What is the Difference Between Timing Chain and Timing Belt?

The main difference between timing chains and timing belts lies in the materials used and their lifespan. Both timing belts and timing chains are essential parts of a car's internal combustion engine, responsible for controlling the crankshaft and camshafts, ensuring that the engine valves open and close at the correct time. Here are the key differences between the two:

• Material: Timing belts are made of rubber composite, while timing chains are made of metal.
• Lifespan: Timing belts typically need to be replaced every 55,000-90,000 miles, whereas timing chains can last as long as the vehicle itself.
• Cost: Timing belts are generally cheaper to manufacture and quieter in operation.
• Location: Timing chains are housed within the engine and receive lubrication from engine oil, while timing belts are located outside of the engine and tend to dry out and crack.

Timing chains were used first, but belts were introduced into vehicles in the 1960s due to their lower noise levels and cost. However, in recent years, more vehicle manufacturers have integrated timing chains back into some engines for their longer lifespan. Ultimately, whether a vehicle has a timing belt or chain depends on the specific engine design and the manufacturer's choice.

Comparative Table: Timing Chain vs Timing Belt

Here is a table comparing the differences between timing chains and timing belts:

Timing chains and timing belts both serve the same purpose in ensuring the synchronization of the engine's camshaft and crankshaft. However, they differ in terms of material, location, noise level, cost, longevity, and maintenance requirements.