It's whatever color coolant you are using in your Vanagon.  The reference to
"solid coolant" means no air, just liquid.
Jim

On Jan 3, 2008 2:14 PM, James Henry <jch@jchgis.com> wrote:

> Please tell us about "solid coolant". Is it orange, blue, or green? :-)
>
> Jim
>
>
> >Then take a 13mm box wrench and remove the radiator bleed screw. If solid
> coolant comes out, replace immediately and put things back together.
> >If air comes out, wait until solid coolant appears.
>
>