Has anybody had "smoke" in the exhaust of a 300SD 1992, after a full engine repair?

Asked by Sep 08, 2014 at 11:04 PM about the 1992 Mercedes-Benz 300-Class 4 Dr 300SD Turbodiesel Sedan

Question type: Maintenance & Repair

After doing a full engine repair (by a very competent) mechanic, there is a significant
amount of "smoking"... and oil comsumsion..??

3 Answers


You can expect a little smoke and some oil consumption for the first 3 to 500 miles then it should start to taper off. Do you know what kind of rings he put in it ie chrome molly, plasma, etc.

That's exactly what he told me, and we were hoping for, but after about some 20 K miles, still consumes about 1 QT of oil per full tank of diesel. Do not know about the rings...Engine is strong and fast to take off too...but the smoke, do you think it could be the Vacuum Pump.. don't have a clue...I appreciate and value your opinion, THANKS.


If this has been going on for 20K something is wrong with rebuild and should have been taken care of before 1500 miles. When you stated recent it usually means within the normal break in period.

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