Combustion is getting into your coolant time to reseal the heads.It is not
the cap.Mark
-----Original Message-----
From: Howard Fleming <hfleming@MOOSEBIRD.COM>
To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
Date: Tuesday, October 19, 1999 1:53 PM
Subject: Re: Cooling System: Strange Phenomenon

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.