Hello US car driver, my 1979 Buick Riviera S-Type has the following problem: After a short drive, smoke of burnt oil rises from the left cylinder bench. It definitely does not come from the valve cover, the seal I have just renewed. I have done everything clean, but can’t find a place where the oil comes out. If I run the engine in idle, it starts smoking at the place where the channel of the oil measuring rod disappears down. Somewhere down there it seems then off f to drop the exhaust manifold… But you can neither see from below nor from above where the oil comes out, because there is a sheet in front of it, which hides the manifold (see photo). The cooling water is absolutely clean, from the exhaust comes no white smoke and also the spark plug image is fine, why I first exclude the cylinder head seal. Does anyone have an idea where the problem might lie? Greetings Michael