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.

Your Answer

Add photo

Related Questions


Looking for a Used 300-Class in your area?

CarGurus has 180 nationwide 300-Class listings and the tools to find you a great deal.


Search Mercedes-Benz 300-Class Questions

Mercedes-Benz 300-Class Experts

#1 James Ramond
James Ramond
Reputation 240
#2 Tom Demyan
Tom Demyan
Reputation 210
Reputation 180
View All

Related Models For Sale

Used Mercedes-Benz C-Class
477 Great Deals out of 28,695 listings starting at $1,499
Used BMW 3 Series
974 Great Deals out of 33,361 listings starting at $1,000
Used Mercedes-Benz SL-Class
43 Great Deals out of 2,978 listings starting at $2,900
Used Mercedes-Benz G-Class
11 Great Deals out of 1,131 listings starting at $22,990
Used BMW 5 Series
497 Great Deals out of 15,200 listings starting at $1,999