Why is my Vauxhall Astra's engine making a loud clicking noise?

I have noticed that my Vauxhall Astra's engine is making a loud clicking noise. It seems to be coming from the top of the engine. What could be causing this and what should I do to fix it?

This could be a sign of an issue with your engine's valves. It's important to have this checked out by a professional mechanic as soon as possible, as it can lead to further damage if left unchecked.

Make sure to check your engine oil levels and change your oil regularly. Low oil levels can cause excess friction and lead to clicking noises. If the noise persists, it's best to have a mechanic take a look.

It's possible that there is an issue with your spark plugs. They may need to be cleaned or replaced. It's best to have a professional mechanic inspect them to ensure proper functioning of your engine.