Hyundai Glossary (S-Z)

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Hyundai Parts Glossary (alphabetical)  I-R listed on this page
D - H                  S - Z


Hyundai I-Beam Suspension

A suspension beam under the car that supports the body in the shape of a capital I.
Hyundai Idle Speed The speed of the engine at minimum throttle & the engine in neutral.
Hyundai Idler Arm A part of the steering system which helps to stabilize it by providing a pivot point for the left & right motion of the tie rod assemblies & the center link.
Hyundai Idler Arm Bushing The bushing that fits inside the idler arm.
Hyundai Idler Pulley A circular stationary pulley with a bearing which is used to assist a fan belt, drive belt or timing belt in running straight.
Hyundai Igniter An electronic device which supplies power to an ignition system.
Hyundai Ignition Coil A device which upon receiving a low amount of voltage, using a magnetic coil, creates a powerful spark which is used to start an engine & to keep it running.
Hyundai Ignition Control Unit An electronic device which receives, adjusts & then transmits voltage to the ignition system.
Hyundai Ignition Fire A wire with thick rubber insulation that carries the high voltage current from the ignition coil to the spark plug.
Hyundai Ignition Rotor A part inside the distributor cap whose function it is to receive a spark from the ignition coil via a cable & sequentially in the firing order , deliver spark to each distributor terminal, which then delivers a spark to each spark plug wire.
Hyundai Ignition System The system responsible for generating & distributing the electrical spark needed to ignite gas in the cylinders & for altering the frequency (timing) of that spark in relation to changes in engine speed.
Hyundai Ignition Timing The piston moves up & down in the cylinder (unless you've got a flat "boxer" engine, in which case it moves horizontally) to compress the air/gas mixture, which is then sparked by the--you guessed it, spark plug. The timing of that spark is critical; too soon or too late, & things stop working correctly, & in some cases bending & breaking.
Hyundai Ignition Wires Electric cables that receive a spark from an ignition coil via a distributor cap, or directly from an ignition coil, & then transmit a high voltage spark to the engines’ spark plugs.
Hyundai Imobiliser An electronic safety feature that prevents a car from being illegally driven away.
Hyundai IMSA International Motor Sports Association, founded by John Bishop in 1969. Sanctions, organizes, markets & officiates professional auto racing events.
Hyundai Inboard Air Jack A device added to some racing cars which raises their chassis after making a pitstop, so quicker action can be taken on their maintenance. It is powered by a compressed air canister.
Hyundai Independent Suspension A term used to refer to any type of suspension system that allows each of the two wheels of a given axle to move up & down independently of each other.
Hyundai Inflatable Tubular Restraint This tube of woven material is stiffer & stays inflated longer than a traditional airbag cushion. The tube protects the occupant's head & torso in a side impact, in part by keeping them away from the point of intrusion. The uninflated tube is tucked into the edge of the roof headliner. The tube is attached at the base of the A-pillar in front of the occupant, & at the roofline behind the occupant. When it inflates, the tube angles across the window to keep the occupants head from hitting the window glass or metal side pillar. Because of the longer time the tubular restraint stays inflated, it is expected to also offer protection in a rollover.
Hyundai Injectors Devices which receive gas at low pressure & shoot it into the engine cylinders at predetermined intervals under higher pressure.
Hyundai In-Line Engine Cylinders are arranged side by side in a row & in a single bank. Most four-cylinder & some six-cylinder engines are in-line engines. In V-6, V-8 or V-12 engines, the cylinders are divided into two banks, each of which is angled away from the other in a 'V' pattern.
Hyundai Installation the engine location maybe front, rear, or mid. If its mid or further back the car is rear-wheel drive. Its orientation maybe traverse or longitudinal.
Hyundai Intake Hose A hose, which is usually plastic that delivers outside air to the engine’s intake system.
Hyundai Intake Manifold A set of pipes, one for each cylinder, that carry the air/gas mixture to the cylinders.
Hyundai Intake Manifold Gasket The gasket that seals between the cylinder head & the intake manifold.
Hyundai Intake Valve A circular part with a stem usually measuring several inches long which is part of the combustion system. It allows oxygen to enter into the combustion chamber enabling the explosions to occur which creates combustion power.
Hyundai Intercooler Device that cools air as it leaves a turbocharger or supercharger before the air is blown into the engine air intake. Cooling makes the air denser & richer in oxygen, which lets the engine produce more power.
Hyundai Interior Payload The amount of space or material that can be carried inside the car.
Hyundai Intermediate Gear A gear which is used to indirectly drive a device such as an oil pump or injection pump.
Hyundai Jackknife The point at which the cab of an articulated lorry is overtaken by the trailer its pulling while still attached.
Hyundai J-Gate A metal plate with a J shaped whole, in which the gear-stick must slip between during gear changes.
Hyundai Journal The surface of a bearing against which a moving shaft turns.
Hyundai Jump Start To transfer electrical power from one car battery to another to enable the cars ignition system to startup, using jump leads.
Hyundai Keyless Entry A system for locking & unlocking doors of a car with a central locking system without using the key. Usually, the user manages the locks by pressing a button on a remote key-fob transmitter. Some cars have electronic combination locks on the doors near the handle.
Hyundai Kilometers Per Hour (KPH) Multiply by 0.621 to convert to miles per hour.
Hyundai Kit Car A car that is designed for assembly by the private hobbyist.
Hyundai Knocking A sound that occurs when the air/gas mixture is igniting too soon. It is usually caused by a poorly timed engine, the use of low octane gas, or the build-up of carbonb deposits on the piston tops. If your engine is "knocking," whether through repair or the use of higher octane gas, it needs to be addressed immediately.
Hyundai Lap-And-Shoulder Belt A safety belt that secures the driver and/or passenger in the seat with a continuous web of material which fits across the lap & crosses the upper body. It keeps the occupant from jerking forward in the event of a crash. Also called three-way belt, three-point belt, or three-point safety harness.
Hyundai Leaf Spring Suspension spring made up of several thin, curved, hardened-steel or composite-material plates attached at the ends to the car underbody. The curved shape of the plates allows them to flex & absorb bumps.
Hyundai Lean Fuel Mixture An air/gas mixture that contains an excessive amount of air in proportion to gasoline. This leads to higher exhaust gas temperatures, & is generally more dangerous to the health of your engine than an overly-rich mixture, though neither are desireable.
Hyundai Lean Or Rich Fuel Mixture The gas mixture is lean when it has too much air, & rich when it has too much gas. These terms can also be used to refer to adjustments the electronic control module makes to the gas mixture in response to various driving conditions, particularly on engines with variable-valve technology.
Hyundai Leg Room With the front seat adjusted all the way back, the distance from the accelerator pedal's heel point to the back of the front seat cushion.
Hyundai Lien A legally documented claim against a car by another party to which the car has been offered as security for repayment of a loan or other debt. A lien against the title may make it impossible to sell the car & transfer the title until the lien is cleared.
Hyundai Lift Gate The rear opening on a hatchback. Called a tailgate in Europe, or hatch door.
Hyundai Liftover The distance a person must lift an object off the ground to put it in a trunk, boot, or cargo bay.
Hyundai Limited-Slip Differential A device that helps prevent the drive wheels from skidding or losing traction by diverting power from the slipping wheel to the opposite wheel on the same axle.
Hyundai Litre Engine-displacement measurement, as in a 2.0-litre engine. The metric equivalent to the imperial measuring standard, which is largely favoured by American car makers. A Gallon is this other liquid volume standard, an contains 3.78541 litres.
Hyundai Live Axle A solid axle allowing movement of the wheel on one end to affect the opposite wheel. Found on older rear-drive cars & tucks. Also called a rigid axle.
Hyundai Loan to Value Ratio (LTV) Obtained by divided price or value into loan amount. A car with a £10,000 price & an £8,000 loan would have a loan-to-value ratio of 80 percent.
Hyundai Lock Up Torque Converter A torque converter that contains a special clutch that forms a solid connection between the engine output shaft & the transmission input shaft when a certain, pre-set speed is attained. This reduces transmission friction losses & increases efficiency.
Hyundai Lock-to-lock The amount of turns the steering wheel must rotated for the wheels to be turned from rightmost to leftmost. Eg - for the Mini Cooper its 2.5.
Hyundai Lowrider Generally, a car on which the chassis has been lowered; however, other customizations are often present. Some American cars have a hydraulic mechanism that does this action during driving.
Hyundai Lug Wrench A large cross-shaped wrench used to remove the lug nuts so that the tire may then be removed.
Hyundai M+S Rating A tyre rating which indicates a tyre designed to perform well in mud & snow.
Hyundai MacPherson Strut A suspension system that consists of a combination coil spring & shock absorber in one compact unit at each wheel. With this "independent" suspension design, road shocks at one wheel are not transferred to the opposite wheel. MacPherson struts use fewer parts, meaning a reduction on weight & fewer elements that could wear out.
Hyundai Main Bearings Thin semi-circular aluminum or copper parts used in pairs. One upper & one lower. These fit between the crankshaft & the main bearing journals.
Hyundai Maintenance Tune-up Replacement of the high-wear items like ignition parts (spark plugs & wires), air filters, gas filters, etc.
Hyundai Manifold Absolute Pressure(MAP) Sensor Detects engine load by measuring air pressure or vacuum in the intake manifold.
Hyundai Manual Transmission Manual transmission requires the driver of a car to press a clutch in order to change the “speed” of the car, or the speed of the engine in relation to the speed of the wheels. Varying these gears allows the right amount of power at the right speeds while driving.
Hyundai Mass air sensor A part that monitors & regulates air flow to the gas system. Mirror A reflective part that is used to enable a driver to see on either side or behind the car.
Hyundai Mass Airflow Sensor Device that measures the flow of air entering the throttle housing.
Hyundai Master Cylinder The primary part for pressurizing fluid in a hydraulic system. Used in the braking system, it supports a reservoir for holding brake fluid & is activated each time the driver depresses the brake pedal.
Hyundai Max Power Two figure totals given in brake-horse-power by engine revs per minute. [bhp x rpm].
Hyundai Max Torque The weight of force per foot, given in pounds, & the rpm level, eg 100 lb ft at 1000 rpm.
Hyundai Miles Per Gallon / MPG Fuel economy measurement. Generally, a car maker may offer mpg ratings for city driving, highway driving, & combined driving, so their is no definitive single measure overall.
Hyundai Motor Mount The rubber mounts which give cushion & reduces vibration between the engine & the frame.
Hyundai MSRP Manufacturer's Suggested Price. MSRPs do not include applicable destination charges, state & local taxes, license fees, optional equipment or special items or services.
Hyundai Muffler That part of the exhaust system that muffles or quietens & reduces the noise coming from the engine, located at center & or rear of the car.
Hyundai Multi-Link Suspension Independent suspension controlled with several link arms that restrict undesired motion of the suspension for a smoother ride & more precise handling.
Hyundai Multi-Port Fuel Injection (MFI) Multi-Port Fuel Injection uses individual gas injectors to spray gas into each intake port, bypassing the intake manifold.
Hyundai Negative Terminal The battery terminal that conducts electric current back to the battery on cars with negative ground. It is always marked with a'-' as opposed to the positive terminal '+'.
Hyundai Nitro-Methane A mixture of nitric acid & methane which is used to gas Top Fuel Dragsters & Hotrods; is also called nitro or top gas.
Hyundai Nose A small frontal body section of a car which extends beyond the bonnet line, typically slanting downwards. The narrower version used on Formula cars is called a shark-nose. 'Nosed' refers to the process of raising a small peak in the center of the bonnet of a car, usually as part of a customized design.
Hyundai Octane Rating A unit of measurement on a scale intended to indicate the tendency of a gas to detonate or knock based on the percentage of isooctane in the gas. The higher the rating, the higher the percentage of isooctane & therefore the greater the resistance to detonation offered by the gas.
Hyundai Odometer Indicates the number of miles a car has been driven, an is also called a Mileometer. It is illegal to tamper with the odometer reading. This illegal practice of rolling a car's odometer back to indicate that it traveled fewer miles than it actually has, is done by 2nd-hand sellers. Odometer Rollover occurs when the car's mileage exceeds the mechanical limits of the odometer - usually 99,999 miles. This must be certified by the seller, under law binding Mileage Acts.
Hyundai Ohm The measurement of resistance in an electrical circuit.
Hyundai Ohmmeter It may sound like something only a tech-geek could love, these simple devices read resistance in electrical circuits, which can basically tell you if many parts & sensors are functioning properly or not. Handier than an iPhone, & easier to use than a BlackBerry, a good rule of thumb is if your car is out of warranty, an ohmeter belongs in your garage.
Hyundai Oil cap A metal or plastic cap on top of an engine which is used to add engine oil when removed.
Hyundai Oil Cap Gasket A rubber gasket which seals an oil cap to a valve cover.
Hyundai Oil Dipstick A metal shaft which is submerged into a cars’ oil pan used to measure the crankcase oil.
Hyundai Oil Filter These are the most often replaced items on a car, so get familiar with them. As the name implies, they simply filter the engine's oil, & being as oil is the lifeblood of any engine, their job is crucial. Oil filters should be replaced with every single oil change--and you should strongly consider OEM-specific oil filters as well. It is a good idea to buy these in bulk if you change your own oil--with crush washers, of course.
Hyundai Oil Level Sensor An electrical sensor which uses a floating rheostat to monitor & report the current engine oil level.
Hyundai Oil Pan On the bottom of the engine, a cavity which holds the engine oil.
Hyundai Oil Pan Drain Plug A threaded plug at the bottom of an oil pan which enables the oil to be drained out & changed.
Hyundai Oil Pan Gasket The gasket that seals the oil pan to the engine block.
Hyundai Oil Pressure Switch An electrical switch that monitors & reports to a light or gauge, the engine’s oil pressure. If a light is used, the light will come on if engine’s oil pressure is dangerously low.
Hyundai Oil Pump The oil pump is used to pump oil to the engine. There are several types of oil pumps, but the most common are gear & rotary pumps.
Hyundai Open Circuit A circuit that is interrupted, such as by an open switch, a bad connection, or an internal break. Generally not a positve thing as far as your car is concerned.
Hyundai Optional Equipment Machines or features that can be added to a particular model which are not part of the standard package. These usually involve additional cost & can be ordered individually or as part of a package. A CD changer/jukebox is an example.
Hyundai Overdrive A transmission gear with a ratio below 1:1, which improves gas economy by reducing engine revolutions per minute at highway speeds. On a five-speed manual transmission, the fourth & fifth gears are overdrive. On a four-speed automatic transmission, the fourth gear is overdrive. When an overdrive gear set is engaged, the output shaft turns at a higher rate than the input shaft, reducing engine revolutions at cruising or highway speeds.
Hyundai Overhaul The process of rebuilding or replacing all of the major parts of an old, tired engine. Can be much cheaper than a new car, but it should be done by a mechanic who is truly qualified, lest your car turns into a money pit.
Hyundai Overhead Cam The type of valve train arrangement in which the engine's camshaft is mounted above the cylinder head(s). When the camshaft is placed close to the valves, the valve train parts can be stiffer & lighter, allowing the valves to open & close more rapidly & the engine to run at a higher RPM. In a single overhead cam (SOHC) layout, one camshaft actuates all of the valves in a cylinder head. In a dual overhead camshaft (DOHC) layout, one camshaft actuates the intake valves, & one camshaft operates the exhaust valves.
Hyundai Overhead Valve Engine (OHV) An engine with both intake & exhaust valves placed directly over the piston. In this design, the camshaft is located in the block, & the valves are actuated by pushrods & rocker arms.
Hyundai Oversteer Occurs when the rear tyres lose adhesion under cornering. In motor sports, this is also called loose. Oversteer can lead to a spin if the driver doesn't reduce acceleration. See also Understeer.
Hyundai Oxygen Sensor An emissions related device which senses the presence of oxygen in the exhaust. The voltage it puts out is interpreted by the main computer (ECM) along with other sensor input to determine automatic adjustment of the air/gas mixture.
Hyundai Package Shelf The ledge between the rear seat & the backlight (or rear windshield). The name is misleading because it's a bad idea to put anything on the package shelf. However, it often contains the sound system's rear speakers and, on some cars, the CHMSL or center brake light. Sometimes also called the package tray. On European cars the package tray often contains a first-aid kit; on higher-end models it may contain storage compartments.
Hyundai Parking Brake The parking brake is used when the car will be in one place for a long period of time. Rather than utilizing hydraulic pressure, a mechanical linkage is used for the brake shoes, & a steel cable pulls the tension levers. This draws the brake shoes firmly against the drums. This will hold the brake continuously in the applied position.
Hyundai Parking Pawl A small curved “catch” used in automatic transmissions so that when the car is placed in park, this lever prevents the car from rolling.
Hyundai Passive Restraint A device or structure that automatically helps restrain car occupants in an impact. This includes airbags, belt pretensioners, padded knee bolsters, & shoulder belts that are motorized, or attached to the door.
Hyundai Pinion A type of gear that has small teeth that mesh with other, larger gears.
Hyundai Pinion A gear with a small number of teeth designed to mesh with a larger geared wheel or a rack. Used in rack & pinion steering & the differential ring & pinion.
Hyundai Pinion Gear The smaller of two meshing gears. A pinion gear is used in a starter motor to engage the flywheel ring gear & also rides along the surface of the steering rack (hence "rack & pinion" steering).
Hyundai Piston A circular part that moves in an up & down motion in a cylinder bore, which together with the other pistons & the engines valves delivers power to the engine.
Hyundai Piston A partly hollow cylindrical part closed at one end, fitted to each of the engine's cylinders & attached to the crankshaft by a connecting rod. Each piston moves up & down in its cylinder, transmitting power created by the exploding gas to the crankshaft via a connecting rod.
Hyundai Piston Rings Metal rings seated in grooves on the outside of a piston that are used to ensure a proper seal between the piston & the cylinder wall. Typically, three (3) rings are used: two (2) ensure proper compression is produced & one (1) prevents oil from leaking into the cylinder.
Hyundai Pitch The up & down movement along an imaginary axis between the front & rear of a car. Often during hard braking, the car's nose will "dive" or pitch down in front. During acceleration the back end will "squat" or pitch down in the rear.
Hyundai Planetary Gears A gear set, generally found in automatic transmissions, in which all of the gears are in one plane, grouped around each other like planets around the sun. The central gear is called the "sun gear."
Hyundai Plenum Gasket The gasket which seals between the intake manifold & the plenum.
Hyundai Plies The layers of cord, fiberglass, steel or structural fabric that make up the tire carcass & reinforcing belts.
Hyundai Ply Rating A measure of the strength of tires based upon the strength of a single ply of designated construction. An eight-ply rating does not necessarily mean the tire has eight plies, but rather that the tires has the strength of eight standard plies.
Hyundai Positive Crankcase Ventilation Valve An emission device that routes oil pan vapors to the intake manifold to be burned during combustion. Also known as the PCV valve.
Hyundai Pound-Feet (LB.-FT.) Pound-feet measure twisting force or torque. Generated by the engine, torque is the "push" that sets a car into motion & accelerates it. Specifications charts usually include the maximum torque the engine can develop, & the RPM at which it is generated (such as 345 lb.-ft. @ 3200 RPM).
Hyundai Power Band A subjectively defined RPM range over which an engine delivers a substantial portion of its peak power. The power band usually extends from slightly below the engine's torque peak to slightly above its horsepower peak.
Hyundai Power Booster A device that uses engine vacuum to assist in braking.
Hyundai Power Brakes cars use power brakes so that drivers do not have to exert as much pressure to stop the car. There are four types of power brakes: vacuum-suspended, air-suspended, hydraulic booster, & electro-hydraulic booster. They work by allowing the pressure on the brake pedal to exert pressure onto a rod that is connected to the pistons of the two master cylinders which force fluid into the front & rear brake lines. Simultaneously, the brake-pedal positions the vacuum control valve to seal off half of the booster unit. This creates a low-pressure vacuum chamber. The atmospheric pressure in the control chamber applies more pressure on the pistons.
Hyundai Power Steering A steering system that uses a separate motor or engine power to reduce the effort necessary to turn the front wheels.
Hyundai Power Steering Belt A v-belt or serpentine belt used to drive a power steering pump.
Hyundai Power Steering Filter A filter, usually located inside the power steering pump, for the purpose of filtering particulate matter out of the power steering fluid.
Hyundai Power Steering Fluid Many power steering systems use hydraulic power. These systems use a power steering pump driven by a belt from the crankshaft. The pump moves fluid under pressure through hoses to the steering gear. The pressure is used in the steering gear to reduce steering effort. A reservoir for fluid is attached to the rear of the pump.
Hyundai Power Steering Pump A hydraulic pump used to pump power steering fluid through a closed system in order to keep the internal parts from being damaged from the heat that is generated.
Hyundai Power Steering Pump Repair Kit A kit containing seals,o’rings & washers used to rebuild or repair a power steering pump.
Hyundai Power Stroke Occurs when the piston is pushed down by the expansion of the burning air/gas mixture in the cylinder. It's called the "power" stroke because as the piston moves down on this stroke, it does so with great force, using the piston rod to push again on the crankshaft, which in turn rotates the axle(s), which move the car. Neat how that works, yes?
Hyundai Power-To-Weight Ratio The maximum power output of the car per unit mass. The higher the ratio, the more powerful the car. In comparing several cars, this can be a better measurement than engine horsepower or torque because it considers the weight variable. In other words, a car that seems to have a powerful engine but is also heavy may have less get-up-and-go than a car that has a similar or less powerful engine but also weighs less. Lotus are the best exponents of this. Given in a BHP per tonne value.
Hyundai Powertrain A name applied to the group of parts used to transmit engine power to the driving wheels. It can consist of engine, clutch, transmission, universal joints, drive shaft, differential gear, & axle shafts. Powertrain parts are matched according to driver needs such as high torque, gas economy, or convenience.
Hyundai Predetonation The undesirable "knock" or "ping" that occurs when the ignition of the air-gas mixture occurs before the ignition spark. Also known as "pre-ignition".
Hyundai Pressure Plate One of the major parts of the clutch assembly, the pressure plate is forced by springs against the clutch disc which then causes the engine's power to be transmitted to the various gears of a manual transmission.
Hyundai Pretensioner A device that rapidly yanks in shoulder-belt slack when a crash sensor detects an impact. Some pretensioners are activated by a small explosive charge in the belt retractor; some contain their own inertial sensors. So far, pretensioners are still found on more expensive models, particularly those by European manufacturers. By pulling in belt slack within milliseconds of an impact, pretensioners help reduce chest & head injury by restricting occupant motion & preventing the occupant from hitting the belt.
Hyundai Projector-Beam Headlights A headlight that uses a spherical reflector to tightly control the light beam. The bulb or light source directs the light inward, toward the reflector at the back of the headlight assembly, which then projects it forward from the car. These lights are more powerful, accurate & expensive than standard sealed-beam & halogen headlights, & are generally found on sport & luxury models.
Hyundai PSI Acronym for pounds per square inch. A pressure measurement used in tyre inflation & turbocharger boost.
Hyundai Pushrod A general term for any rod that transfers force in compression. In a conventional overhead valve layout, pushrods are used to transfer reciprocating motion from the cam followers to a more distant part of a valve train, typically the rocker arms. Pushrods are eliminated in overhead camshaft designs.
Hyundai Quarter Panel Sheet of metal panel that covers the front & rear quarters of the car.
Hyundai Quarter Panel A sheet metal panel that covers the area from the rear-door opening to the taillight area, & from the bottom of the surface to the base of the roof, or from the headlamp area to the front-door opening, & from the bottom of the surface to the base of the hood.
Hyundai Quartz Halogen Headlamps A headlamp bulb having a quartz envelope holding the tungsten filament & filled with an inert gas containing iodine or another of the five halogen gases. The gas serves to remove the tungsten deposits from the bulb wall & redeposit them on the filament, preventing blackening of the bulb surface & reduction of light output. This kind of cycle requires very high filament operation temperatures which necessitates the use of quartz instead of glass. These lamps produce more lighting power per watt of electrical power than standard sealed beam headlamps.
Hyundai Quenching The rapid cooling of hot metal by contact with liquids.
Hyundai R-134a The environmentally safe refrigerant now used in air-conditioning systems. It requires a slightly bulkier condenser unit than the older R-12 type. cars equipped with R-12 systems can be converted to use R-134a. Since Freon is now banned, expensive & hard to obtain, the conversion may be a good idea when an R-12-based system needs recharging, particularly if technicians detect a leak.
Hyundai Rack & Pinion A steering system in which a round pinion gear turns against teeth cut out of a flat rack.
Hyundai Rack & Pinion Steering The steering wheel is connected to a pinion gear that meshes with a toothed bar, also called a rack or linear gear. As the pinion turns, the rack moves side to side, moving the steering linkage & causing the front wheels to turn left or right. The ends of the rack are linked to the steering wheel with tie rods.
Hyundai Radiator The radiator dissipates the heat from the engine. It holds water in tubes, providing a large area in contact with the atmosphere. There is a core, tubes, a large cooling area, a receiving tank, & a dispensing tank.
Hyundai Radiator Fan Motor A cooling fan motor which gives the radiator additional cooling when the coolant reaches a certain temperature.
Hyundai Radiator Mounts Rubber mounts used to cushion & insulate between the radiator & the radiator frame.
Hyundai Ram Tubes Tubes in the intake manifold that promote performance at certain engine speeds by 'ramming' air into the cylinders.
Hyundai Rear Axel Assembly The drive shaft turns (spins) a set of gears within the rear axle assembly known as the differential, or rear differential. The differential changes the direction of power from the driveshaft out to the rear wheels via the rear axle.
Hyundai Rear Glass Seal The weatherstripping around the rear glass that seals out air & water.
Hyundai Rear-Wheel Drive (RWD) The drivetrain in which power is applied through the rear wheels only.
Hyundai Recall A manufacturer calls in cars to repair defects, usually safety-related. Recalls may be voluntary, requested by the government, or mandated by NHTSA.
Hyundai Receiver Drier A round metal cannister that contains desiccant & uses it to remove small amounts of moisture & particulate matter from AC refrigerant.
Hyundai Recharge As in to recharge a battery, which means to restore its dissipated electrical energy.
Hyundai Recirculating Ball A steering mechanism in which the steering shaft turns a worm gear causing a toothed metal block to move back & forth, turning the front wheels. Ball bearings reduce friction between the worm gear & the metal block.
Hyundai Reference Sensor An electrical sensor which reports the position of a camshaft or a crankshaft to an on-board computer for the purpose of ensuring that an engines’ valve timing is correct.
Hyundai Relay An electromechanical switch which manages electrical loads.
Hyundai Release Bearing Working with the pressure plate, when the clutch pedal is depressed , disengages the pressure plate & clutch disc & reengages them when the pedal is allowed back up.
Hyundai Release Fork Disengages the clutch disc from the flywheel by pressing on the pressure plate release springs.
Hyundai Resistance Measured in ohms, & an assessment of a circuit's resistance to "promote" electricity, the resistance of many automotive parts that operate electrically & electronically can help you assess that part's general health. If resistance is too low or too high, it is generally "broken," or otherwise out of specification.
Hyundai Resonator A small auxiliary muffler that assists the main muffler in reducing exhaust noise.
Hyundai Restrictor An electronic safety device preventing high-speeds above 160mph from being reached.
Hyundai Rev Counter Usually sits near the Speedometer. Shows the driver the rpm level while pressing the accelerator, thus indicating how much gas maybe unnecessarily be being burned.
Hyundai Revolutions Per Minute (RPM) Describes at which speed the engine crankshaft is turning.
Hyundai Rim The outer edge of a bare wheel. A hub-cap sometimes sits within this.
Hyundai Ring-and-Pinion Gear Any gear set consisting of a small gear (the pinion gear) which turns a large-diameter annular gear (the ring gear). Used in rear-drive differentials (rear ends) to transfer power from the driveshaft to the axle & wheels.
Hyundai Rocker Panel The body panel that runs beneath a car's doors.
Hyundai Rod bearings Thin semi-circular aluminum or copper parts which are used in pairs. An upper “shell” & a lower shell. These fit inside the connecting rod, between the connecting rod & the rod journal on the crankshaft.
Hyundai Rolling Radius Tire-rolling radius is the distance from the center of the wheel to the road. Static radium applies when the car is standing still. Dynamic rolling-radius described wheels in motion. The latter is used to measure tire revolutions per mile & is usually slightly higher than static radius.
Hyundai Rolling Resistance This is motion resisting force that is present from the instant the wheels begin to turn. On normal road surfaces, rolling resistance decreases with increased tire pressure & increases with car weight. Rolling resistance can also be affected by tire construction & tread design.
Hyundai Rotor The rotating part of a machine or mechanism. The brake disc itself is referred to as a "rotor," as is the center of a distributor or starter motor.
Hyundai Run on A situation in which an engine continues to run for a few seconds after it is shut off (also called 'dieseling').
Hyundai Running Board A strip running between the fenders & below the doors of early autos used both as a step up into the car & to wipe the mud from one's feet.


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Hyundai Parts Glossary (alphabetical) I-R listed on this page
D - H S - Z