What could be causing unusual engine noises in my Vauxhall Insignia?

I have noticed strange noises coming from my Vauxhall Insignia's engine. It sounds like a knocking sound when I accelerate. What could be the potential cause of this and how can I fix it?

If the noise is more of a rattling sound, it could be due to a loose exhaust heat shield. This is a relatively easy fix and can be done at home with a few basic tools. However, if you're not confident in your DIY skills, it's best to have a mechanic take a look.

It's possible that there could be an issue with the engine's timing chain. It may need to be replaced or adjusted. I recommend taking your car to a trusted mechanic to diagnose and fix the issue.

Another potential cause could be worn out engine bearings. These may need to be replaced to get rid of the noise. I suggest getting a professional opinion as soon as possible to prevent further damage to your car's engine.