Having a basic understanding of a mechanics glossary can help car owners navigate repairs, routine maintenance, and conversations with mechanics more confidently. Read this post by DFW Distributor in DFW Area to learn more.

Understanding automotive terminology can help car owners communicate better with mechanics, make informed decisions about vehicle repairs, and avoid unnecessary expenses. Whether you’re a beginner or a car enthusiast, this mechanics glossary covers essential terms every driver should know.

Having the right products can help you be a responsible driver. Call DFW Distributor in DFW Area at (817) 821-2533 or visit AMSOIL's online store to find what you need for your vehicle’s maintenance.

Mechanics Glossary

ABS (Anti-lock Braking System) – A safety system that prevents wheels from locking up during sudden braking, improving control and reducing the risk of skidding.

Air Filter – A component that removes dirt, dust, and debris from the air before it enters the engine. A clogged air filter can reduce performance and fuel efficiency.

Alternator – A device that generates electricity to charge the battery and power the vehicle’s electrical systems.

Ball Joints – Pivot points connecting the control arms to the steering knuckles, allowing smooth movement of the suspension.

Battery – A rechargeable component that supplies electrical power to start the engine and run electrical accessories when the engine is off.

Brake Pads – Friction materials that press against the brake rotors to slow or stop the vehicle.

Brake Fluid – A hydraulic fluid that transfers force from the brake pedal to the brake calipers.

Camshaft – A rotating shaft that controls the opening and closing of engine valves.

Catalytic Converter – An emissions control device that reduces harmful gases in the exhaust.

Coolant – A fluid that regulates engine temperature and prevents overheating. It circulates through the radiator and engine to absorb heat.

CV Joint (Constant Velocity Joint) – A flexible joint in the drive shaft that allows smooth power transmission to the wheels.

Differential – A gearbox that allows the wheels to rotate at different speeds, essential for smooth cornering.

Dipstick – A metal rod used to check engine oil levels.

Drive Belt – A belt that transmits power from the engine to accessories like the alternator, power steering pump, and air conditioner.

Engine Control Unit (ECU) – A computer that manages engine performance, fuel injection, and emissions.

Exhaust Manifold – A component that collects exhaust gases from the engine and directs them into the exhaust system.

Fuel Filter – A device that removes dirt and contaminants from the fuel before it reaches the engine.

Fuel Injector – A nozzle that sprays fuel into the engine for combustion.

Gasket – A sealing material used between engine components to prevent leaks of oil, coolant, or gases.

Gearbox (Transmission) – A system of gears that transmits power from the engine to the wheels.

Horsepower (HP) – A unit of measurement for engine power. Higher horsepower generally means better acceleration and performance.

Hydraulic Fluid – A liquid used in power steering and brake systems to transmit force efficiently.

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Ignition Coil – A component that converts battery voltage into the high voltage needed to ignite the fuel-air mixture in the engine.

Idle Speed – The engine speed when the vehicle is not moving.

Mass Airflow Sensor (MAF Sensor) – A sensor that measures the amount of air entering the engine to adjust fuel delivery.

Motor Mounts – Brackets that secure the engine to the vehicle’s frame.

Motor Oil – It’s a lubricant that reduces friction between moving engine parts, helping to prevent wear and overheating. It also cleans, cools, and protects the engine by removing contaminants and maintaining optimal performance.

Odometer – A gauge that records the total miles driven by a vehicle. High mileage can indicate increased wear and potential maintenance needs.

Oxygen Sensor (O2 Sensor) – A sensor that monitors oxygen levels in the exhaust to help regulate fuel efficiency and emissions.

Power Steering Pump – A hydraulic pump that assists with steering effort.

PCV Valve (Positive Crankcase Ventilation Valve) – A valve that regulates engine blow-by gases to prevent buildup of harmful emissions.

Radiator – A heat exchanger that cools the engine by dissipating excess heat.

Rotor (Brake Rotor) – A metal disc that brake pads clamp onto to slow or stop the vehicle.

Serpentine Belt – A single belt that drives multiple engine accessories.

Shock Absorbers – Components that control suspension movement for a smoother ride.

Spark Plug – A device that ignites the air-fuel mixture in the engine.

Thermostat – A valve that regulates engine temperature by controlling coolant flow.

Torque Converter – A component in automatic transmissions that transfers power from the engine to the transmission.

Vacuum Hose – A tube that carries air and pressure in the engine.

Valve Cover Gasket – A seal that prevents oil from leaking out of the engine’s valve cover.

Wheel Alignment – The adjustment of wheel angles to ensure proper tire contact with the road.

Water Pump – A component that circulates coolant through the engine.

Call DFW Distributor in DFW Area at (817) 821-2533 or visit AMSOIL's online store to place an order for the products that will guarantee your vehicle performs good as new for a lot longer.