It's almost three years since this one was in driving condition - here's an old picture of a clean car back then:

And now:

Older pictures can be seen in my Picasa album and newer ones in flickr.

2018-06-29: Some cleaning of the engine block and removal of surface rust, seal cover with new seals. I also cleaned the oil pump intake filter and put it back on its place. It wasn't that bad, but since the oil sump was off I thought it would make sense to clean it.