That's the oil separator, it removes most of the oil from the blowby and returns it to the crankcase. Probably the o-ring in the side tube (from the valve cover) is old and shrunk.


Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!