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  2. Automobile engine replacement - Wikipedia

    en.wikipedia.org/wiki/Automobile_engine_replacement

    A short block is the preferred replacement component for a worn-out engine that requires major servicing beyond the capabilities of a local repair garage, when instead a machine shop may be needed. The short block represents the major wear items of an engine: piston rings, and potentially a rebore of the cylinder bores or replacement liners ...

  3. Engine tuning - Wikipedia

    en.wikipedia.org/wiki/Engine_tuning

    Engine tuning is the adjustment or modification of the internal combustion engine or Engine Control Unit (ECU) to yield optimal performance and increase the engine's power output, economy, or durability. These goals may be mutually exclusive; an engine may be de-tuned with respect to output power in exchange for better economy or longer engine ...

  4. Engine balance - Wikipedia

    en.wikipedia.org/wiki/Engine_balance

    With a V angle of 90 degrees and offset crank pins, a V-twin engine can have perfect primary balance. If a shared crank pin is used (such as in a Ducati V-twin engine), the 360° crankshaft results in an uneven firing interval. These engines also have primary reciprocating-plane and rotating-plane imbalances.

  5. Harmonic damper - Wikipedia

    en.wikipedia.org/wiki/Harmonic_damper

    Harmonic balancer lower pulley on a four-cylinder engine. A harmonic damper is a device fitted to the free (accessory drive) end of the crankshaft of an internal combustion engine to counter torsional and resonance vibrations from the crankshaft.

  6. Straight-six engine - Wikipedia

    en.wikipedia.org/wiki/Straight-six_engine

    Crankshaft with four main bearings. Crankshafts for straight-six engines usually have either four main bearings (i.e., a bearing in between each pair of crankpins and one at each end) or seven main bearings (i.e., a bearing between every crankpin): Large displacement and diesel engines typically use seven bearings to minimize crankshaft flex.

  7. Crankshaft - Wikipedia

    en.wikipedia.org/wiki/Crankshaft

    Crankshaft (red), pistons (gray), cylinders (blue) and flywheel (black) A crankshaft is a mechanical component used in a piston engine to convert the reciprocating motion into rotational motion. The crankshaft is a rotating shaft containing one or more crankpins, [1] that are driven by the pistons via the connecting rods. [2]

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Propeller speed reduction unit - Wikipedia

    en.wikipedia.org/wiki/Propeller_Speed_Reduction_Unit

    The load of a propeller and reduction unit can alter the resonant frequencies of the crankshaft, allowing torsional vibration to increase rapidly to high levels at certain rotational speeds. Measures taken by the designer to mitigate torsional resonances in the original design of the engine can be rendered ineffective if the resonant frequency ...

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