toothed belt

A toothed belt, also known as a timing belt, is a crucial component in vehicle engines. It connects the camshaft and crankshaft, ensuring the precise coordination of the engine's valves opening and closing.1

Unlike other belt drives that rely on friction, toothed belts have evenly spaced teeth that fit into matching grooves on pulleys. This design provides a positive drive, meaning there is no slippage, which is essential for timing critical engine functions. However, this also means they lack the overload protection found in other belt types. Despite being smaller and less expensive than major engine parts, timing belts are vital for a vehicle's operation and typically require replacement around 105,000 miles.21