tappet adjusting screw
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adjusting screw — A small screw usually found on carburetors, brakes, or headlights which change the way something operates, such as increasing or decreasing the amount of fuel entering the engine; or changing the idle speed; or tightening up the brakes; or… … Dictionary of automotive terms
screw — [1] A spiral path along a cylinder. [2] A fastening device. A screw is like an inclined plane wrapped up. It can take a rotating force and change it into a much larger straight line force. See adjusting screw aiming screw air bleed screw air… … Dictionary of automotive terms
tappet wrench — A wrench designed for adjusting valve clearances on OHV engines with bucket tappet assembly that use an adjusting screw instead of valve shims for adjustment … 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
shim under bucket — A valve adjusting system where the valve clearance is adjusted by placing an appropriate thickness of shim under the tappet instead of using an adjusting screw … Dictionary of automotive terms
