With the increase of revs the ticking gets louder and faster, had a chap by me have a look and do a compression test on it for me all 4 were reading about 190psi and holding pressure too, he then did the screwdriver on the cam cover (front) where we could here that no:2 had the really bad ticking on the front cam, hold the screwdriver to number 1 and you could here the distant ticking but miles quieter.
He said its the oilways for the hydraulic lifters as they can get blocked up easy and clogged, I am hoping this is the scenario rather than bent valves etc etc, doesn't seem to be down on power as it still pulls very well indeed.
Cambelt was done by previous onwer about 8k ago, oil is cams racing oil.
Can anybody enlighten me before I jump in have the lifters done if its something else