its definately not the chain. its barely noticable but its not the chain. its like a muffled tapping or slapping and a whooshy sort of liquid sound, both very feint.

the clicking is one of the tappets or hydraulic lifters. the brainiacs at the sierra ownesr club all say that problem is a tappet and should be sorted with an oil flush and change as it only pipes up and makes a loud noise when i cain it in 1st out of roundabouts or down big stretches of road.