M20/B25 Radiator drain, flush and bleed procedure

["Thomas Bradford" <tbrad@xxxxxxxxxxxxxx>]

I've always been an 'oil changer', meaning I'd change my own oil
and take the car to the dealer for everything else.    With the purchase
of my second BMW a few months ago, I decided that I want to learn
how to perform routine maintenance chores myself.   This has grown
out of a desire to learn (personal satisfaction) and not because I want
to avoid the dealer.    I want to be one with my machine.. ommmm.... ;-)

Since the car I've purchased is used and I don't have the previous records,
I've been doing some of the easy's:  fuel/air filter changes, plugs, etc.   

Now I want to drain the antifreeze, flush the cooling system, and refill to
factory specs.      I can't seem to find a FAQ on this one, which means
it's probably absurdly easy...

The engine is an M20/B25 out of a 93 E30 325iC.     My Chilton's manual
refers to the radiators that have the integrated radiator / expansion tank
but my expansion tank is separate and just above the left front fender well.
and the directions for flushing and bleeding the system are a bit nebulous 
to say the least.

Question:  How do I do flush and bleed the system?    (I think I can figure
out how to empty the radiator.<g>)

I'll document this and create a FAQ and donate it to the list and various pages
when I pull this off.  ;-)

Many thanks,
Thomas
tbrad@domain.elided

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