Timing belt replacement

In a piston engine, either a timing belt or timing chain or set of timing gears is used to synchronize the rotation of the crankshaft and the camshaft. This synchronisation ensures that the engine’s valves open and close at the correct times in relation to the position of the pistons.


The phrase “timing belt” usually refers to a rubber toothed belt. The advantages of timing belts are typically a lower cost, reduced friction losses,[citation needed] less noise and that belts traditionally do not require lubrication. The main disadvantage is that belts wear over time, therefore belt replacement is recommended at specific intervals. Replacement of the engine’s water pump at the same time is often recommended, since the water pump is also subject to wear and easily accessed during the replacement of the timing belt.

FROM €250*

*price for the labour and do not include the parts

Timing belts are located typically located in front of the engine and are often behind a cover for protection against dust and debris. However a few engines since 2008 have used “wet timing belts”, whereby the belt is lubricated by engine oil to reduce friction. In some engine designs the timing belt may also be used to drive other components, such as the water pump and oil pump.

Timing chain replacement

Metal timing chains have become more widespread in car engines produced since the 1990s, due to the lack of the regular maintenance task of replacing a rubber timing belt. While the chains themselves are subject to minimal wear, lubrication of the chain or failure of the tensioner and chain guides can cause maintenance issues. Early symptoms of a timing chain system is becoming worn include a rattling noise from the front of the engine. Most pushrod engines, where the crankshaft and camshaft are very close together, use a short chain drive rather than a direct gear drive. This is because gear drives suffer from frequent torque reversal as the cam profiles “kick back” against the drive from the crank, leading to excessive noise and wear

FROM €350*

*price for the labour and do not include the parts