When replacing a timing belt, many experts and vehicle manufacturers recommend that what other part(s) should be replaced?

Replacing a timing belt often involves considering the longevity and reliability of other components in the timing system. Many experts and vehicle manufacturers recommend replacing not only the timing belt itself but also related tensioners, pulleys, and sometimes the water pump.

The reasoning behind this recommendation centers on the synchrony and interconnectedness of these components. The timing belt operates with tensioners and pulleys to maintain correct timing in the engine. Over time, these parts can wear out or become less effective, which may lead to premature failure of the timing belt or issues with engine performance.

Additionally, if the water pump is driven by the timing belt (as it is in many engine designs), replacing it during timing belt service can prevent potential failures later on that would require another labor-intensive disassembly to access the belt again. This proactive approach helps to ensure that all crucial components in the timing mechanism are fresh, minimizing the risk of breakdowns or repairs shortly after a timing belt replacement has been performed.

Thus, replacing the timing belt alongside related elements such as tensioners, pulleys, and in some cases, the water pump, is a common best practice in automotive maintenance.