My 2010 Ford Focus zetec 1.6 Diesel Tdci sounds like it's hissing when it's cold. Once it's up to temp dissapears. I've only had the car a few weeks so is all new to me(cars in general).
The car drives fine apart from some kangaroo hopping in 2nd gear and pulling to the left(that will be for another post).
I have a video of the noise on youtube here: Ford Focus Noise Youtube
Any advice appreciated, it may be perfectly normal for a diesel engine but the only diesel engines I'm used to have been on fork trucks.