That plastic bag idea is a good one.  I put one of those "flush-n-fill"
adapters in the heater hose near the sliding door.  I wonder if vacuum
could somehow be used.  clean 5 gal bucket with lid.  two hoses coming out
the top.  one connects somewhere on the cooling system, the other to the
shop-vac.  maybe one of those drains in the water jackets near the pushrod
tubes?  Only one of mine will loosen...  Have to consider the thermostat
and what it blocks off when cold.
Edward

On Tue, Sep 15, 2015 at 2:20 PM, Michael Magnani <mfmagnani@sbcglobal.net>
wrote:

> One trick that I've had success with is using a heavy duty clear plastic
> bag to catch the coolant when I open a connection. You can get the opening
> of the bag really close to the connection and usually not spill a drop. And
> you can usually get it closer to the source than a bucket. Also, if the
> coolant is fresh enough to want to re-use, the plastic bag will keep it
> contaminate free and makes it easy to pour back in. I use open-topped bags
> that hold 1 to 2 gallons and then zip-tie them closed while I work on the
> coolant system.
> I also have an inline drain in one of my heater hoses and I'm always
> surprised by how much coolant remains in the system.
> Mike M
>