Hey List,

I just have to jump into this thread.  This information applies to 1.9
Vanagons.  I just looked at a pair of rear heater hoses that came out of an
1984 GL that I dismantled.  One of the hoses has a restrictor in it at the
heater end.  This restrictor reduces the diameter to about 6mm..  I can only
assume that using 5/8" hose into and back out of the heater will upset the
apple cart.  I purchased 2 of the "t's" from VW a few weeks ago and the were
less than $5.00 each at retail.

Walt Spak
Pittsburgh,  Pa.
wnsopc3@3rdm.net

----- Original Message -----
From: Lawrence Johnson <larry_avery.johnson@SYMPATICO.CA>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, January 13, 2000 10:32 AM
Subject: Re: Unusual Achilles heel discovered...

> Darrell Boehler wrote:
>
> > Hi Scott,
> >     You can replace the stock T with a 5/8 on all 3 points and then run
a
> > 5/8 heater hose to your rear heater. The present rear heater hose is 1/2
on
> > the T end and 5/8 at the heater core end. There are usually good reasons
why
> > engineers design things as they do but the rear heater Ts are beyond my
> > reasoning ability.
>
> Darrell, I suspect that reasoning behind the 1/2 rear heater line was to
balance
> the coolant flow between the front and rear heater circuits. The front
circuit
> is much longer than the rear and would restrict flow more. By choosing a
1/2
> line for the rear T'd from a 5/8 feed to the front, the flow rate would be
more
> equal (hopefully).
>
> Larry Johnson