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2. Valve guide - Wikipedia

   en.wikipedia.org/wiki/Valve_guide

   The upper part of the valve stem, within the rocker box, is lubricated by oil. If this oil travels unchecked along the valve stem, engine HC emissions will become excessive. To control this, an elastomeric seal is fitted over the top of the valve guide. These may wear or stiffen with age, so are usually replaced whenever valves are removed for ...

3. Valve leakage - Wikipedia

   en.wikipedia.org/wiki/Valve_leakage

   The importance of valve leakage depends on what the valve is controlling. For example, a dripping tap is less significant than a leak from a six-inch pipe carrying high-pressure radioactive steam. In the United States, the American National Standards Institute specifies six different leakage classes, with "leakage" defined in terms of the full ...

4. Tap (valve) - Wikipedia

   en.wikipedia.org/wiki/Tap_(valve)

   Turning a valve knob or lever adjusts flow by varying the aperture of the control device in the valve assembly. The result when opened in any degree is a choked flow . Its rate is independent of the viscosity or temperature of the fluid or gas in the pipe, and depends only weakly on the supply pressure , so that flow rate is stable at a given ...

5. Texas - Wikipedia

   en.wikipedia.org/wiki/Texas

   Texas (/ ˈ t ɛ k s ə s / ⓘ TEK-səss, locally also / ˈ t ɛ k s ɪ z / TEK-siz; [8] Spanish: Texas or Tejas, [b] pronounced) is the most populous state in the South Central region of the United States.

6. 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.

7. Illinois - Wikipedia

   en.wikipedia.org/wiki/Illinois

   Illinois (/ ˌ ɪ l ɪ ˈ n ɔɪ / ⓘ IL-in-OY) is a state in the Midwestern region of the United States.It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash and Ohio rivers to its south.

8. Pennsylvania - Wikipedia

   en.wikipedia.org/wiki/Pennsylvania

   This is an accepted version of this page This is the latest accepted revision, reviewed on 19 February 2025. U.S. state This article is about the U.S. state. For other uses, see Pennsylvania (disambiguation). "Penn." redirects here. For other uses, see Penn. State in the United States Pennsylvania Pennsilfaani (Pennsylvania Dutch) State Commonwealth of Pennsylvania Flag Seal Nickname: The ...

9. California - Wikipedia

   en.wikipedia.org/wiki/California

   California (/ ˌ k æ l ɪ ˈ f ɔːr n j ə /) is a state in the Western Region of the United States that lies on the Pacific Coast.It borders Oregon to the north, Nevada and Arizona to the east, and shares an international border with the Mexican state of Baja California to the south.