Tonya Pope writes:
 > I'm not sure where the 'black exhaust' really comes from, but I had a
The mechanic at Lehigh Valley VW had told me that the black smoke in
diesels is a definite sign of valves out of adjustment.

As of 3 months ago, when I last drove the '82 Diesel Westy, it did not
put out any black  smoke

Cetin