Hi
@carbore
Thanks for replying. I went back to pulling things apart until I could see anything at all. The bottom and the top of the pipe were fine but the hose connecting the header tank to the housing was weeping badly. It can be seen seeping on bottom of the C-clip of the main pipe. This made me think that it was indeed the death pipe having been messed with lastly. The hose looks fine but maybe I did not do the clip tight enough. It was a pretty consistent leak even without any pressure inside the system so it must be that. I dread the though of it being anything else.
Thanks again.
Evros