Combustion engine

Pistons throbbing in a steady rhythm with valves ticking, the core engine bed for a workshop, a factory or a mech in a game.

A slow thump on every firing stroke with a rattling pipe, for water pumps, old boats, farm machines or a lawn mower.

Hard knocking over a deep rumble, for tractors, boats, trucks parked up or a generator room in an industrial scene.

The pitch dropping and straining as the engine bogs, then pulling back up, for a winch, a climb or a machine pushed too hard.

An uneven run with skipped beats and exhaust coughs, for a failing motor, a broken-down boat or a getaway gone wrong.

Fast mechanical ticking and a whirring belt over a muffled rumble, the close-up of a mechanic working with the hood up.