I am fairly new to Diesels. I have a 1983 300SD and it idles pretty ruff. It also clacks loudly at idle and up to about 2000 rpm. The car is great, 192K and runs like a watch. When I am up at cruising speed (70-80) it is as smooth as silk. When I am on the street and come to a traffic light it idles ruff ( I can see my hood doing a jig) and is fairly loud (clackty clack) especially when I have the windows down (California guy). It idles, according to my tac, at about 700-750 rpm.

I had the valves adjusted (which it needed) but didn’t help. Since I am new I don’t know if there is any type of adjustment or tuning I can do to smooth things out or quite things down.

Any suggestions/comments?