Okay, so I have on 08 Cooper S with a lovely oil leak.

At first it looked as if it was the oil pan, but I pulled wheel and had it running and noticed the oil seemed to be coming from where the pulleys are. Of course you cannot see up there to what it actually is, but I am assuming the crank pulley seal is leaking. My question is, is this an engine out kind of job? I really can't stand my local Mini dealer (than again, who can?). However, my father and I are very mechanically inclined, we do a lot of work with formula cars we race, so we aren't completely useless with cars. Basically, my question is, how hard would the job be and how would we do it?