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Engine

Cylinder Head

The top section of the engine housing valves, ports, and often the combustion chamber.

Definition

Head design controls airflow, compression ratio, and cooling around the combustion chamber.

Porting, valve sizing, and multi-valve layouts are common performance upgrades.

Related terms

  • PistonA cylindrical component that moves up and down inside the cylinder, transferring
  • CrankshaftThe main rotating shaft that converts reciprocating piston motion into rotationa
  • CamshaftA shaft with lobes that open and close intake and exhaust valves at precise timi
  • Engine BlockThe main structural casting that houses cylinders, crankshaft bearings, and ofte
  • ValvetrainThe assembly of valves, springs, retainers, rockers, and camshaft that controls
  • Timing BeltA toothed belt synchronizing crankshaft and camshaft rotation in many overhead-c

Category: Engine · Updated August 31, 2026