I did notice that the owner is running a single central speaker with a 6x4 speaker - maybe this needs to be upgraded?
Depending on if the engine already had the clutch fitted or not I guess that would have been the first thing I would have checked before ripping the rest of the engine apart.
Vitwagen - it sounds a lot like that.....a replacement pump would be good It's a 1.6 TD fitted into a caddy mk1 that was 1.6D