Well this is actually just a question of what I can do or try.

OK so we cannot remove oil from inside the rotors unless we hang our car from a crane or dive bomb off a cliff. (joke)

I want to really clean the crap out of my oil system but I do not want to use any of that flush terpentine karosene crap sold in the store. I just want to DRAIN as much as I can.

Does the oil cooler have a drain plug on it?? If not, what oil line can I disconnect without breaking?? I'll replace the copper crush rings.

Lots of miles on my car. Just want to drain clogged crap out.

 

Undo the front and rear oil lines take the filter off the filler cap grab the air hose and shoot it in all those holes you just opened up

 

will that drain a lot out the rotors?

 

If you perform regular maintenance, then there shouldn't be any crap.

1. Just change your oil/filter frequently and normal fresh oil's detergents will do the job.

2. If you bought the car used and you think that it was neglected, follow the back of the MMO bottle. I think that it can be run up to 20% and read number 1 again. MMO is an excellent detergent/lubricant.

Or you could just use any 10 minute engine flush. If you don't want to try the harsh engine flush, use a bottle of Seafoam(from NAPA) 1 hour prior to an oil change. It isn't as violent as the 10 minute flush but will do the work.
This will prevent issues with loosening/overtightening/breaking oil coolers/lines etc.

http://www.seafoamsales.com/motorTuneUpTechDiesel.htm

 

Cant I just tap a drain into my oil cooler???

 

I would think you would have to remove the oil cooler to drain it.

Just pulling the drain plug and thermo valve still won't let you drain all the oil out.

 

Most oil system cleaners should not hurt your engine. They're meant to eat away at oil and debris, not metal...