When I first got my car I was horrified at the big globs of RTV at the timing case/ block interface. I eventually learned of the infamous profile gasket issue. BMW issued a tech bullitin that said, in effect, "use tons of sealing adhesive when installing a profile gasket." I'm pretty sure my car was dealer maintained before I got it, and I think what I didn't like was actually the way it was supposed to be. I would suspect the profile gassket sealing before cracks in the block. Try to find the service instruction. I think I learned about it on bimmerdiy...