Donna,

Coolant on the inside (you said alll over ... in the front, too?) is
likely from the rear heater valve, its O-Ring, or the rear heater core.

On one of mine, I had a leaky core and on another a bad O-Ring.  I
discovered the bad O-ring by getting the coolant system up to pressure
then wiggling the valve.  I could see the leak between the valve and the
core on that one.

Mike

Donna Skarloken wrote:
> My husband discovered yesterday that there's coolant leaking alll over
> the inside of the van.  It already looks like I'm having head gasket
> problems (rear coolant tank is overflowing), but I wonder if the rear
> heater valve is what's leaking inside the van.  I had to go to school
> and now am at work so can't check it out until the weekend.
>
> Donna, 87 Syncro