Thanks for taking the time to post. What you say makes a lot of sense. It would certainly explain why I've had no luck finding any posts on the lower end. If nothing else the statistics are on my side.
I have a small leak around my oil level sender that I was planning to replace soon. I think I'll try to get a good look at the crankshaft sprocket when I have the pan off. I'm not positive but I think I should be able to see it fairly well once I'm in there. Just to be safe I'll try to pop off a digital photo to post for more experienced eyes to look at.
1988 420SEL 170K