| A round hole in the engine block for the piston. | |
| To cool a vapor to below its boiling point, where it then condenses into a liquid. | |
| A door in the heating and air conditioning system that controls the temperature of the air going into the passenger compartment. | |
| Gear assembly that transmits power from the driveshaft to the wheels; allows the outside wheel to turn faster than the inside when cornering. |