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Glite Dictionary
tappet wrench

tappet wrench

9.9
A thin tool with fixed jaws that fits narrow nuts under engine covers
  • noun
  • Specialized
translation icon : llave de tacón
  • The mechanic reached for a tappet wrench to adjust the engine's valves.

Examples

  • This tappet wrench fits perfectly on the narrow nuts under the cover.

  • He keeps a set of tappet wrenches in his toolbox for precise work.

  • He used a tappet wrench to adjust the engine.

  • A tappet wrench is essential for this repair.

  • The mechanic reached for a tappet wrench to adjust the engine's valves.

  • He keeps a set of tappet wrenches in his toolbox for precise work.

  • This tappet wrench fits perfectly on the narrow nuts under the cover.

Synonyms

open-end wrench
vstappet wrench
  • Specialized
4.5

A tool with two flat open jaws that grip nuts or bolts

is similar but made for adjusting parts inside machinery rather than general fasteners

Surface Forms

tappet wrench singular
tappet wrenches plural

Morphology

tappet + wrench

The compound combines 'tappet' (an engine rod controlling valve movement) with 'wrench' (a hand tool), so the meaning—a wrench used to adjust tappets—is directly and compositionally derivable from the parts. This is a straightforward descriptive noun compound common across languages, so a B1 learner who knows both constituents would understand the MWE.

Etymology

The word tappet wrench comes from engine work: a tappet is a small part that moves up and down in an engine, and a wrench is a tool for turning nuts. Mechanics made a thin wrench with narrow, parallel jaws to reach and turn the nuts on the tappet, so tappet wrench now means 'a small wrench made to adjust tappets'.