Why is my Ford Focus engine making unusual noises?

I just bought a used Ford Focus and it's been making some odd noises when the engine runs. It kind of sounds like a clicking noise. What could be causing this and should I be concerned?

It's not uncommon for older Ford Focus engines to develop a clicking noise. This is usually due to a lack of lubrication in the valve train. The best course of action would be to have a mechanic check it out and possibly replace the valve train components.

I had the same issue with my Ford Focus and it turned out to be a loose spark plug. Definitely get it checked out to avoid any potential engine damage.

I've been a mechanic for over 20 years and I see this issue often with older Ford Focus models. It's usually a sign that the engine needs some maintenance, so make sure to keep up with regular tune-ups.