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This engine used cast-iron cylinder liners and a cast-iron head. The cylinder heads for the two types of block (aluminum and cast iron) have similar designs but are not interchangeable. The cylinder head for the aluminum block is roughly 1/8" wider than that for the cast-iron block and uses a slightly different head bolt pattern. [9]
The Vulcan's block and cylinder heads are of cast iron, with a 60° angle between cylinder banks. It has a single cam-in-block and two overhead valves per cylinder operated by pushrods and rocker arms. Bore and stroke measurements are 89 mm × 80 mm (3.504 in × 3.150 in), for a total displacement of 2,986.14 cc (182.23 cu in).
The block has cast iron main caps and a cast iron crankshaft. The engine's cylinder head is cast iron for lower cost, structural integrity and longer camshaft bearing life. The valvetrain features a direct-acting single overhead camshaft design. [1] The engine block and cylinder heads were cast at Massena Castings Plant in Massena, New York.
All engines have cast iron blocks and cylinder heads. The engines are based on the Chevrolet Small-Block engine, and the V6 is formed by the removal of the #3 and #6 cylinders. The V6s share the same 4.4-inch (110 mm) bore spacing and 9.025-inch (229.2 mm) deck height as the V8 engines.
It has a cast iron engine block, and aluminium DOHC cylinder heads. The 5VZ-FE uses sequential multi-port fuel injection , has four valves per cylinder with shim-over-bucket tappets and features large cast connecting rods, one-piece cast camshafts, a cast crank (unlike the 3VZ-FE, which was forged) and a cast aluminium intake manifold.
Every single engine was also fitted with aluminum cylinder heads, [2] except for the 1999 and 2000 model year of the LQ4, which were cast iron. [36] Other modifications to the cylinder heads included a redesign to include significantly better airflow, with evenly spaced exhaust and intake valves.
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