The dealership just replaced the rear engine mount on my 4 cylinder 2001 Camry with 48,860 miles on it. (Was diagnosed due to very loud thud that occurred once every time the car was started.) They had the car for several days (wrong initial diagnosis, parts not in stock). A couple of days after i got it back, i checked under the hood and there is a lot of soot on many of the components. It is particularly noticeable on the fuel injector housing, the engine valve cover, etc., but it is all over everything. I can safely say that it was all pretty clean before i took the car in, since i did try to figure out what was causing the thud. I'm not sure whether the soot is still accumulating. Should i worry about this? The car doesn't seem to perform as well as it did.
As a side note, i now can't run the car with external air open - smells like repair shop.
Thanks!
-- margie