hi not sure if im in the right area.just bought the wife a 07 astra 1.8 sri vvt which seems to have a constant tapping noise when the cars running.any of you guys got any ideas on this as i dont think it should be tapping all the time.car is still under warranty but would be good to have an idea what it may be before i take it back to the vauxhall dealer thanks for any help on this 😉