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A camless or free-valve piston engine is an engine that has poppet valves operated by means of electromagnetic, hydraulic, or pneumatic [1] actuators instead of conventional cams. Actuators can be used to both open and close valves, or to open valves closed by springs or other means.
LS3 can also refer to a 402 cu in (6.6 L) Chevrolet Big-Block engine of the 1970s. GM LS3 engine in a 2008 Chevrolet Corvette. The LS3 was introduced as the Corvette's new base engine for the 2008 model year. It produces 430 bhp (321 kW; 436 PS) at 5900 rpm and 424 lb⋅ft (575 N⋅m) at 4600 rpm without the optional Corvette exhaust and is SAE ...
Racing-spec cam, high-flow aluminum heads (casting #s varied by model year) and some upgraded, competition-grade parts: 12.50:1 [b] 430 hp (321 kW) [c] 1969: 1969: ZL1: Aluminum block with open chamber "3946074" aluminum heads (the early Corvette RPO engine featured a closed chamber head); cam even "hotter" than L88's; upgraded parts similar to ...
The biggest change is the addition of the larger, more powerful 6.2-litre 304 kW (408 hp) and 570 N⋅m (420 lb⋅ft), LS3 V8 engine across all current V8 models of the Commodore, Calais, Caprice and Ute. A Bimodal exhaust was fitted standard to the SS, SS V and Redline models and was optional on Calais V when the LS3 V8 was fitted.
It uses Sequential fuel injection, has roller tappets and features forged steel connecting rods, a one-piece cast camshaft, and either a cast aluminum or reinforced plastic intake manifold. The 3.3 has a timing chain, and is an interference engine meaning that the valves will collide with the pistons in the event of a timing chain failure.
This sensor is one of the two most important sensors in modern-day engines, together with the camshaft position sensor. As the fuel injection (diesel engines) or spark ignition (petrol engines) is usually timed from the crank sensor position signal, failing sensor will cause an engine not to start or will cut out while running.
[5] [6] Replacement of the engine's water pump at the same time is often recommended, since the water pump is also subject to wear and easily accessed during the replacement of the timing belt. Timing belts are typically located in front of the engine and are often behind a cover for protection against dust and debris.
The SS features the 6.2 L (376 cu in) LS3 V8 producing 426 hp (318 kW; 432 PS) and is paired with a 6-speed manual. The automatic SS has the L99 V8 rated at 400 hp (298 kW; 406 PS). The RS appearance package available on the LT and SS featured 20-inch wheels with a darker gray tone, halo rings around xenon headlamps, a unique spoiler, and red ...