I have a Zafira GSI Z20LET now I have got an leh turbo fitted. But I have recently had a water leak from one of the pipes that goes into the bottom of the turbo. I removed the turbo fitted new copper washers and replaced the turbo. But I have noticed since doing this job that I have developed a ticking noise. Also there is a sign of oil in my intercooler pipe which I noticed when I removed the turbo. Am I looking at a new set of lifters or could it be something else?