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Glite Dictionary
tappet

tappet

1 9.9
A small part in an engine that moves up and down to open or close a valve
  • noun
  • /ˈtæpɪt/
  • Specialized
translation icon : tacón

Examples

  • Two extra belts, extra springs, extra couplers, extra bits for the tappet valves.

  • Busted tappets.

    I.Q. (1994)

  • Although, since I'm also doing a rebuild on my 3.9 Discovery and need new cams and tappets.

    Blog text (1)

  • The tappet in the engine pushes the valve open as the piston moves down.

  • Adjusting the tappet clearance is essential for optimal engine performance.

  • The mechanic inspected the tappet to ensure it was functioning properly.

Compounds

tappet wrench
  • Specialized
9.9

A thin tool with fixed jaws that fits narrow nuts under engine covers

Surface Forms

tappet singular
tappets plural

Etymology

Tappet comes from the simple verb tap ('to hit' or 'to strike') plus the small ending -et, so it originally meant 'a little tap'. That's why a tappet is a small rod or lever in an engine that moves up and down to 'tap' a valve and make it open or close.