- Z -

Z

Cutting Z-like notches in a frame to lower the vehicle.

Z-2

Zenith 2-bbl. Carburetor.

Z-Axis

[1] Represents the intensity or brightness of the display on an Oscilloscope [2] In a Cartesian coordinate system, the axis which is perpendicular to the x-y plain.

Zap

The vertical axis around which a vehicle structure's front and rear ends swing back and forth.

ZDV

Zinc divert valve.

Zener Diode

A diode often used in electronic voltage regulators. Allows reverse bias current flow without damage to the avalanche region.

Zener Region

The region current enters into when it flows through a diode in the reverse direction.

Zepto

The prefix representing the number 0.000,000,000,000,000,000,001.

Zerk

A term used for zerk fittings.

Zerk Fitting

A nipple-like lubrication fitting through which grease is applied to a chassis or suspension joint with a grease gun.

Zero Emissions Vehicle (ZEV)

An electric, Hydrogen,or other vehicles that perduce zero levels of HC, CO, and NOx.

Zero Lash

No clearance between valve lifter and camshaft lobe.

Zero Toe

Adjusting the wheels so they point straight ahead.

Zero-Gap Ring

A piston ring that does not have end clearance.

Zetta

The prefix representing the number 1,000,000,000,000,000,000,000.

ZEV

Zero emissions vehicle.

Zinc Inner Liner

A thin zinc-metal leaf between the longer steel leaves of a leaf-spring suspension system to control sliding friction between the leaves, and prevent corrosion on certain models.

Zing

To unintentionally over rev an engine.

Zirc Fitting

A zerk fitting made of zirconium allow.

Zn

Zinc An element with the atomic number of 30.