Why is my Vauxhall Astra making strange noises when I turn it on?

I recently purchased a Vauxhall Astra and I've noticed that when I turn it on, there is a strange noise coming from the engine. It sounds like a loud clicking or ticking noise. I'm not sure if this is normal or if something is wrong with my car. Any advice would be greatly appreciated.

It's possible that your engine has a loose part or the oil needs to be changed. I recommend taking it to a mechanic for a thorough inspection.

I've had the same issue before and it turned out to be a faulty belt tensioner. You should have it checked out as soon as possible before it leads to bigger problems.

It could be a problem with the fuel injectors or spark plugs. These can get clogged or worn out over time and can cause strange noises. Have a mechanic take a look at it.

I had a similar issue and it was due to low oil levels in my car. Make sure to check your oil regularly and top it up when needed to avoid any potential engine damage.