engine is a series of gasoline-powered V8 automobile engines, produced by the Chevrolet division of General Motors in two overlapping generations between 1954 and 2003, using the same basic engine block. Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the ...
This was so named because it began with Chevrolet's V8 engines. Chevrolet big-block V8s; Chevrolet small-block V8s; GM Vortec 4300 90° V6; GM Iron Duke RWD inline 4 (early RWD Variants, later versions may use a FWD pattern, and have two possible starter locations) Jeep with GM Iron Duke inline 4 2.5L/151 in 3 (1980-1983).
A short block is an engine sub-assembly comprising the portion of the cylinder block below the head gasket but above the oil pan, [4] which usually includes the assembled engine block, crankshaft, connecting rods, and pistons with piston rings properly installed. [5] An in-block cam engine short block includes the camshaft, timing gear, and any ...
The big-block engines initially used a forged crankshaft with a stroke of 3.975" for the 1965-1967 425 and 400 CID versions; starting in 1968, both the 400 cu in (6.6 L) and the 455 cu in (7.5 L) big blocks used a stroke of 4.25 in (108 mm), with crankshaft material changed to cast iron except in a few rare cases.
Effectively, production Pontiac V8 blocks were externally the same size (326-455) sharing the same connecting rod length 6.625 in (168.3 mm) and journal size of 2.249" (except for the later short deck 301 and 265 produced in the late 1970s and early 1980s before Pontiac adopted universal GM engines).
General Motors has produced three different engines called LT1: 1970–1972 LT-1 – Chevrolet Generation I Small-Block; 1992–1997 LT1 – GM Generation II Small-Block; 2013–(current) LT1 - GM Generation V Small-Block.
The standard engine for the C3500HD was the 5.7 L V8 with the 7.4 L V8 as an option; the 6.5 L turbodiesel was introduced as an option for 1992. [12] The engines were paired to the 4L80E 4-speed OD automatic and the NV4500 5-speed manual transmissions, the latter being the sole transmission option for the 5.7 L V8.
These bore and stroke dimensions were later used by the 267 cu in (4.4 L) V8 Chevrolet engine. Also like the small block V8 engines, the 200 cu in (3.3 L) V6 used 2.45-inch (62.2 mm) main bearings and 2.1-inch (53.3 mm) rod bearing diameters. Being a 90° V6, Chevrolet took steps to eliminate the rough running tendencies of the 200.
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