Where did you make the connections? You will need to tap into the heater
circuit to get flow before the thermostat opens. 

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Dave Chameides
Sent: Friday, February 04, 2005 1:50 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Coolant Pressure Issues

I am installing a coolant heater for my diesel that will be running on
veggie oil (hopefully soon).  The heater is located above the rear deck
of
the van about 1 foot above the engine.  I have run 5/8 line up through
some
holes that I cut in the floor of the rear deck.  I plumbed into the
coolant
system but can�t get the coolant to run up through the heater and back
out
again(the heater is basically a little maze of metal pipe in a small
area
with barbs on either end).  Now I didn�t run the van too long, probably
about 5 or ten minutes) because I was worried about overheating, but the
coolant wouldn�t run through the lines up through the heater and back
down
to the system).  I know that the coolant is a low pressure system, but
since
it�s a closed system shouldn�t it have to run its course?

Help.

Dave