I have a situation that looks worse the more I dig. The valve line is very tarnished and dirty. There is dark oil build-up all over. I can literally scrape the goo off in areas.

I need some thoughts on purging the passages of oil and flushing things as best as I can. I thought of just dumping degreaser along the valve train and letting it works its way down with the oil pan off. Repeating over several days. Once things are buttoned back up, slowly crank the engine over with clean oil. Once its running, frequent oil changes at first.

Godo or bad idea. The alternative is to pull the heads and rip the whole thing down. I would rather avoid that for now.

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car