Why is my Ford Focus engine making a loud clicking noise?

I just bought a Ford Focus and noticed that the engine is making a loud clicking noise while idling. Is this a common issue or should I be concerned?

From my experience, this could be a sign of a loose belt or a faulty valve. I would recommend taking it to a mechanic to get it checked out.

It's possible that the noise is coming from a faulty spark plug or a damaged exhaust system. It's best to bring it in for a diagnostic test to accurately determine the source of the noise.

This could also be caused by low oil levels or old engine oil. Check your oil levels and consider getting an oil change if needed.