Jay
The thermostat does not need to open because there is a small bypass valve built
into the thermostat that allows enough flow for bleeding purposes. Use a brick
or a stick to hold the throttle pedal for 3000 rpm. Alternatively use a cloths
peg at the throttle cable connection in the engine compartment. Better still,
get a helper.
Larry

Jay L Snyder wrote:

> Well, you should at least wait until the thermostat opens!  FAST is a
> relative term when dealing with Vanagons.  Besides, I can't reach the
> throttle from the bleed bolt!
>
>                                                             Jay