valve stem end
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Valve — This article is about the flow control device. For the game developer, see Valve Corporation. For the electronic component, see Vacuum tube. For other uses, see Valve (disambiguation). These water valves are operated by handles. A valve is a… … Wikipedia
valve keeper — A small unit that snaps into a groove in the end of the valve stem. It is designed to secure the valve spring, valve spring retaining washer and valve stem together. Some are of a split design, some of a horseshoe shape, etc. Also called valve… … Dictionary of automotive terms
Valve guide — In most types of reciprocating engines, a valve guide is provided for each poppet valve in the cylinder head. Along with the valve spring, it serves to positively locate the valve so that it may make proper contact with the valve seat. A valve… … Wikipedia
valve umbrella — A washer like unit that is placed over the end of the valve stem to prevent the entry of excess oil between the stem and the guide. Used in valve in head installations … Dictionary of automotive terms
valve rotator — A unit that is placed on the end of the valve stem so that when the valve is opened and closed, the valve will rotate a small amount with each opening and closing. This gives longer valve life. Also called roto cap … Dictionary of automotive terms
valve clearance — The distance between the small end of the valve stem and the rocker arm or valve lifter. This gap is necessary to compensate for expansion due to heat. Also called valve lash … Dictionary of automotive terms
valve tappet — An adjusting screw to obtain the specified clearance at the end of the valve stem (tappet clearance). The screw may be in the top of the lifter, in the rocker arm, or in the case of the ball joint rocker arm, the nut on the mounting stud acts in… … Dictionary of automotive terms
stem — stem1 stemless, adj. stemlike, adj. /stem/, n., v., stemmed, stemming. n. 1. the ascending axis of a plant, whether above or below ground, which ordinarily grows in an opposite direction to the root or descending axis. 2. the stalk that supports… … Universalium
valve box — Steam Steam (st[=e]m), n. [OE. stem, steem, vapor, flame, AS. ste[ a]m vapor, smoke, odor; akin to D. stoom steam, perhaps originally, a pillar, or something rising like a pillar; cf. Gr. sty ein to erect, sty^los a pillar, and E. stand.] 1. The… … The Collaborative International Dictionary of English
valve chest — Steam Steam (st[=e]m), n. [OE. stem, steem, vapor, flame, AS. ste[ a]m vapor, smoke, odor; akin to D. stoom steam, perhaps originally, a pillar, or something rising like a pillar; cf. Gr. sty ein to erect, sty^los a pillar, and E. stand.] 1. The… … The Collaborative International Dictionary of English
Schrader valve — The Schrader valve, invented by August Schrader in the 1890s, consists of a valve stem into which a valve core is threaded, and is used on virtually all automobile tires and wider rimmed bicycle tires. The valve core is a poppet valve assisted by … Wikipedia
