Thanks guys, I have shown the garage the comments about the exhaust valves but they are now looking at the turbo. My cars been in for nearly 2 weeks now, hopefully have it back soon.

I have just noticed this reply. We have had the car in the garage a further 2 times and they changed the fly wheel only for the issue to come back a few months later. The car is now out of warranty so the garage dealing with it said I would have to pay for labour on any diagnostics. After a call wit...

Hi guys, any update on this issue. We have had ours to the vauxhall garage and they were unable to find anything. 8 months later its returned a lot worse to the point the car is basically un drivable. There is no a horrible ticking sound rattling away as well and it gets worse when changing gears. A...