I'm trying to eliminate piston rings as a cause of smoke in my 83 240d. It has good compression. Today I pulled my prechambers and looked at the top of the pistons. They were dry. I had run the car to operating temperature just prior to pulling the prechambers. Could I reasonably infer that the rings are sound??
I do not believe it is oil smoke, just wanting to eliminate the rings as suspect. The smoke is whitish gray with a hint of blue. It's all the time.