The vacuum pump on these models had a rubber diaphram. When it gets a hole in it, the vacuum produced sucks engine oil through, and it vents into the intake. Having the car pointed down at the front makes this worse, as the oil from the valve train runs down the front side of the chain case then. You can suck all the oil out of the engine and sieze it up if you don't watch it.

Easy fix, just remember to use the locktite on the center screw, or it will come out and pucture the diaphram again.

The air in the fuel is a leaking suction line. Cut it off and replace with a new hose. The old one is crimped on, I think, to a screw fitting. Common problem, and if not fixed will prevent starting eventually.

BTDT on both items.

Later vac pumps vent back into the crank case, and by 1980 or so were piston type rather than diaphram, so those models won't pull oil like that.

Peter

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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!