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2. Schrader valve - Wikipedia

   en.wikipedia.org/wiki/Schrader_valve

   The Schrader valve consists of a valve stem into which a valve core is threaded. The valve core is a poppet valve assisted by a spring. A small rubber seal located on the core keeps the fluid from escaping through the threads. Using the appropriate tools, a faulty valve core can be immediately extracted from the valve stem and replaced with a ...

3. Heyco - Wikipedia

   en.wikipedia.org/wiki/Heyco

   Heyco was founded in 1937 by Max and Ernst Heynen and started off manufacturing hand tools for the early automotive industry in Remscheid, Germany. From 1945, after World War II, Heyco began production of tools for assembly line automobile production. Heyco expanded to Tittling/Bavaria, Germany in 1961, as its first site outside of Remscheid.

4. Chest (mechanical engineering) - Wikipedia

   en.wikipedia.org/wiki/Chest_(mechanical_engineering)

   A timing chest or valve chest is a compartment on an internal or external combustion engine (e.g. gasoline or steam engine) which provides access to the tappets and valves. The chest is fitted with an inspection cover sealed with a gasket .

5. 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 .

6. Core plug - Wikipedia

   en.wikipedia.org/wiki/Core_plug

   Core plugs are usually thin metal cups press fitted into the casting holes, but may be made of rubber or other materials. The most common metal plugs used in automotive engines are made from plated mild steels, stainless steels, brass or bronze. In some high-performance engines the core plugs are large diameter cast metal threaded pipe plugs. [3]

7. 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.