I have an '83 240D that is beginning to drip oil from the engine block.
The block is wet below and to the front of the injectors, looking from the
left side of the car. The block area behind the injectors is dry. The area
of the block, around where the dipstick pipe is, is wet and that continues
down to the drain plug.
On the other side of the block, there is a wet spot in front of the exhaust
manifold and just behind where the cooling water enters and leaves the
engine. This wet spot continues down to the lower oil pan.
I think there are at least three main gaskets on the engine - one under the
box where the valves are (that one is almost new), one between the upper and
lower oil pan and a third on top of the upper oil pan. It seems to me that
replacing the gasket between the two parts of the pan would not be
difficult. The third one needs the upper pan to be removed which means that
the car may need to be raised quite a bit from the ground.
Any recommendations on the best additive, including antifreeze, to preserve
the radiator system?