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g: A unit of measurement for lateral acceleration,
or "road-holding." One "g" is equivalent to 981 cm (32.2
feet) per second every second, the rate at which any object accelerates when
dropped at sea level. If a car were cornering at 1.0 g -- a figure that very few
production cars are able to approach -- the driver's body would be pushing
equally hard against the side of the seat as against the bottom of it. Most fast
sedans accelerate about 0.8 g.
G7: Seven industrial countries consisting of the
United States, Japan, Germany, France, the United Kingdom, Italy and Canada,
whose leaders have met at annual economic summits since 1975 to coordinate
economic policies.
gage: American term for "gauge."
gaiter : A dust boot
gal.: Abbreviation for "gallon." A
US gallon (3.785 liters) is 20% smaller than an Imperial gallon (4.546 liters).
GALFAN : A trademark for a special type
o hot-dip galvanized steel sheet with a coating consisting of a zinc alloy
containing 5% aluminum and rare earths
gallery: A channel or tube usually
found within the engine block for the transfer of fluid or gas. See oil gallery.
gallon: A US gallon (3.785 liters) is
20% smaller than an Imperial gallon (4.546 liters).
Galvalume : trademark for a
special type of hot-dip galvanized steel sheet with a coating consisting of 55%
aluminum, 43.4% zinc and 1.6% silicon
galvanic : concerned with an
electrical current
galvanic cell: cell which
converts chemical energy into electrical energy by irreversible chemical
reactions
galvanic corrosion:
Corrosion due to the action of a galvanic cell. Compare bimetallic corrosion
galvanize : The action of plating
with zinc by hot dipping or electrodeposition to protect from rust
galvanize
differentially: The action of obtaining different coating thicknesses on the
two sides of the sheet of iron.
galvanized coating:
zinc or zinc based coating applied by galvanizing
galvanizing : application of
zinc coatings on the surface of a metal, by hot dipping or electrodeposition
galvanizing bath: A
bath for hot-dip galvanizing or electrogalvanizing
galvannealing : A thermal
process which gives improved adhesion to hot-dip galvanized steel sheets
galvanometer: An instrument
used to measure the pressure, amount of, and direction of an electric current.
gamma layer: part of the
zinc-iron alloy layer on hot-dip galvanized iron and steel containing 21-28%
iron
gantry : A structure with an overhead
beam, used for lifting out an engine. Compare engine hoist.
gap: [1] The distance between the center
terminal (electrode) and the outer terminal (electrode) through which the spark
must travel in a spark plug. Also see spark plug gap and air gap. [2] The
distance between the points in contact breaker points. See point gap. [3] The
distance between two vehicles travelling down the road as they go in the same
direction. Generally a safe distance is a minimum of two seconds behind the
vehicle in front. [4] The distance between the two ends of piston rings. See
piston ring end gap.
gap bridging: A formation of
carbon or other deposits across the spark plug gap which shorts out the plug
gap style: The arrangement or shape
of the spark plug electrodes
gapper: A device for determining the
distance between two metal contacts. See feeler gauge.
gapping: Adjusting the distance
between the electrodes of a spark plug or the points of contact breaker points.
Also see plug gapping.
garage : [1] A building in which a motor
vehicle is kept. [2] The premises on which motor vehicles are repaired or
serviced and/or where fuel is sold. [3] To keep in a garage
garaged : A reference to a vehicle
which is kept in a garage, as in My car is always garaged. The
abbreviation in advertisements is gar'd.
garage jack: A powerful
hydraulic jack used in garages
gar'd : An abbreviation used in classified
advertisements for "garaged"
garter spring: A long, thin
coil spring with ends joined to form a ring
gas: [1] A non-solid material. It can be
compressed. When heated, it will expand; and when cooled, it will contract.
(Such as air.) [2] A common term for gasoline. The British term is
"petrol." [3] A term for LPG or propane. Also see bottled gas. [4] A
term referring to the exhaust gases. See exhaust emissions. [5] To apply the
throttle.
gas burner: Competition vehicle
with engine set up to operate on standard pump gasoline instead of an alcohol,
nitro, etc., mixture. Also called "gasser."
gas chamber: A pressure chamber
of a single-tube shock absorber
gas damper: A gas shock absorber
gas discharge
headlight: A motor vehicle headlight with a gas discharge lamp
gas discharge lamp:
A discharge lamp in which light is generated by gas discharge
gas discharge light:
A discharge light in which light is generated by gas discharge
gas-driven
generator: a generator which turned by a gas engine.
gaseous : Referring to gas
gaseous
discharge lamp: A gas discharge lamp
gaseous
discharge headlight: A A gas discharge light
gas filter: A device for screening
the gasoline to remove the impurities. See fuel filter.
gas flow: The flow of the air/fuel
mixture or the exhaust gases in an engine
gas gage: See gas gauge.
gas gauge: An instrument, usually
located on the dashboard or center console, which indicates the amount of fuel
in the fuel tank. Most gauges have a needle which fluctuates between
"E" (empty) and "F" (full). Others show a digital readout of
how many gallons or liters left in the tank. Also called "fuel gauge."
gas guzzler: A vehicle which
uses a lot of gasoline per mile.
gasket: A material made of asbestos,
cardboard, cork, paper, rubber, or soft metal placed between two metal parts to
insure proper sealing. See base gasket, blown head gasket, and head gasket.
gasket punch: A tool used to
cut out holes in a sheet of gasket material to shape a gasket to size.
gasket scraper: A scraper
with a sharp chisel edge for removing old gasket material from a surface before
installing a new gasket
gas metal-arc
welding: Welding using a continuously fed consumable electrode and a
shielding gas. Also called "sigma welding."
gasohol: A blend of gasoline and
ethanol alcohol that usually is 90% gasoline and 10% ethanol. Ethanol is the
alcohol found in intoxicating beverages. It may attack rubber and plastic parts
of fuel systems not designed to handle alcohol-blended fuels, but it is not
poisonous to human beings like wood alcohol or methanol.
gasoline: A hydrocarbon fuel used in
the internal combustion engine. Gasoline is refined from crude oil which is made
up of fossilized plant and animal remains. Also see ethyl gasoline, oxygenated
gasolines, and reformulated gasolines.
gasoline pump: !!!
Definition under construction !!!.
gas pedal: The device actuated by
the operator's foot for increasing or decreasing the amount of fuel entering the
combustion chamber. Also called "throttle pedal." See accelerator.
gas pockets: Cavities in weld
metal caused by trapped gas.
gas prop: A gas-assisted strut like a
hatch strut, hood strut, or tailgate strut
gas pump: A device at a service
station which pulls gasoline from a storage tank (usually located underground)
into the vehicle's gas tank. Commercial units also record the amount of fuel
dispensed as well as the cost.
gasser: A vehicle which uses gasoline in
the engine to run. See gas burner.
gas shock: A gas-assisted shock
absorber
gas shock absorber:
A gas-assisted shock absorber
gassing: The small hydrogen bubbles
rising to the top of the battery electrolyte during battery charging.
gas spring: A pressurized,
nitrogen-filled sphere, used in Hydragas and hydropneumatic suspension systems
gas station: A place where
gasoline is dispensed.
gas tank: The container for holding or
storing fuel. See fuel tank.
gas-tight : sealed to prevent the
passage of gas
gas
tungsten-arc welding: Welding using a tungsten electrode and a shielding
gas.
gas turbine: An
internal-combustion rotating engine with one main moving part: the rotor with
pinwheel-like blades attached. Air is compressed by the first rows of blades and
delivered to the combustion chambers, from which the exhaust is directed to pass
the remaining blades and to generate the power. Power is extremely smooth due to
the absence of explosions and reciprocating parts.
gas welding: A welding process
widely used in body repair shops (now being gradually replaced by MIG welding).
Also called oxyacetylene welding
gate: [1] The slotted guide for the
gearshift of an internal combustion engine. [2] The slotted guides in a shift
drum. [3] A tailgate.
GATT: Acronym for General Agreement on
Tariffs and Trade.
gauge: This is the British and Canadian
spelling while in the United States it is sometimes spelled without the
"u" (gage). [1] An instrument that registers the quantity of a
substance, e.g., fuel gauge , ammeter, voltmeter, temperature gauge, oil gauge,
oil pressure gauge, vacuum gauge. [2] A tool for measuring clearances,
pressures, sizes, etc. See B & S gauge, compression gauge, dial gauge, and
feeler gauge.
gauntlet: A long-sleeved leather
glove used by motorcyclists to prevent wasps from flying up the sleeve, as one
did to me.
GAWR : Acronym for "Gross Axle Weight
Rating."
Gaylord: The 1955-57 models are
milestone cars.
G-clamp : A screw-activated clamping
device in the shape of the letter "G"
GCW: Acronym for gross combination weight.
gear: Wheel-like part with teeth cut into
the rim. When one gear meshes with another gear, it causes the second gear to
drive the other and in this way transmits power. When the gears are different
sizes (different number of teeth on each gear) the mechanical average is
changed. Also see axle end gears, bevel gear, camshaft gear, cluster gear,
constant mesh gears, crankshaft gear, flywheel ring gear, helical gear,
herringbone gears, high gear, hypoid gear, idler gear, intermediate gear, low
gear, passing gear, planet gears, reverse idler gear, ring gear, sliding gear,
spider gear, spiral bevel gear, spur gear, steering gear, straight-cut gear, sun
gear, timing gear, wide-step gearing, and worm gear.
gearbox: The device in the drivetrain
consisting of an input shaft, a system of gears, and an output shaft that
multiplies engine torque. A manual transmission consists of a clutch assembly
plus a gearbox; and automatic transmission generally consists of a torque
converter plus gearbox. Also see constant mesh gearbox, planetary gearset, and
rack and pinion gearbox.
gearbox input shaft:
A shaft which transmits power from the clutch to the gearbox
gearbox output shaft:
A shaft which transmits the drive out of the gearbox
gearchange : A British term for
the process of changing gears or shifting gears.
gearchange cables:
British term for shifting cables used to operates gears in some transmissions.
In most vehicles rods and joints are used because cables tend to stretch.
gearchange linkage: A system of rods and joints used to operate the
gearbox. British term for shifter linkage
gearchange
mechanism: A system of rods and joints used to operate the gearbox. British
term for shifter mechanism
gear grease: A heavy liquid
grease that fills the differential and manual transmission to lubricate the
gears. Also called "differential grease."
gear indicator: A display
which shows the particular transmission gear that has been selected.
gearing : [1] The combination or
system of gears or sprockets designed to transmit power. [2] The ratio between
the drive gear and the driven gear. See alpine gearing and half-step gearing.
gear knob: British term for the knob
at the end of a lever, i.e., shifter knob
gear lever: A device which is
attached to the side of a steering column or to the center console which will
allow the operator to change the gears of the transmission. Also called
"shift lever." Also see left hand gear lever.
gear oil: A heavy oil which is rated
at 80 to 100 weight viscosity used in enclosed units containing gears. This oil
infrequently or rarely needs changing.
gear puller: A tool with two or
more jaws and pressure screw for pulling off gears, bearings, pulleys, etc.
gear pump: The simplest oil pump
with two gear wheels
gear range: choice of gears in an
automatic transmission. The typical gear ranges are: P - Park, R - Reverse, N -
Neutral, D -Drive, L - Low
gear ratio: The relationship
between the number of turns made by a driving gear to complete one full turn of
the driven gear. If the driving gear turns four times to turn the driven gear
once, the gear ratio would be 4 to 1. In most instances, the gear ratio is not
even like 4:1 because the same teeth would be meshing with each other. Thus a
ratio of 4.11:1, for instance, means that a particular tooth on one gear may
eventually mesh with every one of the teeth on the other gear. Changing the tire
size will change the effective gear ratio.
gear selector: The device
(e.g., lever or rod or pushbutton) for choosing the desired transmission gear.
See gearshift.
gear selector
indicator: An indicator positioned in the instrument cluster or on the
centre console shift gate indicating which gear has been selected in an
automatic transmission
gearset: A group of two or more gears
used to transmit power.
gearshift: A device which allows
the operator to move the transmission gears into various configurations. Most
often the gearshift is located on a lever on the steering column or on a lever
on the floor between the driver and front passenger. Some older Chryslers had
pushbutton controls on the dash.
gearshifter: A device which
allows the operator to move the transmission gears into various configurations.
Most often the gearshift is located on a lever on the steering column or on a
lever on the floor between the driver and front passenger. Some older Chryslers
had pushbutton controls on the dash.
gearstick : A British term for the
stick used by the driver to change gears. Also called a "shifter" or
"shift lever."
gear tooth: The indentation on the
edge of a gearwheel
gear train: A system of gears that
transmits drive from one shaft to another
gear-type oil pump:
The simplest oil pump with two gear wheels
gearwheel : A gear
gel : [1] A substance like jelly [2] to become
like jelly
gel coat: [1] A thin layer of plastic
resin covering fiberglass panels. [2] An outer layer of GRP (glass reinforced
plastic) mouldings which gives a smooth surface that may be coloured
gel-coat resin: A resin
similar to general lay-up resin but with an additive to make it thixotropic,
i.e., it does not run down vertical surfaces; used to make the gel coat in
moldings
gelling drier: A drier for
PVC sealants
Gemmer steering: A
cam-and-roller steering
general
Agreement on Tariffs and Trade: (GATT) Signed in 1947, the GATT was a formal
multilateral agreement aimed at expanding and liberalizing world trade. The
World Trade Organization which is the successor to the GATT came into existence
on January 1, 1995.
general corrosion:
In contrast to pitting, a type of corrosion which affects the entire surface of
a metal
generalized
Preferential Tariff: (GPT) system of non-reciprocal tariff preferences for
the benefit of developing countries. It grants duty-free or preferential entry
to imports for eligible developing countries up to a certain dollar value or
import percentage limit.
General Motors: (GM) or
(GMC) The largest American vehicle manufacturer including Chevrolet, Buick,
Pontiac, Oldsmobile, Saturn, Cadillac, GMC trucks, and HUMMER. It has
subsidiaries and associates in Britain (Vauxhall), European continent (Opel,
Fiat, and Saab), Australia (Holden), Asia (Subaru, Fuji, Suzuki)
general
purpose lacquer thinner: A type of thinner that may be used for both
lacquers and synthetic enamels without causing lifting or other paint faults
general purpose
pliers: Any kind of typical multi-purpose pliers.
generate : To produce.
generator: [1] A mechanism which
generates or produces some substance, i.e., electric generator, acetylene
generator. [2] An electromagnetic device for producing direct current
electricity. It was replaced by an alternator in the early '60s. Its problem was
that a generator recharged the battery only at high speeds. The British call it
a "dynamo." Also see alternator and third brush.
geometry : The design, layout, or
arrangement of parts
GHGs: Acronym for "Greenhouse
Gases."
gib head key: See gib-head key.
gib-head key: A special bar of
any length like a flat key or square key, but one end is specially shaped to
prevent the key from going all the way through.
girder spanner: A British
term for an adjustable wrench with jaws at right angles to the handle.
girl's bike: A bicycle where the
horizontal top bar (of a "boy's bike") is angled down from the
steering tube down to the bottom bracket and is usually parallel with the down
tube. See ladies' frame.
Giuletta: See Alfa Romeo.
Giulia: See Alfa Romeo.
GL: [1] A term referring to gold line tires
marketed in the late '60s and early '70s. [2] (short for) Grand Luxe, meaning
more luxurious than a standard model, L (= Luxe); (compare CL)
glad hands: A separable mechanical
connector used to join air line hoses when combination vehicles are coupled
together.
gland : A seal that stops fluid under
pressure from leaking past a rotating or reciprocating shaft or rod
glandless : Something without a
seal
glare : [1] strong, bright light (e.g.,
from oncoming traffic) [2] to shine too brightly; to dazzle
glass : [1] A transparent, hard,
amorphous, brittle substance which is made by fusing together one or more of the
oxides of silicon, boron, or phosphorus, with certain basic oxides (e.g.,
sodium, magnesium, calcium, potassium), and cooling the product rapidly to
prevent crystallization or devitrification. The melting point varies between 800°C
and 950°C but it is worked at higher temperatures. The tensile strength of
glass reides almost entirely in the outer skin; if this is scratched or
corroded, the glass is much more easily broken. [2] The transparent windows in a
vehicle.
glass area: The window surface
area of a vehicle body; may also refer to the whole area of the body above the
waistline. Also called the greenhouse.
glass channel: A U-shape
metal guide which holds the bottom edge of a roll-up automobile window and fits
inside the door. The British term is "window channel."
glass fibre: A very thin glass
thread, used loosely or in woven form as an acoustic, electrical, or thermal
insulating material and as a reinforcing material in laminated plastics
glass holder: A tool with
suction cup(s) to hold and carry a sheet of glass
glass pack muffler:
A straight through (no baffles) muffler using fibreglass packing around a
perforated pipe to deaden exhaust sound.
glasspaper : An abrasive paper
coated with particles of glass, used for smoothing and polishing
glass
reinforced filler paste: A polyester filler that has strands of fibreglass
added into the filler paste to increase the rigidity of the repair
glass
reinforced plastic: (GRP) The basic material for the manufacture of
fibreglass body shells and panels; it is made up of several layers of fibreglass
mat or cloth and various types of resins
glaze: A highly smooth, glossy finish on
the cylinder walls. As the piston rings rub up and down the cylinder, the rings
polish the cylinder wall. Cylinder wall glazing reduces sealing efficiency. The
only cure is to have the cylinder deglazed.
glaze breaker: An abrasive
tool used to remove the glaze from cylinder walls prior to the installation of
new piston rings. Also called "deglazer."
glazing: Use of special putty to fill
minor imperfections when doing body repair. Also see spot glazing.
g-loads: Gravitational loads,
expressed in multiples of the force of gravity acting on an object. In a car,
these can be felt in acceleration, braking or cornering. In most passenger cars,
these loads seldom exceed 0.3 or 0.4 Gs in any direction, unless in an urgent
situation. Race cars can achieve several Gs, due to excellent tires and prepared
racing surfaces.
global
Positioning Satellite: The technology which allows a vehicle to be tracked
anywhere in the world with near-perfect accuracy. The Global Positioning
Satellite (GPS) system was first used by the military, but has been adopted by
companies such as General Motors for use with their OnStar communication system.
Several after-market communication systems using GPS are also available
gloss: The ability of a paint to reflect
images when polished.
glove: See barrier cream
glow plug: An electrical element
located in the combustion chamber of a diesel engine which helps to heat up the
air in the chamber so that the diesel will be ignited more quickly. Often they
are connected in series so that when one becomes defective the others are
inoperative.
glycol: See ethylene glycol and
antifreeze.
glycote: See poly-glycotes.
glycotes: See poly-glycotes.
GM: Acronym for "General Motors Corp."
GMC: Acronym for "General Motors
Corporation."
good will warranty:
Normal warranty specifies that a product is covered for manufacturer's defects
for a period of time or distance of use. If the item has gone beyond the normal
warranty, the dealer may offer some warranty in order to keep your business. The
dealer may pick up the costs for parts and labor, or just the labor, or 50% of
the overall costs, or just a nominal sum.
gouging: Cutting of a groove in the
surface of a metal using a gas cutting torch of an arc-air cutting outfit.
governor: A device designed to
automatically control the speed or position of some part. Governors are used to
prevent an engine from exceeding its maximum rpms. They are also used on rental
vehicles to prevent operators from speeding.
GPM: Acronym for "gallons per
minute."
GPS: Acronym for "Global Positioning
(via) Satellite."
GPT: Acronym for "Generalized
Preferential Tariff."
Graham-Paige: Only the
Custom body of 1925-1948 with required application are classic cars.
grand Touring
Prototype: (GTP).
granny gear: Colloquial term for
the tiny inner chainring on a triple chainring crankset of a bicycle. Needed for
climbing steep hills especially with a loaded bicycle.
Gran Turismo: (GT) A car which
combines the features of both the sedan and sports car. It features excellent
engineering and road handling with relative comfort. Made in two-seater and
four-seater models with cramped rear seats.
grand Touring: (GT) See Gran
Turismo.
gravity: The attractive force exerted
by one body on another. All bodies which have mass have this property. The pull
of the earth upon objects so that they fall at the rate of 981 cm (32.2 feet)
per second every second. Also see center of gravity, g, and specific gravity.
gravity, center: The force
which causes a body to fall to the earth. See center of gravity.
gray Market Vehicles:
Cars that have been imported into the country through unauthorized means. It is
likely they won't meet American safety and emission standards. These cars have
significantly lower values than vehicle imported through normal channels.
grease: A lubricant which reduces the
friction between moving pieces of metal and also prevents moisture from causing
metal to rust. See gear grease and lube grease.
grease fitting: A device
that seals in and allows the addition of more grease, or some other type of
lubricant, to cushion two moving parts, allow them to move freely, and prevent
them from wearing each other away. Found on ball joints, steering knuckles,
tie-rod ends. Also called "zerk fitting."
grease gun: A small, hand-operated
pump that can be loaded with grease and used for lubricating the grease fittings
on a vehicle. Adapters can be attached to the grease gun so that grease can be
forced even into sealed bearings.
grease pencil: A writing
device which writes in grease or wax. It is used to mark tires because it can be
easily rubbed off.
grease seal: A circular metal
disk covered in rubber or plastic with a center hole, an edge on the outside
circumference, and another edge on the center hole with a spring to retain
tension on the shaft that fits into the hole. It is used to keep grease and oil
from leaking out and protects bearings from dirt and water. Also called
"oil seal."
green flag: A green flag is used
to restart the race. The pace car will pull off the track into pit lane and the
race resumes. Note: the race cars do not come to a stop on the track at anytime,
unless a red flag is thrown.
green
flag with yellow diagonal stripe: The green flag with a yellow diagonal
stripe signals a slower driver to move over on the track and let the leaders
proceed. This usually occurs near the end of a race when the slower car is many
laps behind. This flag is to ensure safety for the cars still racing for the
win.
greenhouse: The glass area of a
car or truck.
greenhouse gases: (GHGs)
Group of gases which individually act to trap solar energy near the earth. GHGs
for which emission levels have been estimated are carbon dioxide (CO2),
methane (CH4), nitrous oxide (N2O), sulphur hexafluoride
(SF6), carbon tetrafluoride (CF4), carbon hexafluoride (C2F6)
and hydrofluorocarbons (HFCs).
green tire: The complete
rubber/fabric/steel tire just before being cured.
grey market: the grey market
describes the purchase by intermediaries of product which is not supplied to
them by the "authorized" distribution channel of the supplier. Thus, a
warehouse club in Canada that sells a stereo bought in the U.S. or elsewhere
from other than the manufacturer is supplying grey market goods. While grey
market products are frequently the same as would be available from conventional
channels in Canada, the grey market assumes responsibility for service or repair
where the manufacturer declines this support.
grid: The lead screen or plate to which the
battery plate active material is attached.
grill: Alternate spelling of
"Grille."
grille: A grating or crosswork of bars
usually as an ornamental cover of the radiator which allows air to cool the
engine.
grind: To remove metal from an object by
means of a revolving abrasive wheel, disc, or belt. Also see valve grinding and
valve seat grinding.
grinder: A device to remove metal from
an object. See brake shoe grinder.
grip: !!! Definition under construction !!!.
groove: [1] A channel or gouge in metal
(see piston ring groove) or in the tread of a tire. [2] Another name for a
viable racing lane on the race track.
groove cracks: Splitting or
cracking of the rubber (undertread) at the base of the grooves, between tread
ribs. Primarily caused by growth in textile casings.
groove insert: See top ring
groove insert.
grooving: The cutting of a tread
design into tread rubber where a design does not already exist. Also altering an
original design, i.e., cross-grooving to increase traction.
groove weld: A welding rod fused
into a joint which has the base metal removed to form a V, U, or J through at
the edge of the metals to be joined.
gross
combination weight: The weight of a truck and trailer combination and its
entire contents.
gross margin: The return an
intermediary achieves on the selling price of the article. That is, if the
intermediary buys a product for $1 and sells it for $1.50, the margin is
calculated. For example, .50 divided by $1.50, or 33%.
gross ton: 2240 pounds. Also called
"long ton."
gross train weight:
Same as gross combination weight.
gross vehicle weight:
(GVW) Maximum legal weight at which a vehicle can be operated. The total weight
of a fully equipped truck and payload.
ground: Terminal of battery that is
connected to the metal framework of the vehicle so that the frame acts as a
conductor of electricity. In North America, the negative terminal is grounded.
In British terms, it is called "Earth." Also see cam-ground piston.
ground and polish: To
cut and polish a crankshaft bearing surface to precision specifications.
ground connection: A
wire or other metal strip for connecting a component to the vehicle chassis or
body
ground effect: The
phenomenon that occurs when the airflow between a moving object and the ground
creates downforce.
ground electrode: The
side electrode of a sparking plug. The opposite is the center electrode
ground return: The return
path of an electrical circuit, provided by a ground connection
ground strap: A wire cable or
braided wire strap to transfer electricity. It can be found between the engine
block and the chassis
because the engine is isolated from the chassis
by rubber mounts. Also called battery strap. See ground
wire.
ground wire: The wire which goes
from the negative post of the battery
to the frame
on negative
ground vehicles. Another ground wire may be a thick wire or braided wire
cable which connects the engine to the frame.
Since many engines are rubber mounted, there may be no metal contact between the
engine and the frame apart from the ground wire which may also be called the ground
strap. In British terms, it is called "earth wire."
group of seven: (G7) seven
industrial countries consisting of the United States, Japan, Germany, France,
the United Kingdom, Italy and Canada, whose leaders have met at annual economic
summits since 1975 to coordinate economic policies.
growler: An instrument used in testing
starters
and generator armatures.
growth: See tire
growth.
GRRF: Acronym for "Groupe
de travail en matière de Roulement et de Freinage" (i.e., Working
Party on Brakes and Running Gear)
GT: Acronym for "Gran Turismo" or
"Grand Touring."
GTO: Acronym for "Gran Turismo Omologato."
GTP: Acronym for "Grand
Touring Prototype."
GTS: Acronym for "Global Tire
Standard."
GTW: Acronym for gross
train weight.
guarantee: A promise by the
manufacturer to fix or replace a specific part if it does not last for a
specific time period or distance.
gudgeon pin: British term for a piston
pin or wrist pin.
guide: A device which allows a long shaft
to do its job without flexing. See valve
guide.
guided send test:
Bending a specimen in a definite way by using a fixture.
gum: oxidized
portions of the fuel that form deposits in the fuel
system or engine parts.
gum stock: Rubber compounds
containing only the necessary ingredients for vulcanizing. Reinforcing fillers
are not present in gum stock. Also see cushion
gum.
gun: See grease
gun.
gut: To strip the interior of the vehicle. May
also refer to removing the internal baffles
from a muffler.
gutted muffler: A muffler
with no silencing baffles.
Makes a very loud sound.
gutter: The recessed part on a truck rim
base that holds the lock ring in place.
gutter bevel: Truck rims are
bevelled to provide for the gutter and this bevel matches a 28° taper at the
inside of the cast spokes, holding the rim in place.
GVW: Acronym for "Gross Vehicle
Weight" -- the total weight of a fully equipped truck and payload.
GVWR: Acronym for "Gross Vehicle Weight
Rating" -- the standard or rating of a vehicle's carrying capacity. It
includes the weight of the vehicle, fuel, fluids, and full payload.
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