I can't address what to do about cleaning or examining anything once you've removed the oil pan - because in my case, every leak that looked like it...
I grabbed a MOCA MW05438 off ebay for 10.50, and I'm happy to say it even works! Will update if I learn anything of interest but my first impression...
I took the dark and medium green into town and flushed it into the municipal waste system at work. I took the last gallons of highly dilute solution...
Interesting. So you're dealing with a total volume ~100 quarts (or liters), a total weight ~200 pounds (or 100 kg). How scrupulous do you have to be...
Seems like the distributor would be pressed together, the signal rotor being pressed onto that shaft. Maybe you can find a way to rig up a puller to...