1999 Vectra noises

[peteyb12]

in a 1999 holden vectra, its got what appears to be tappet noise, if its not that what else could it be?
cheers

[DevilDRake]

For the people that can help, maybe you want to explain in depth? You could have a damn wheel loose just tapping that could be that sound to someone who has no idea.

[Tree cutter]

It could be just normal injector noise if it is not very loud. It could also be a timing belt that is falling apart and is ready to snap or it could be an idler pulley bearing on the way out.