The O-Ring is famous for failure. It's right behind the heater valve with
the plastic handle on the left side of the heater.  I'm thinking about that
unreachable right-side screw and I have seen ratcheted screwdrivers like a
small ratchet wrench with a screwdriver head. That would get in there.

For some good pictures of the heater disassembly and possible leak points
see:
http://www3.sympatico.ca/huotx/rear_heater.htm

Regards,
John Meeks
'91 Westfalia Multivan

BTW the 91 heater cover is moulded plastic and looks like the heater needs
to be loose to remove the cover.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
Of Germain
Sent: Sunday, June 08, 2003 10:32 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Heater under back seat

Hi John

My Westy is a 87. Maybe it is different. The cover is made of wood and cover
all the heater assembly (there are screw on each side and on the top). I
also noticed a small coolant leak on the lower pipe. I don't know where the
leak is coming from (the pipe or the heater). You where taking about an
O-ring. Maybe this is my problem also.

Germain

----- Original Message -----
From: "John Meeks" <jmeeks@gaslightmedia.com>
To: "Germain" <reglys@SYMPATICO.CA>; <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, June 08, 2003 10:05 PM
Subject: RE: Heater under back seat

> Germain,
> I have the same problem except that I couldn't remove the cover because
the
> air duct comes thru the cover. How did you get yours off? I need to check
> the O-Ring seal or some other source of a slight odor coming from that
> heater.
> My next move was going to be to remove the whole bench to get to it. I
> guess I'' wait to see if some list members have figured it out before I do
> anything stoopid...;=)
> Regards,
> John Meeks
> '91 Westfalia Multivan
>
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of Germain
> Sent: Sunday, June 08, 2003 9:38 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Heater under back seat
>
>
> Hi All
>
> I was cleaning my van the other day and specially under the back seat. I
> removed the small cover to get access to the heater. I was trying to
unscrew
> all the heater assembly to clean the unit. The previous owner had a dog
and
> the blower is full of hair dog and small paper gum. Is there any easy way
to
> unscrew the screw on the right side? This screw is not easy to reach. The
> motor is blocking the access to the screw.
>
> Thank you
>
> Germain
>