| 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 |
| zoomies
| Exhaust headers that sweep back and up toward the top of the rear tires on an open-wheeled drag racer. |
| Zr
| Zirconium An element with the atomic number of 40 |
| zyglow
| A non-destructive testing system using a dye penetrant and ultraviolet light to check non-magnetic parts for faults and cracks. |
Auto & Car Glossary
