What kind of wrench should be used to tighten engine components such as manifolds and cylinder heads?

"Torque Wrench"

Torque Wrench should be used to tighten engine components such as manifolds and cylinder heads. This is used to apply a precise or specific rotation to open nut bolts and stuff; it was invented by Conrad Bahr in New York City in 1918.

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physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."