How Everything Works on Instagram: "The Exact Moment Your Engine Comes to Life When you turn the key or press the start button, a small but powerful electric starter motor springs into action. It engages a tiny gear with the engine’s flywheel and delivers a burst of torque strong enough to rotate the crankshaft. As the crankshaft turns, pistons begin moving, drawing in air and fuel. A spark ignites the mixture, combustion takes over, and the engine becomes self-sustaining. In just a fraction of