Coolant flows through the engine anytime it is running, it might not be
passing through the radiator at idle, but through the bypass hoses and
heater cores. It's my understanding that idling the motor after long runs
prevents hot spots from developing in the coolant passages in the heads and
boiling the coolant at that point.

Good luck,

Tim Hannink
Winter Park, Florida
Goldibox - 1987 Vanagon Camper, Wolfsburg Edition
http://home.earthlink.net/~tjhannink/
http://photos.yahoo.com/tjhannink Vanagon Album
http://groups.yahoo.com/group/wolfsburg_campers/

-----Original Message-----
From:   Darren [SMTP:dfazio@BELLSOUTH.NET]
Sent:   Friday, June 28, 2002 12:44 PM
To:     vanagon@GERRY.VANAGON.COM
Subject:        Re: Radiator Design

> Unfortunately the h20 pump does not generate enough pressure at idle
to get the coolant "over the top".

It was my understanding that the engine be allowed to idle for a minute
before shutting off after a long trip for cooling reasons.  If no
coolant is flowing at idle then there is no reason to do this.  Is this
necessary?

Darren