A car engine part is composed of many components, including a FAN (3 letters), HOSE (4 letters), crankshaft (10 letters), piston (6 letters), fanbelt (7 letters) and radiatorcap (11 letters). The FAN helps to cool the engine by circulating air, while the HOSE carries fluids such as oil and coolant. The crankshaft converts the up-and-down motion of the pistons into rotational motion, and the fanbelt connects the crankshaft to the FAN. The radiatorcap regulates the pressure in the radiator, which helps to keep the engine cool.