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2. Presta valve - Wikipedia

   en.wikipedia.org/wiki/Presta_valve

   A valve extender (black) is fitted between valve stem (brass) and core (silver). Valve extenders can be used to lengthen shorter Presta valves to accommodate deeper and thicker rims, such as those on aerodynamic race wheels. There are two variants of valve extenders depending on whether the Presta core is removable. [6]

3. Rocker arm - Wikipedia

   en.wikipedia.org/wiki/Rocker_arm

   However, these generally have the roller at the point where the cam lobe contacts the rocker, rather than at the point where the rocker contacts the valve stem. Friction may be reduced at the point of contact with the valve stem by a roller tip. A similar arrangement transfers the motion via another roller tip to a second rocker arm.

4. Valve stem - Wikipedia

   en.wikipedia.org/wiki/Valve_stem

   A valve stem is a self-contained valve that opens to admit gas to a chamber (such as air to inflate a tire), [1] and is then automatically closed and kept sealed by the pressure in the chamber, or a spring, [2] [3] or both, to prevent the gas from escaping.

5. Stellantis recalling more than 300,000 Ram trucks for braking ...

   www.aol.com/stellantis-recalling-more-300-000...

   Stellantis is recalling more than 300,000 Ram Heavy Duty pickup trucks because a faulty part could cause certain braking and tracking systems to fail. The Netherlands-based automaker said the ...

6. Valve guide - Wikipedia

   en.wikipedia.org/wiki/Valve_guide

   In the 1980s, many U.S. production engine remanufacturers began reaming valve guides, rather than replacing them, as part of their remanufacturing process. They found that by reaming all the valve guides in a head to one standard size (typically 0.008 in. diametrically oversized), and installing remanufactured engine valves having stems that are also oversized, a typical engine head can be ...

7. Poppet valve - Wikipedia

   en.wikipedia.org/wiki/Poppet_valve

   The valve stem D moves up to open the valve discs C. James Watt was using poppet valves to control the flow of steam into the cylinders of his beam engines in the 1770s. A sectional illustration of Watt's beam engine of 1774 using the device is found in Thurston 1878:98, [ 13 ] and Lardner (1840) provides an illustrated description of Watt's ...

8. Valve seat - Wikipedia

   en.wikipedia.org/wiki/Valve_seat

   Valve seats are often formed by first press-fitting an approximately cylindrical piece of a hardened metal alloy, such as Stellite, into a cast depression in a cylinder head above each eventual valve stem position, [1] and then machining a conical-section surface into the valve seat that will mate with a corresponding conical section of the ...

9. AOL Mail

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