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The High Value engine family from General Motors is a group of cam-in-block or overhead valve V6 engines.These engines feature cast iron blocks and aluminum heads, and use the same 60° vee bank as the 60° V6 family they are based on, but the new 99 mm (3.90 in) bore required offsetting the bores by 1.5 mm (0.059 in) away from the engine center line.
The LQ1 (also called the Twin Dual Cam or TDC) was a 3.4 L (3,350 cc) DOHC V6 engine ("X-code") based on the aluminum-headed second generation of GM's 60° engine line, sharing a similar block with its pushrod cousins, the 3.1 L LH0 V6 and the then recently retired 2.8 L (2,837 cc) LB6 V6.
The 3.2 L; 193.8 cu in (3,175 cc) LA3 or Y32SE is a complete redesign of the L81 for the Cadillac CTS and Opel Omega B. [citation needed] It had fixed (non-variable) valve timing, and a variable length intake manifold. The engine has a 87.5 mm × 88 mm (3.44 in × 3.46 in) bore and stroke with a 10.0:1 compression ratio.
The GM High Feature engine (also known as the HFV6, and including the 3600 LY7 and derivative LP1) is a family of modern DOHC V6 engines produced by General Motors.The series was introduced in 2004 with the Cadillac CTS and the Holden Commodore (VZ).
The Chevrolet 90° V6 family of V6 engines began in 1978 with the Chevrolet 200 cu in (3.3 L) as the base engine for the all new 1978 Chevrolet Malibu.The original engine family was phased out in early 2014, with its final use as the 4.3 L (262 cu in) V6 engine used in Chevrolet and GMC trucks and vans.
The original design of the cam-in-head engine was done by General Motors in Detroit, Michigan. [1] Although the camshaft is in the cylinder head, the CIH is not a true overhead camshaft design. Rather it can be thought of as a cam-in-block engine with a greatly shortened valve drivetrain. The camshaft is driven by a roller chain.
A timing mark is an indicator used for setting the timing of the ignition system of an engine, typically found on the crankshaft pulley (as pictured) or the flywheel. [1] These have the largest radius rotating at crankshaft speed and therefore are the place where marks at one degree intervals will be farthest apart.
It also features higher flowing cylinder heads sourced from the L92, a more aggressive camshaft with 0.551 in (14 mm) lift, a 10.7:1 compression ratio, a revised valvetrain with 0.236 in (6 mm) offset intake rocker arms, a high-flow intake manifold, and 47 lb (21 kg)/hour fuel injectors from the LS7 engine.