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  2. Rocker arm - Wikipedia

    en.wikipedia.org/wiki/Rocker_arm

    Some OHC engines employ short rocker arms, also known as fingers, in which the cam lobe pushes down (rather than up) on the rocker arm to open the valve. On this type of rocker arm, the fulcrum is at the end rather than the middle, while the cam acts on the middle of the arm. The opposite end opens the valve. These types of rocker arms are ...

  3. GM High Value engine - Wikipedia

    en.wikipedia.org/wiki/GM_High_Value_engine

    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.

  4. GM Ecotec engine - Wikipedia

    en.wikipedia.org/wiki/GM_Ecotec_engine

    The GM Ecotec engine, also known by its codename L850, is a family of all-aluminium inline-four engines, displacing between 1.2 and 2.5 litres.Confusingly, the Ecotec name was also applied to both the Buick V6 Engine when used in Holden Vehicles, as well as the final DOHC derivatives of the previous GM Family II engine; the architecture was substantially re-engineered for this new Ecotec ...

  5. Valvetrain - Wikipedia

    en.wikipedia.org/wiki/Valvetrain

    Cutaway of a dual overhead camshaft engine 1969 AMC V8 overhead valve engine. The rocker cover has been removed, so the pushrods, rocker arms, valve springs, and valves are visible. A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. [1]

  6. Hydraulic tappet - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_tappet

    A hydraulic tappet, also known as a hydraulic valve lifter or hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine. Conventional solid valve lifters require regular adjusting to maintain a small clearance between the valve and its rocker or cam follower .

  7. Rocker cover - Wikipedia

    en.wikipedia.org/wiki/Rocker_cover

    A Shelby Mustang Windsor V8 engine with "Cobra Powered by Ford" labeled rocker (valve) cover (lower left) A 4-cylinder Lycoming O-320 aircraft engine, with the rocker box cover of one cylinder (of the two visible) removed to expose its rocker arms for inspection. A rocker cover, (UK), or valve cover (elsewhere) is a cover that encloses the ...

  8. Chevrolet Malibu - Wikipedia

    en.wikipedia.org/wiki/Chevrolet_Malibu

    This generation introduced the Chevrolet 90° V6 family of engines, with the 200 CID (3.3 L) V6 as the base engine for the all new 1978 Chevrolet Malibu, along with the 229 CID (3.8 L) V6 and the 305 CID (5.0 L) Chevy built V8 as options. The 200 and 229 engines were essentially a small block V-8, with one pair of cylinders removed.

  9. Tappet - Wikipedia

    en.wikipedia.org/wiki/Tappet

    On most overhead valve (OHV) engines, proper clearance between the camshaft and tappet is achieved by turning a set screw in the end of the rocker arm that contacts the end of the pushrod until a desired gap is achieved using a feeler gauge. Too large a gap results in wear from misaligned parts and compromised engine performance, and too small ...

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