Hi all, My focus has recently developed hissing sound when I turn it off. I can only hear it from outside, the first time I heard it I thought I had a punture as it comes from the front wheel area but on closer inspection I found it was coming from a grey cylinder which looks like an elongated oil filter located just behind the front bumper. There is a thin metal pipe with a torques type screw attached to it, there is a tiny leak of what appears to be water coming from here. Sorry for being a bit vague but it was dark so I couldn't get a proper look.
Any Ideas as to what the problem is?
TIA
Kevin Scott.