Well a few weeks on and the problem is still ongoing, I have since found out that there is a lack of compression on cylinder 4 so I have got my self a recondtioned head from wigan engines £295 with new valves, cams, pressure tested and skimmed bargin I think, anyway I am replacing it next week can anyone tell me what the torqe settings are for the head bolts and has anyone got the timing belt diagram?