first of all, its got 80000 on the clock so it quite high milage. its not an injector type noise yes there noisy but not more than any other st170, its definitely a ticking noise that increases with the rpm, will have to wait til the weekend and i'll post a video up. if it is the tappets how much does it cost to replace them anyone got any ideas? is it a job i can do myself or would it be best getting someone to do it.

the oil i used was part synthetic 5w30, i've also tried that Jayes hydralic lifter and its had no effect. was going to try an engine flush at the weekend and do the oil again.

any help greatly appreciated,