Why is my Vauxhall Insignia's engine making a rattling noise at high speeds?

I recently purchased a used Vauxhall Insignia and I've noticed a strange rattling noise coming from the engine when I reach high speeds. I've checked the oil levels and they seem to be fine. What could be causing this noise and how can I fix it?

It sounds like the issue could be a loose belt or a problem with the timing chain. I would recommend taking it to a mechanic to have it checked out and repaired if necessary. It's always better to address these issues early on to prevent any further damage to your engine.

I had the same problem with my Vauxhall Insignia and it turned out to be a faulty exhaust manifold. I would suggest getting it checked out by a mechanic as soon as possible before it causes any further damage.

In my experience, rattling noises at high speeds can also be caused by a failing fuel pump. You should have it checked by a mechanic to confirm and replace it if necessary.