Geoff - I have an 87 300TD, so the block drain location may be different. I drive the car onto ramps and reach the drain from below, crack it loose, then spin it a turn or so with my fingers. It rains as well, but a 3 gal bucket (about the height of a 5 gal bucket cut in two) catches most of the fluid. I also pull the lower rad hose where it connects to the rad, which drains 80%-90% of the total. The lower hose is much faster than the rad drain.

I could add more citric acid, but I'm thinking about flushing it clear and calling it a day. As it stands now, I'll need at least two more flushes just to get it clear again. If I were to do it over, I'd start again with the degreaser, otherwise any residual oils/greases that were never flushed out to begin with would render the supplemental citric acid useless. Agree?

When it's all said and done, if nothing else I would have gotten rid of the nasty green in favor of G-05.