How to troubleshoot a strange noise coming from my Vauxhall Insignia's engine?

I've been noticing a strange noise coming from my Vauxhall Insignia's engine whenever I start the car. This noise seems to disappear after a few minutes of driving. What could be causing this and how can I fix it?

This could be due to a faulty or loose fan belt. I suggest checking the belt and tightening it if necessary. If the noise persists, it could also be a sign of a worn out alternator or water pump. It's best to get these checked by a mechanic to avoid any further damage to your car.

The strange noise could also be coming from a faulty air conditioning compressor. I recommend getting this checked and replaced if needed as a malfunctioning compressor can affect the overall performance of your car.

Another possible reason for the noise could be a worn out bearing in the engine. This can also create a very loud noise when starting the car. It's important to get this checked and replaced as soon as possible to avoid any potential breakdowns or accidents.