Way to go, dude! It took some real hutzpah to revive one of these diesels. I have a very important question, though. Have you checked your compression since this? If there is hard evidence that the Marvel Mystery Oil can loosen up carbon junked rings, then I'll be shooting that stuff down my injector holes right before I go on vacation and let it do its thing for a week. I just replaced the head and there was a lot of carbon on the valve seats and stems. So there's at least good evidence that carbon and sticking is possible (I've got a little bit of blue smoke at idle). What do you think?

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1998 E300D, 287k, barely broken in.