The gear selector is the lever that lets you select a certain gear with an automatic transmission. In modern cars, the gear selector is often connected to the brake pedal, so that you can only shift into drive or reverse when your foot is on the brake.
What is Generator?
A generator is like an alternator in that it generates electrical current to both keep the battery charged and supply electricity for a vehicle’s electric system.
What is Glazing Belts?
Glazing is a shiny coating on the inside surface of a fan, or serpentine belt. Glazing occurs when the belt slips repeatedly at a high speed. It is a sign that the belt needs replacement.
What is Gear Synchronizers?
Gear synchronizers allow you to upshift and downshift a manual transmission without grinding gears. They do this by synchronizing, or matching, the speed of the engine and the speed of the gear you are selecting. If your car didn’t have gear synchronizers (also known as synchromesh), you would either have to match the engine speed…
What is Gasket?
A gasket is a piece of material that seals two parts together. The gasket prevents air or fluids from leaking between the parts.
What is Gas Grade?
This is a general term that refers to a gasoline’s general quality – for instance, its octane rating and package of additives. The two common terms for gas grades are “regular” for low-grade gas, and “premium” for high-grade gas.
What is Gearshift Lever?
The gearshift lever is the lever that lets you select gears with a manual transmission.
What is Glow Plugs?
Glow plugs are only found on vehicles with diesel engines. Glow plugs heat up the diesel fuel before the engine has been started, making the engine easier to start.
What is HC?
An acronym for Hydrocarbons. Any number of compounds of carbon and hydrogen used as fuel, such as gasoline. High levels of hydrocarbons in tailpipe emissions are a result of unburned gasoline.
What is Hydrocarbons?
Hydrocarbons (HC) are essentially fuel which was not burned during the combustion process or which has escaped into the atmosphere through fuel evaporation. The main sources of incomplete combustion are rich air/fuel mixtures, low engine temperatures and improper spark timing. The main sources of hydrocarbon emission through fuel evaporation on most vehicles used to be…
What is Hub?
Hub is a generic term for the area where a wheel is mounted. For instance, there are hubs for every wheel on your car.
What is Heater Valve?
The heater valve is controlled by the interior heating controls. When you turn on your vehicle’s heat, the valve opens and allows hot coolant to enter the heater core, which then warms the air entering your vehicle’s interior.
What is Hazard Relay?
The hazard relay controls the flashing of the hazard warning lights.
What is Heater Ducts?
The heater ducts are the tubes that connect the heater fan to the vents in your vehicle’s dashboard.
What is Heater Core?
The heater core is a miniature radiator that sits in the dashboard. When the heater is turned on, it opens the heater valve which lets hot coolant into the heater core, which then warms the air coming into the vehicle’s interior.
What is HVAC?
HVAC is a mechanic’s term for your car’s ventilation system. The letters stand for Heating, Ventilation, and Air-Conditioning.
What is Heater System?
The heating system warms the air brought into a vehicle’s interior. The heating system is connected to the cooling system and consists primarily of the heater core, heater valve, and, if equipped, a climate-control system.
What is Hydraulic circuit?
The hydraulic circuit is a closed system of tubes that contain hydraulic fluid. When pressure is applied at one end of the hydraulic circuit, it travels through the tubes to the other end.
What is Heater Fan?
The heater fan is the interior fan that controls the speed of air being introduced into the interior.
What is Head Gasket?
The head gasket seals the cylinder head to the engine block. It is subject to tremendous pressures, and often fails if and when an engine overheats.