Are you sure the radiator fan came on at high speed?  Might want to check
on that.  I believe it should start out at low speed when the radiator
first gets hot enough.
  Generally you want the cap on the pressure tank when you start the
engine.  As the system gets hot the air in the top of the tank should be
pushed out to the reserve tank due to thermal expansion, when the pressure
gets high enough.
   When the system is hot, crack the bleeder at the top of the radiator.
 Forget about any other bleeders.
If you don't have a Bentley manual, you should get one.

Larry A.

On Sat, Sep 7, 2013 at 12:16 AM, David M <covrambles@yahoo.com> wrote:

> Continued my coolant top-up operation. Refilled tank again and brought
> engine up to full temperature. Gauge stayed in middle, radiator fan came on
> high-speed. Coolant tank overflowed so I stopped engine and screwed top
> back on tank and reconnected hose. Ran engine again and coolant went down a
> little more. Still NO coolant came out of thermostat bleed valve.
>
> David (1987 Wolfsburg)
>
>
>
> ________________________________
>