Hi, my first post here, shame its because i have a problem..

I have a 1.6 tdci (2006) and i think i may have a problem with the injecter seal on cylinder number 4 (or number 1, its the one nearest the gearbox).

Looks like oil/fuel is pooling around the bottom of it. Also getting white-ish smoke on start up, which is getting worse and starting to stink the cabin out. It smells as far as i can tell like burnt diesel.

The car seems to run fine, pulls ok and mpg is the same as always.
Does this sound like the injecter seal to you guys?
And if so it as easy to change as the Haynes book reckons?

Thanks for any opinions,
Nick