Engine accessories

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  • Other Engine Components in this Group:
    • ​Piston & Cylinder Liners: The piston translates combustion expansion into linear motion; liners (wet or dry sleeves) provide a durable, replaceable inner wall for the piston to travel inside.
    • ​Engine Valves: Intake valves admit the air-fuel mixture (or fresh air), and exhaust valves purge burned exhaust gases out of the cylinder.
    • ​Head Gasket & Seals: Prevents coolant, engine oil, and cylinder compression from leaking or cross-contaminating at the block-to-head interface.

​2. Air, Oil, Fuel, and Vehicle Filters

  • ​Air Filter: Traps airborne dust, dirt, and debris before air enters the engine intake system.
  • ​Oil Filter: Filters out metal shavings, carbon deposits, and contaminants from circulating engine oil.
  • ​Fuel Filter: Removes dirt, rust, and water from the fuel system before it reaches injectors or the carburetor.
  • ​Cabin Air Filter: Cleans heating, ventilation, and air-conditioning (HVAC) air entering the passenger cabin.

​3. Brake Valves, Relay Valves, & Air-Brake Accessories

  • ​Air-Brake Valves & Foot Valves: Regulate compressed air flow to apply or release air brakes on heavy commercial vehicles.
  • ​Relay Valves: Speed up the application and release of rear/trailer brakes by routing high-volume air directly from reservoirs to brake chambers.
  • ​Air Dryer & Governor: Removes moisture and oil contaminants from the compressed air system while governing peak reservoir pressure.
  • ​Brake Chambers & Slack Adjusters: Convert pneumatic air pressure into mechanical braking force applied to brake shoes/pads.

​4. Cooling-System Components

  • ​Radiator: Heat exchanger that cools engine coolant using airflow passing through its fins.
  • ​Water Pump: Circulates coolant continuously throughout the engine block, cylinder head, and radiator.
  • ​Thermostat: Heat-sensitive valve regulating coolant flow to maintain optimal engine operating temperature.
  • ​Cooling Fans & Hoses: Electric or clutch-driven fan assemblies and flexible high-temperature rubber hoses connecting the engine to the radiator.

​5. Belts, Tensioners, Bearings, Seals, & Repair Components

  • ​Timing & Serpentine Belts: Drive essential engine accessories (alternator, water pump, power steering) and synchronize crankshaft/camshaft rotation.
  • ​Belt Tensioners & Idler Pulleys: Maintain consistent belt tension to prevent slippage and premature wear.
  • ​Engine Bearings (Main & Rod Bearings): Provide smooth, low-friction rotational surfaces for the crankshaft and connecting rods.
  • ​Oil Seals (Crankshaft/Camshaft Seals): Prevent high-pressure engine oil from leaking out around rotating shafts.

​6. Electrical Sensors, Switches, Lighting, & Accessories

  • ​Engine Sensors: Crankshaft/Camshaft Position, MAF (Mass Air Flow), MAP, Oxygen (O2), Coolant Temperature, and Oil Pressure sensors.
  • ​Lighting: Headlights, taillights, brake lights, fog lights, and turn signals.
  • ​Relays & Switches: Ignition switches, brake light switches, safety relays, and fuse blocks controlling vehicle electrical loads.

​7. Clutch, Transmission, Suspension, & Steering

  • ​Clutch Assembly: Friction disc, pressure plate, and throw-out bearing to engage/disengage engine power to manual transmissions.
  • ​Transmission Components: Gears, shafts, synchros, torque converters, and control modules for manual and automatic transmissions.
  • ​Suspension System: Shock absorbers, struts, coil springs, control arms, bushings, and sway bar links for ride stability and dampening.
  • ​Steering System: Power steering pump/rack, tie rod ends, drag links, and ball joints translating driver input to vehicle wheel direction.

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