Date registered: Oct 2011
Vehicle: 1979 240d
Location: San Diego, Ca
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Oil on the hood...blow by?
I bought this 1979 240d over the summer from a man who used it as a daily driver. I commuted every other week in it about 30 miles round trip/day with no problems whatsoever, didn't even smoke. The vehicle continues to run very well (albeit slowwww!).
I started noticing small streaks of a dark black substance creeping up the hood a few weeks ago. I popped the hood saw that there was a decent amount of residual oil at the air intake hose/tube over the passenger head light, not pooling, but like soot, covering lots of that front passenger side near the headlights. I cleaned it up, checked the air filter housing - and while there as a sooty covering of oil around the inside, there was no standing oil (I don't have the oil bath type of filter). I also was low by about 2 quarts of oil so I topped it off as well.
After the next freeway drive the same thing happened, oil on the hood. I have resorted to placing paper hand towels around the air intake opening to prevent the oil from creeping out. The car progressively began to smoke more and more whitish smoke when starting and sitting at lights.
Is this excessive blow by? Air filter replacement? I noticed the previous owner had clipped and sealed off a hose attachment on the top of the air filter housing (the only one there, other than that which goes to the valve cover) is this a problem? Many thanks!
(I have been searching on this topic for weeks now and have not heard of another case like this)