Hi, all here goes. The 85 300SD has been running well except when get to the bottom 1/4 tank. I still need to replace/clean fuel tank strainer. Yesterday I filled up and drove off. As I hit a wide open stretch of Toll road I opened her up
to about 85-90 mph then backed down slowly. When I got on the local streets again I noticed smoking at idle when stopped ( due to the car behinds headlights ) I know the valves need to be adjusted but could that be a cause.
I have read but do not fully understand the oil separator and how to read issues with it. I know a diesel will smoke but this seemed to be right after a fill up unless I just missed it before. Could it be the seasonal change in the fuel blend ? I have noticed that after I recently replaced the broken exhaust hangars
and that I still have a rattle/vibration that did not go away. I will investigate
tomorrow. Thoughts ?

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92 500E Silver 66k
82 Porsche 911SC 84K
68 Cadillac ( Gone Now )
03 Suburban Z71 200K
85 300SD 217k From Original Owner ( Dad )

Sorry, I rambled back and forth and posted before I finished. The issue of the exhaust rattle was more or less concern that oil might be leaking from the turbo over.

__________________
92 500E Silver 66k
82 Porsche 911SC 84K
68 Cadillac ( Gone Now )
03 Suburban Z71 200K
85 300SD 217k From Original Owner ( Dad )

You will always see a diesel smoke at night with headlights, it is the particulates of left over fuel. As for the exhaust rattle, I have a 300d so it might be different, but there were 4 hangars that had to be replaced before mine would stop vibrating/rattling.