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  2. Blowoff valve - Wikipedia

    en.wikipedia.org/wiki/Blowoff_valve

    A blowoff valve is designed to release pressure in the intake system when the throttle is closed. A "recirculating" type blowoff valve releases the pressurised air back into the non-pressurized section of the intake (i.e. upstream of the turbocharger), while an "atmospheric venting" type blowoff valve dumps the air directly into the atmosphere.

  3. Crankcase ventilation system - Wikipedia

    en.wikipedia.org/wiki/Crankcase_ventilation_system

    The intake manifold vacuum, with wide open throttle, is lower in these conditions, which causes the PCV valve to open and the crankcase gases flow to the intake system. [13] The greater flow rate of intake air during these conditions means that a greater quantity of blow-by gases can be added to the intake system without compromising the ...

  4. Head gasket - Wikipedia

    en.wikipedia.org/wiki/Head_gasket

    The cost of the replacement component (i.e. the head gasket itself) is usually relatively low, however there are significant labor costs involved in the replacement process. [6] This is because the process of removing and replacing the cylinder head is a time-consuming task.

  5. Valvetrain - Wikipedia

    en.wikipedia.org/wiki/Valvetrain

    A valvetrain is a mechanical system that controls the operation of the intake and exhaust valves in an internal combustion engine. [1] The intake valves control the flow of air/fuel mixture (or air alone for direct-injected engines) into the combustion chamber, while the exhaust valves control the flow of spent exhaust gases out of the ...

  6. Gasket - Wikipedia

    en.wikipedia.org/wiki/Gasket

    It is important to make the sealing finish properly otherwise it will cause leakage. A surface that is too smooth can allow your gasket material to blow out under pressure. A surface that is not machined flat can provide leak paths. A good rule of thumb is a machined surface to 32RMS.

  7. Boost controller - Wikipedia

    en.wikipedia.org/wiki/Boost_controller

    In the past, boost pressures have been controlled by restricting or bleeding off some intake air before it reaches the intake manifold. Designs which restrict the intake air can use a butterfly valve in the intake to restrict airflow as desired boost is approached. Designs which bleed off the intake air functioned similar to a blowoff valve ...

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