Possible a failing pressure cap on the coolent tank?
Howard

On 19 Oct 99, at 12:35, Eric Small wrote:

> Everything seemed fine for several days of city driving
> but when I got out on the freeway ...at speed...  coolant began to get
> pushed into the expansion bottle.  Once in the expansion bottle it does not get
> pulled back in as would be normally expected with the expansion cycle. If I go
> too far the expansion tank will overflow.