A timing chain *can* fail, though it's less common than a timing belt failure. You should have it inspected by a mechanic if you notice any of these symptoms:
* Unusual engine noises: A rattling or clicking sound coming from the engine, especially when starting or accelerating, could indicate a stretched or failing chain.
* Engine misfires or rough running: A stretched or damaged chain can affect the timing of the valves, leading to misfires.
* Check engine light: While this could be many things, a timing chain issue can trigger this light.
* Engine performance issues: Loss of power or noticeable decrease in engine performance could be a sign of a problem.
Instead of a scheduled replacement, a 2008 Chevy Impala's timing chain should be checked during routine maintenance inspections or if you notice any of the warning signs above. A mechanic can assess its condition and determine if replacement is necessary. Simply put, you replace it when it's needed, not on a predetermined schedule.
